0001053507-26-000133 | 10-Q | XBRL Viewer

Print Document

NONCONTROLLING INTERESTS - Narrative (Details) € in Millions, $ in Millions	6 Months Ended		48 Months Ended
	Jun. 30, 2026 USD ($)	Jun. 30, 2026 EUR (€)	Aug. 31, 2026	Dec. 31, 2021
Stonepeak
Noncontrolling Interest [Line Items]
Dividends declared for common stock	$ 36.4
Preferred Stock \| Stonepeak
Noncontrolling Interest [Line Items]
Accrued dividends	$ 11.5
U.S. \| Data Centers \| Common Stock
Noncontrolling Interest [Line Items]
Percentage of ownership after transaction (as a percent)	71.00%	71.00%
U.S. \| Data Centers \| Common Stock \| Forecast
Noncontrolling Interest [Line Items]
Percentage of ownership after transaction (as a percent)			64.00%
Kirtonkhola Tower Bangladesh Limited
Noncontrolling Interest [Line Items]
Percentage of interests acquired (as a percent)				51.00%
Stonepeak \| Preferred Stock
Noncontrolling Interest [Line Items]
Dividends declared	$ 22.8
AT Europe C.V.
Noncontrolling Interest [Line Items]
Dividends declared	47.1	€ 41.4
AT Iberia C.V.
Noncontrolling Interest [Line Items]
Dividends declared	$ 77.0	€ 67.6
ATC Europe
Noncontrolling Interest [Line Items]
Controlling ownership interest percentage (as a percent)	52.00%
ATC Europe \| CDPQ
Noncontrolling Interest [Line Items]
Noncontrolling owner ownership percentage (as a percent)	30.00%
ATC Europe \| Allianz
Noncontrolling Interest [Line Items]
Noncontrolling owner ownership percentage (as a percent)	18.00%
France \| ATC Europe
Noncontrolling Interest [Line Items]
Controlling ownership interest percentage (as a percent)	100.00%
Germany
Noncontrolling Interest [Line Items]
Noncontrolling owner ownership percentage (as a percent)	13.00%
Germany \| ATC Europe
Noncontrolling Interest [Line Items]
Controlling ownership interest percentage (as a percent)	87.00%
Spain
Noncontrolling Interest [Line Items]
Noncontrolling owner ownership percentage (as a percent)	17.00%
Spain \| ATC Europe
Noncontrolling Interest [Line Items]
Controlling ownership interest percentage (as a percent)	83.00%
Kirtonkhola Tower Bangladesh Limited \| Confidence Group
Noncontrolling Interest [Line Items]
Noncontrolling owner ownership percentage (as a percent)				49.00%
Stonepeak \| U.S. \| Data Centers
Noncontrolling Interest [Line Items]
Preferred stock, dividend rate (as a percent)	5.00%	5.00%
Preferred stock, conversion ratio	1
Stonepeak \| U.S. \| Data Centers \| Common Stock
Noncontrolling Interest [Line Items]
Noncontrolling owner ownership percentage (as a percent)	29.00%
Stonepeak \| U.S. \| Data Centers \| Common Stock \| Forecast
Noncontrolling Interest [Line Items]
Noncontrolling owner ownership percentage (as a percent)			36.00%
Stonepeak \| U.S. \| Data Centers \| Preferred Stock
Noncontrolling Interest [Line Items]
Noncontrolling owner ownership percentage (as a percent)	100.00%

LEASES - Schedule of Weighted Average Lease Terms And Discount Rates (Details)	Jun. 30, 2026	Dec. 31, 2025
Operating leases:
Weighted-average remaining lease term (years)	13 years 8 months 12 days	13 years 4 months 24 days
Weighted-average incremental borrowing rate	6.80%	6.60%

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Statement of Cash Flows [Abstract]
Income tax refunds	$ 9.2	$ 6.6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,766.0	$ 879.1
Adjustments to reconcile net income to cash provided by operating activities
Depreciation, amortization and accretion	1,032.6	1,002.8
Stock-based compensation expense	92.6	100.7
Loss on retirement of long-term obligations	3.2	0.0
Other non-cash items reflected in statements of operations	50.0	826.6
Increase in net deferred rent balances	(0.0)	(45.3)
Right-of-use asset and Operating lease liability, net	35.9	29.3
Changes in unearned revenue	166.8	46.8
Increase in assets	(160.4)	(219.8)
Decrease in liabilities	(99.3)	(43.7)
Cash provided by operating activities	2,887.4	2,576.5
CASH FLOWS FROM INVESTING ACTIVITIES
Payments for purchase of property and equipment and construction activities	(770.4)	(635.7)
Payments for acquisitions, net of cash acquired	(133.2)	(332.3)
Proceeds from sale of short-term investments and other non-current assets	76.5	137.7
Deposits and other	(6.6)	(10.9)
Cash used for investing activities	(833.7)	(841.2)
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowings under credit facilities	3,601.1	3,632.3
Proceeds from issuance of senior notes, net	872.2	1,560.0
Proceeds from other borrowings	0.0	1.2
Repayments of notes payable, credit facilities, senior notes, secured debt and finance leases	(4,274.1)	(5,318.2)
Distributions to noncontrolling interest holders	(94.0)	(111.9)
Contributions from noncontrolling interest holders	4.3	111.3
Purchases of common stock	(202.9)	0.0
Proceeds from stock options and employee stock purchase plan	21.0	30.1
Distributions paid on common stock	(1,641.3)	(1,564.7)
Payment for early retirement of long-term obligations	(2.8)	0.0
Deferred financing costs and other financing activities	(86.2)	(90.6)
Cash used for financing activities	(1,802.7)	(1,750.5)
Net effect of changes in foreign currency exchange rates on cash and cash equivalents, and restricted cash	36.4	116.6
NET INCREASE IN CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH	287.4	101.4
CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH, BEGINNING OF PERIOD	1,605.2	2,108.2
CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH, END OF PERIOD	1,892.6	2,209.6
CASH PAID FOR INCOME TAXES (NET OF REFUNDS OF $9.2 AND $6.6, RESPECTIVELY)	163.2	131.4
CASH PAID FOR INTEREST	789.4	684.2
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Purchases of property and equipment under finance leases and perpetual easements	12.4	6.7
Decrease in accounts payable and accrued expenses for purchases of property and equipment and construction activities	(0.2)	(11.4)
Seller financed acquisition	$ 0.0	$ 5.0

FAIR VALUE MEASUREMENTS - Contractual Amounts of Outstanding Instruments (Details) $ in Millions, € in Billions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)	Jun. 30, 2026 EUR (€)	Jun. 01, 2025 USD ($)	Jun. 01, 2025 EUR (€)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unrealized foreign currency gains (losses) for net investment hedge	$ 61.4	$ (204.6)	$ 151.0	$ (204.6)
Net Investment Hedge
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contractual amount			5,368.4		$ 5,461.6
Debt outstanding	$ 5,400.0		$ 5,400.0			€ 4.7	$ 5,300.0	€ 4.7

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

+ Details

STOCK-BASED COMPENSATION - Summary of RSUs and PSUs (Details) - shares	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025	Dec. 31, 2024
RSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding at beginning of period (in shares)	1,283,669
Granted (in shares)	669,558
Vested and Released (in shares)	(728,102)
Forfeited (in shares)	(25,751)
Outstanding at end of period (in shares)	1,199,374	1,283,669
Vested and deferred (in shares)	20,358
PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding at beginning of period (in shares)	333,401
Granted (in shares)	100,692
Vested and Released (in shares)	(169,098)
Forfeited (in shares)	0
Outstanding at end of period (in shares)	264,995	333,401
Vested and deferred (in shares)	0
PSUs \| 2025 PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding at beginning of period (in shares)	86,911
Granted (in shares)		86,911
Outstanding at end of period (in shares)		86,911
Performance period		3 years
PSUs \| 2024 PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding at beginning of period (in shares)	77,392
Granted (in shares)			87,550
Outstanding at end of period (in shares)		77,392
Performance period		3 years
PSUs \| 2023 PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding at beginning of period (in shares)	169,098
Outstanding at end of period (in shares)		169,098
Performance period		3 years
PSUs \| 2026 PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Granted (in shares)	100,692
Performance period	3 years

EARNINGS PER COMMON SHARE - Shares Excluded From Computation of Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from dilutive effect (in shares)	243	0	2	1

LEASES - Schedule of Lease Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Leases [Abstract]
Operating lease cost	$ 295.5	$ 283.1	$ 585.3	$ 556.3
Variable lease costs not included in lease liability	$ 89.1	$ 80.8	$ 180.3	$ 167.1

GOODWILL AND OTHER INTANGIBLE ASSETS

6 Months Ended

Jun. 30, 2026

Intangible Asset, Goodwill and Other [Abstract]

GOODWILL AND OTHER INTANGIBLE ASSETS

The changes in the carrying value of goodwill for each of the Company’s business segments were as follows:


	Property										Services		Total
	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers
Balance as of January 1, 2026	$	4,636.8	$	521.9	$	3,247.3	$	927.5	$	2,920.0	$	2.0	$	12,255.5



Effect of foreign currency translation	(1.6)		(5.1)		(89.4)		22.1		—		—		(74.0)
Balance as of June 30, 2026	$	4,635.2	$	516.8	$	3,157.9	$	949.6	$	2,920.0	$	2.0	$	12,181.5

The Company’s other intangible assets subject to amortization consisted of the following:


		As of June 30, 2026						As of December 31, 2025
	Estimated Useful Lives (years)	Gross Carrying Value		Accumulated Amortization		Net Book Value		Gross Carrying Value		Accumulated Amortization		Net Book Value
Acquired network location intangibles (1)	Up to 30	$	5,489.1	$	(2,858.9)	$	2,630.2	$	5,511.3	$	(2,798.4)	$	2,712.9
Acquired tenant-related intangibles	Up to 30	18,527.6		(7,902.6)		10,625.0		18,636.8		(7,609.3)		11,027.5
Acquired licenses and other intangibles	2-30	1,324.4		(599.0)		725.4		1,332.8		(542.5)		790.3
Total other intangible assets		$	25,341.1	$	(11,360.5)	$	13,980.6	$	25,480.9	$	(10,950.2)	$	14,530.7

_______________

(1)Acquired network location intangibles are amortized over the remaining estimated useful life of the tower, taking into account residual value, generally up to 30 years, as the Company considers these intangibles to be directly related to the tower assets.

The acquired network location intangibles represent the value to the Company of the incremental revenue growth that could potentially be obtained from leasing the excess capacity on acquired tower communications infrastructure. The acquired tenant-related intangibles typically represent the value to the Company of tenant contracts and relationships in place at the time of an acquisition or similar transaction, including assumptions regarding estimated renewals. Other intangibles represent the value of acquired licenses, trade name and in place leases. In place lease value represents the fair value of costs avoided in securing data center customers, including vacancy periods, legal costs and commissions. In place lease value also includes assumptions on similar costs avoided upon the renewal or extension of existing leases on a basis consistent with occupancy assumptions used in the fair value of other assets.

The Company amortizes its acquired intangible assets on a straight-line basis over their estimated useful lives. As of June 30, 2026, the remaining weighted average amortization period of the Company’s intangible assets was 19 years. Amortization of intangible assets for the three and six months ended June 30, 2026 was $215.9 million and $432.3 million, respectively. Amortization of intangible assets for the three and six months ended June 30, 2025 was $218.9 million and $433.0 million, respectively. Based on current exchange rates, the Company expects to record amortization expense as follows over the remainder of the current year and the five subsequent years:


Fiscal Year	Amount
Remainder of 2026	$	426.9
2027	830.5
2028	821.0
2029	804.1
2030	792.2
2031	787.2

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Jun. 30, 2026
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

6 Months Ended

Jun. 30, 2026

Intangible Asset, Goodwill and Other [Abstract]

Schedule of Changes in the Carrying Value of Goodwill

The changes in the carrying value of goodwill for each of the Company’s business segments were as follows:


	Property										Services		Total
	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers
Balance as of January 1, 2026	$	4,636.8	$	521.9	$	3,247.3	$	927.5	$	2,920.0	$	2.0	$	12,255.5



Effect of foreign currency translation	(1.6)		(5.1)		(89.4)		22.1		—		—		(74.0)
Balance as of June 30, 2026	$	4,635.2	$	516.8	$	3,157.9	$	949.6	$	2,920.0	$	2.0	$	12,181.5

Schedule of Other Intangible Assets Subject to Amortization

The Company’s other intangible assets subject to amortization consisted of the following:


		As of June 30, 2026						As of December 31, 2025
	Estimated Useful Lives (years)	Gross Carrying Value		Accumulated Amortization		Net Book Value		Gross Carrying Value		Accumulated Amortization		Net Book Value
Acquired network location intangibles (1)	Up to 30	$	5,489.1	$	(2,858.9)	$	2,630.2	$	5,511.3	$	(2,798.4)	$	2,712.9
Acquired tenant-related intangibles	Up to 30	18,527.6		(7,902.6)		10,625.0		18,636.8		(7,609.3)		11,027.5
Acquired licenses and other intangibles	2-30	1,324.4		(599.0)		725.4		1,332.8		(542.5)		790.3
Total other intangible assets		$	25,341.1	$	(11,360.5)	$	13,980.6	$	25,480.9	$	(10,950.2)	$	14,530.7

_______________

Schedule of Expected Future Amortization Expenses

Based on current exchange rates, the Company expects to record amortization expense as follows over the remainder of the current year and the five subsequent years:


Fiscal Year	Amount
Remainder of 2026	$	426.9
2027	830.5
2028	821.0
2029	804.1
2030	792.2
2031	787.2

- Definition

Tabular disclosure of goodwill.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-2

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 24
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482548/350-20-55-24

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1A

+ Details

PREPAID AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid assets	$ 109.6	$ 80.7
Prepaid income tax	127.2	66.7
Unbilled receivables	200.4	194.8
Value added tax and other consumption tax receivables	38.3	44.5
Other miscellaneous current assets	103.4	99.6
Prepaid and other current assets	$ 578.9	$ 486.3

STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2026

Share-Based Payment Arrangement [Abstract]

Schedule of Stock-Based Compensation Expense

During the six months ended June 30, 2026 and 2025, the Company recorded the following stock-based compensation expense in selling, general, administrative and development expense:


	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
Stock-based compensation expense (1)	$	34.2	$	47.3	$	92.6	$	100.7

_______________

(1)For the six months ended June 30, 2025, includes the reversal of $7.1 million of previously recognized stock-based compensation expense associated with awards forfeited in connection with the departure of the Company’s former Executive Vice President and President, APAC due to such role being eliminated.

Schedule of Option Activity

The Company’s option activity for the six months ended June 30, 2026 was as follows (shares disclosed in full amounts):


						Number of Options
Outstanding as of January 1, 2026						133,623

Exercised						(133,623)
Forfeited						—
Expired						—
Outstanding as of June 30, 2026						—

Schedule of Fair Value Level of Inputs

Below are the three levels of inputs that may be used to measure fair value:


			Level 1			Quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.

			Level 2			Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

			Level 3			Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Key assumptions used to apply this pricing model were as follows:


	2026		2025		2024

Expected term (years)	2.81		2.81		2.81
Risk-free interest rate	3.58	%	3.91	%	4.31	%
Annualized volatility	25.42	%	27.91	%	26.75	%

Schedule of RSU Activity

The Company’s RSU and PSU activity for the six months ended June 30, 2026 was as follows (shares disclosed in full amounts):


	RSUs	PSUs
Outstanding as of January 1, 2026 (1)	1,283,669	333,401
Granted (2)	669,558	100,692
Vested and Released (3)	(728,102)	(169,098)
Forfeited	(25,751)	—
Outstanding as of June 30, 2026	1,199,374	264,995
Vested and deferred as of June 30, 2026 (4)	20,358	—

_______________

(1)PSUs consist of the target number of shares issuable at the end of the three-year performance period for the outstanding 2025 PSUs and the outstanding 2024 PSUs, or 86,911 shares and 77,392 shares, respectively, and the shares issuable at the end of the three-year performance period for the PSUs granted in 2023 (the “2023 PSUs”) based on achievement against the performance metrics for the three-year performance period, or 169,098 shares.

(2)PSUs consist of the target number of shares issuable at the end of the three-year performance period for the 2026 PSUs, or 100,692 shares.

(3)PSUs consist of shares vested pursuant to the 2023 PSUs. There are no additional shares to be earned related to the 2023 PSUs.

(4)Vested and deferred RSUs are related to deferred compensation for certain former employees.

Schedule of PSU Activity

The Company’s RSU and PSU activity for the six months ended June 30, 2026 was as follows (shares disclosed in full amounts):


	RSUs	PSUs
Outstanding as of January 1, 2026 (1)	1,283,669	333,401
Granted (2)	669,558	100,692
Vested and Released (3)	(728,102)	(169,098)
Forfeited	(25,751)	—
Outstanding as of June 30, 2026	1,199,374	264,995
Vested and deferred as of June 30, 2026 (4)	20,358	—

_______________

(2)PSUs consist of the target number of shares issuable at the end of the three-year performance period for the 2026 PSUs, or 100,692 shares.

(3)PSUs consist of shares vested pursuant to the 2023 PSUs. There are no additional shares to be earned related to the 2023 PSUs.

(4)Vested and deferred RSUs are related to deferred compensation for certain former employees.

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Millions				3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 29, 2026	Jun. 15, 2026	Jun. 14, 2026	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Accounting Policies [Line Items]
Property straight-line revenue				$ (18.9)	$ 28.2	$ 0.0	$ 45.3
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| ATC Philippines
Accounting Policies [Line Items]
Total consideration received upon disposal		$ 75.6
Gain (loss) on sale of subsidiary		$ 33.2
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Kirtonkhola Tower Bangladesh Limited
Accounting Policies [Line Items]
Total consideration received upon disposal	$ 6.9
Gain (loss) on sale of subsidiary	$ (12.8)
U.S. \| Data Centers \| Common Stock
Accounting Policies [Line Items]
Percentage of ownership after transaction (as a percent)						71.00%
APAC \| Product Benchmark \| Property \| Geographic Concentration Risk
Accounting Policies [Line Items]
Concentration risk percentage (less than for year ended December 31, 2025)								1.00%
APAC \| Segment Gross Margin \| Geographic Concentration Risk
Accounting Policies [Line Items]
Concentration risk percentage (less than for year ended December 31, 2025)								1.00%
APAC \| Segment Operating Profit \| Geographic Concentration Risk
Accounting Policies [Line Items]
Concentration risk percentage (less than for year ended December 31, 2025)								1.00%
APAC \| Communication Sites \| Geographic Concentration Risk
Accounting Policies [Line Items]
Concentration risk percentage (less than for year ended December 31, 2025)			1.00%
ATC Europe
Accounting Policies [Line Items]
Controlling ownership interest percentage (as a percent)				52.00%		52.00%
Stonepeak \| U.S. \| Data Centers \| Common Stock
Accounting Policies [Line Items]
Noncontrolling owner ownership percentage (as a percent)				29.00%		29.00%
Stonepeak \| U.S. \| Data Centers \| Preferred stock
Accounting Policies [Line Items]
Noncontrolling owner ownership percentage (as a percent)				100.00%		100.00%
Germany
Accounting Policies [Line Items]
Noncontrolling owner ownership percentage (as a percent)				13.00%		13.00%
Germany \| ATC Europe
Accounting Policies [Line Items]
Controlling ownership interest percentage (as a percent)				87.00%		87.00%
Spain
Accounting Policies [Line Items]
Noncontrolling owner ownership percentage (as a percent)				17.00%		17.00%
Spain \| ATC Europe
Accounting Policies [Line Items]
Controlling ownership interest percentage (as a percent)				83.00%		83.00%

NONCONTROLLING INTERESTS (Tables)

6 Months Ended

Jun. 30, 2026

Noncontrolling Interest [Abstract]

Schedule of Changes in Noncontrolling Interests

The changes in noncontrolling interests were as follows:


	Six Months Ended June 30,
	2026		2025
Balance as of January 1,	$	6,702.8	$	6,266.5
Impact of sale of Bangladesh partnership on noncontrolling interests	(13.2)		—
Net income attributable to noncontrolling interests	39.0		23.6
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax	(106.2)		476.5
Contributions from noncontrolling interest holders	4.3		111.3
Distributions to noncontrolling interest holders	(93.9)		(111.8)
Balance as of June 30,	$	6,532.8	$	6,766.1

EQUITY (Tables)

6 Months Ended

Jun. 30, 2026

Equity [Abstract]

Schedule of Cash Distributions

During the six months ended June 30, 2026, the Company declared or paid the following cash distributions (per share data reflects actual amounts):


Declaration Date	Payment Date	Record Date	Distribution per share		Aggregate Payment Amount (1)
Common Stock

May 21, 2026	July 13, 2026	June 12, 2026	$	1.79	$	834.1
March 5, 2026	April 28, 2026	April 14, 2026	$	1.79	$	833.9
December 4, 2025	February 2, 2026	December 29, 2025	$	1.70	$	792.9

_______________

(1)Does not include amounts accrued for distributions payable related to unvested restricted stock units.

During the six months ended June 30, 2025, the Company declared or paid the following cash distributions (per share data reflects actual amounts):


Declaration Date	Payment Date	Record Date	Distribution per share		Aggregate Payment Amount (1)
Common Stock

May 15, 2025	July 11, 2025	June 13, 2025	$	1.70	$	796.0
March 6, 2025	April 28, 2025	April 11, 2025	$	1.70	$	795.8
December 5, 2024	February 3, 2025	December 27, 2024	$	1.62	$	757.1

_______________

(1)Does not include amounts accrued for distributions payable related to unvested restricted stock units.

BUSINESS SEGMENTS - Narrative (Details)	6 Months Ended
BUSINESS SEGMENTS - Narrative (Details)	Jun. 30, 2026 center market
Segment Reporting [Line Items]
Number of Reportable Segments Disclosed By Definition Flag
Data Centers
Segment Reporting [Line Items]
Number of data centers operated \| center	30
Number of operating markets \| market	11

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-34

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (ee)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-31

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26C

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26B

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26A

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 25
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-25

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 25
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-25

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (j)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-15

+ Details

CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Millions	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Distributions in Excess of Earnings	Noncontrolling Interests
Balance at beginning of period (in shares) at Dec. 31, 2024		478,388
Balance at beginning of period (in shares) at Dec. 31, 2024			(11,004)
Balance at beginning of period at Dec. 31, 2024	$ 9,648.7	$ 4.8	$ (1,301.2)	$ 15,057.3	$ (5,954.6)	$ (4,424.1)	$ 6,266.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity (in shares)		794
Stock-based compensation related activity	67.9	$ 0.0		67.9
Issuance of common stock - stock purchase plan (in shares)		46
Issuance of common stock - stock purchase plan	8.1	$ 0.0		8.1
Foreign currency translation adjustment, net of tax	1,471.4				994.9		476.5
Contributions from noncontrolling interest holders	111.3						111.3
Distributions to noncontrolling interest holders	(111.8)						(111.8)
Common stock distributions declared	(1,595.8)					(1,595.8)
Impact of sale of Bangladesh partnership on noncontrolling interests							0.0
Net (loss) income	879.1					855.5	23.6
Balance at end of period (in shares) at Jun. 30, 2025		479,228
Balance at end of period (in shares) at Jun. 30, 2025			(11,004)
Balance at end of period at Jun. 30, 2025	10,478.9	$ 4.8	$ (1,301.2)	15,133.3	(4,959.7)	(5,164.4)	6,766.1
Balance at beginning of period (in shares) at Mar. 31, 2025		479,131
Balance at beginning of period (in shares) at Mar. 31, 2025			(11,004)
Balance at beginning of period at Mar. 31, 2025	9,936.3	$ 4.8	$ (1,301.2)	15,077.7	(5,514.0)	(4,732.5)	6,401.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity (in shares)		51
Stock-based compensation related activity	47.5	$ 0.0		47.5
Issuance of common stock - stock purchase plan (in shares)		46
Issuance of common stock - stock purchase plan	8.1	$ 0.0		8.1
Foreign currency translation adjustment, net of tax	877.8				554.3		323.5
Contributions from noncontrolling interest holders	110.5						110.5
Distributions to noncontrolling interest holders	(83.1)						(83.1)
Common stock distributions declared	(798.7)					(798.7)
Net (loss) income	380.5					366.8	13.7
Balance at end of period (in shares) at Jun. 30, 2025		479,228
Balance at end of period (in shares) at Jun. 30, 2025			(11,004)
Balance at end of period at Jun. 30, 2025	$ 10,478.9	$ 4.8	$ (1,301.2)	15,133.3	(4,959.7)	(5,164.4)	6,766.1
Balance at beginning of period (in shares) at Dec. 31, 2025	466,318	479,358
Balance at beginning of period (in shares) at Dec. 31, 2025	(13,040)		(13,040)
Balance at beginning of period at Dec. 31, 2025	$ 10,355.3	$ 4.8	$ (1,665.8)	15,215.3	(4,815.8)	(5,086.0)	6,702.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity (in shares)		749
Stock-based compensation related activity	53.2	$ 0.0		53.2
Issuance of common stock - stock purchase plan (in shares)		56
Issuance of common stock - stock purchase plan	8.4	$ 0.0		8.4
Treasury stock activity (in shares)			(1,164)
Treasury stock activity	(202.9)		$ (202.9)
Foreign currency translation adjustment, net of tax	48.6				154.8		(106.2)
Contributions from noncontrolling interest holders	4.3						4.3
Distributions to noncontrolling interest holders	(93.9)						(93.9)
Common stock distributions declared	(1,673.3)					(1,673.3)
Impact of sale of Bangladesh partnership on noncontrolling interests	(13.2)						(13.2)
Net (loss) income	$ 1,766.0					1,727.0	39.0
Balance at end of period (in shares) at Jun. 30, 2026	465,959	480,163
Balance at end of period (in shares) at Jun. 30, 2026	(14,204)		(14,204)
Balance at end of period at Jun. 30, 2026	$ 10,252.5	$ 4.8	$ (1,868.7)	15,276.9	(4,661.0)	(5,032.3)	6,532.8
Balance at beginning of period (in shares) at Mar. 31, 2026		480,083
Balance at beginning of period (in shares) at Mar. 31, 2026			(14,093)
Balance at beginning of period at Mar. 31, 2026	10,152.1	$ 4.8	$ (1,849.5)	15,236.0	(4,805.3)	(5,063.4)	6,629.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity (in shares)		24
Stock-based compensation related activity	32.5	$ 0.0		32.5
Issuance of common stock - stock purchase plan (in shares)		56
Issuance of common stock - stock purchase plan	8.4	$ 0.0		8.4
Treasury stock activity (in shares)			(111)
Treasury stock activity	(19.2)		$ (19.2)
Foreign currency translation adjustment, net of tax	101.5				144.3		(42.8)
Contributions from noncontrolling interest holders	3.5						3.5
Distributions to noncontrolling interest holders	(64.2)						(64.2)
Common stock distributions declared	(836.4)					(836.4)
Impact of sale of Bangladesh partnership on noncontrolling interests	(13.2)						(13.2)
Net (loss) income	$ 887.5					867.5	20.0
Balance at end of period (in shares) at Jun. 30, 2026	465,959	480,163
Balance at end of period (in shares) at Jun. 30, 2026	(14,204)		(14,204)
Balance at end of period at Jun. 30, 2026	$ 10,252.5	$ 4.8	$ (1,868.7)	$ 15,276.9	$ (4,661.0)	$ (5,032.3)	$ 6,532.8

LONG-TERM OBLIGATIONS (Tables)

6 Months Ended

Jun. 30, 2026

Debt Disclosure [Abstract]

Schedule of Long-Term Debt Instruments

Outstanding amounts under the Company’s long-term obligations, reflecting discounts, premiums and debt issuance costs, consisted of the following:


	As of
	June 30, 2026		December 31, 2025		Maturity Date
2021 Multicurrency Credit Facility (1)	$	1,085.0	$	380.0	May 1, 2029
2021 Term Loan (1)	997.9		998.1		May 1, 2029
2021 Credit Facility (1)	695.0		—		May 1, 2031
4.400% senior notes (2)	—		499.9		N/A
1.600% senior notes (3)	—		699.7		N/A
1.950% senior notes (4)	—		586.9		N/A
1.450% senior notes (5)	599.7		598.9		September 15, 2026
3.375% senior notes (5)	999.4		998.5		October 15, 2026
3.125% senior notes (5)	399.8		399.6		January 15, 2027
2.750% senior notes (5)	749.4		749.0		January 15, 2027
0.450% senior notes (5) (6)	856.0		879.7		January 15, 2027
0.400% senior notes (5) (6)	570.4		585.8		February 15, 2027
3.650% senior notes (5)	648.8		648.0		March 15, 2027


4.125% senior notes (5) (6) (7)	399.2		703.1		May 16, 2027
3.55% senior notes	749.1		748.7		July 15, 2027
3.600% senior notes	698.4		697.9		January 15, 2028
0.500% senior notes (6)	854.7		878.3		January 15, 2028
1.500% senior notes	648.9		648.5		January 31, 2028
5.500% senior notes	697.2		696.5		March 15, 2028
5.250% senior notes	647.1		646.4		July 15, 2028
5.800% senior notes	746.5		745.9		November 15, 2028
5.200% senior notes	645.8		645.1		February 15, 2029
3.950% senior notes	596.6		596.0		March 15, 2029
0.875% senior notes (6)	854.4		878.2		May 21, 2029
3.800% senior notes	1,643.4		1,642.4		August 15, 2029
2.900% senior notes	746.5		746.0		January 15, 2030
5.000% senior notes	595.1		594.4		January 31, 2030
4.900% senior notes	848.2		848.0		March 15, 2030
3.900% senior notes (6)	567.6		583.3		May 16, 2030
2.100% senior notes	745.7		745.2		June 15, 2030
0.950% senior notes (6)	567.3		583.1		October 5, 2030
1.875% senior notes	795.7		795.2		October 15, 2030
2.700% senior notes	696.6		696.3		April 15, 2031
4.625% senior notes (6)	566.4		582.2		May 16, 2031
2.300% senior notes	694.9		694.5		September 15, 2031
1.000% senior notes (6)	738.2		758.8		January 15, 2032
4.050% senior notes	644.8		644.4		March 15, 2032
3.625% senior notes (6)	567.9		583.9		May 30, 2032
4.700% senior notes	840.9		840.4		December 15, 2032
5.650% senior notes	792.8		792.3		March 15, 2033
1.250% senior notes (6)	566.4		582.4		May 21, 2033
5.550% senior notes	842.6		842.2		July 15, 2033
4.000% senior notes (6)	848.3		—		September 1, 2033
5.900% senior notes	743.2		742.9		November 15, 2033
5.450% senior notes	641.9		641.5		February 15, 2034
4.100% senior notes (6)	564.9		580.8		May 16, 2034
5.400% senior notes	592.9		592.5		January 31, 2035
5.350% senior notes	731.1		731.4		March 15, 2035
3.700% senior notes	592.9		592.8		October 15, 2049
3.100% senior notes	1,039.3		1,039.1		June 15, 2050
2.950% senior notes	1,024.9		1,024.5		January 15, 2051
Total American Tower Corporation debt	35,379.7		35,409.2

Series 2018-1A securities (8)	498.7		498.3		March 15, 2028
Series 2023-1A securities (9)	1,293.6		1,291.7		March 15, 2028
Other subsidiary debt (10)	3.2		5.2		Various
Total American Tower subsidiary debt	1,795.5		1,795.2
Finance lease obligations	14.4		15.9
Total	37,189.6		37,220.3
Less current portion of long-term obligations	(5,226.5)		(3,387.8)
Long-term obligations	$	31,963.1	$	33,832.5

_______________

(1)Accrues interest at a variable rate.

(2)Repaid in full on February 13, 2026 using borrowings under the 2021 Credit Facility (as defined below) and cash on hand.

(3)Repaid in full on April 14, 2026 using borrowings under the 2021 Credit Facility and cash on hand.

(4)Repaid in full on May 21, 2026 using borrowings under the 2021 Multicurrency Credit Facility.

(5)Included in Current portion of long-term obligations.

(6)Notes are denominated in Euro (“EUR”).

(7)Partially redeemed on June 18, 2026 using proceeds from the issuance of the 4.000% Notes (as defined below).

(8)Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2048.

(9)Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2053.

(10)As of June 30, 2026 includes debt entered into by the Company’s Data Centers business in connection with an acquisition of a multi-tenant data facility in Denver, Colorado, which is denominated in U.S. Dollars and is payable in monthly installments through March 31, 2028. As of December 31, 2025 also included borrowings under an unsecured term loan in Bangladesh, which was denominated in Bangladeshi Taka (the “Bangladesh Term Loan”). The Bangladesh Term Loan was assumed by the buyer in the sale of the Company’s noncontrolling interest in KTBL.

The key terms of the 4.000% Notes are as follows:

Senior Notes

Aggregate Principal Amount (in millions)

Issue Date and Interest Accrual Date

Maturity Date

Contractual Interest Rate

First Interest Payment

Interest Payments Due (1)

Par Call Date (2)

4.000% Notes (3)

872.0

May 27, 2026

September 1, 2033

4.000%

September 1, 2026

September 1

July 1, 2033

___________

(1)Interest on EUR denominated notes is payable in EUR annually in arrears and will be computed on the basis of the actual number of days in the period for which interest is being calculated and the actual number of days from and including the last date on which interest was paid on the notes, beginning on the issue date.

(2)The Company may redeem the 4.000% Notes at any time, in whole or in part, at a redemption price equal to 100% of the principal amount of the 4.000% Notes plus a make-whole premium, together with accrued interest to the redemption date. If the Company redeems the 4.000% Notes on or after the par call date, the Company will not be required to pay a make-whole premium.

(3)The 4.000% Notes are denominated in EUR; dollar amounts represent the aggregate principal amount at the issuance date.

As of June 30, 2026, the key terms under the Loans were as follows:


	Outstanding Principal Balance (in millions)		Undrawn letters of credit (in millions)		Maturity Date		Current margin over SOFR or EURIBOR (1)		Current commitment fee (2)
2021 Multicurrency Credit Facility	$	1,085.0	$	18.7	May 1, 2029	(3)	0.875	%	0.100	%
2021 Credit Facility	695.0		20.7		May 1, 2031	(3)	0.875	%	0.100	%
2021 Term Loan	1,000.0		N/A		May 1, 2029		0.875	%	N/A

_______________

(1)Secured Overnight Financing Rate (“SOFR”) applies to the USD denominated borrowings under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility and the 2021 Term Loan. Euro Interbank Offer Rate (“EURIBOR”) applies for EURIBOR based borrowings.

(2)Fee on undrawn portion of each credit facility.

(3)Subject to two optional renewal periods.

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.9-06)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-8

Reference 4: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-7

Reference 5: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-6

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-9

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

Reference 11: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B

Reference 12: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481568/470-20-55-69E

Reference 13: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 14: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477734/942-470-50-3

+ Details

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025	Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 1,762.5	$ 1,474.8	$ 2,076.0
Restricted cash	130.1	130.4	133.6
Total cash, cash equivalents and restricted cash	$ 1,892.6	$ 1,605.2	$ 2,209.6	$ 2,108.2

LEASES - Schedule of Information About Other Lease-related Balances (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Operating leases:
Right-of-use asset	$ 8,466.2	$ 8,426.5
Current portion of lease liability	644.1	584.9
Lease liability	7,146.2	7,158.7
Total lease liability	$ 7,790.3	$ 7,743.6

LEASES (Tables)

6 Months Ended

Jun. 30, 2026

Leases [Abstract]

Schedule of Future Minimum Rental Receipts Expected Under Operating Leases

Future minimum rental receipts expected under non-cancellable operating lease agreements as of June 30, 2026 were as follows:


Fiscal Year	Amount (1) (2)
Remainder of 2026	$	4,443.4
2027	8,752.6
2028	7,338.1
2029	6,854.6
2030	5,541.6
Thereafter	16,965.3
Total	$	49,895.6

_______________

(1)Balances are translated at the applicable period-end exchange rate, which may impact comparability between periods.

(2)Balances represent contractual amounts owed with no adjustments made for expected collectibility. As of June 30, 2026, balances exclude contractual amounts owed from one of the Company’s U.S. customers, DISH Wireless L.L.C., a subsidiary of DISH Network Corporation (“DISH”).

Schedule of Information About Other Lease-Related Balances

Information about other lease-related balances is as follows:


	As of
	June 30, 2026		December 31, 2025
Operating leases:
Right-of-use asset	$	8,466.2	$	8,426.5

Current portion of lease liability	$	644.1	$	584.9
Lease liability	7,146.2		7,158.7
Total operating lease liability	$	7,790.3	$	7,743.6

Schedule of Components of Operating Lease Cost

The weighted-average remaining lease terms and incremental borrowing rates are as follows:


	As of
	June 30, 2026		December 31, 2025
Operating leases:
Weighted-average remaining lease term (years)	13.7		13.4
Weighted-average incremental borrowing rate	6.8	%	6.6	%

The following table sets forth the components of lease cost:


	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
Operating lease cost	$	295.5	$	283.1	$	585.3	$	556.3
Variable lease costs not included in lease liability (1)	89.1		80.8		180.3		167.1

______________

(1)Primarily includes property tax paid on behalf of the landlord.

Supplemental cash flow information is as follows:


	Six Months Ended June 30,
	2026		2025
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(613.4)	$	(574.5)



Non-cash items:
New operating leases (1)	$	78.8	$	97.9
Operating lease modifications and reassessments	$	229.1	$	198.7

______________

(1)Amount includes new operating leases and leases acquired in connection with acquisitions.

Schedule of Maturity of Operating Lease Liabilities

Maturities of operating lease liabilities as of June 30, 2026 were as follows:


Fiscal Year	Operating Lease (1)
Remainder of 2026	$	533.2
2027	1,042.4
2028	1,001.9
2029	963.2
2030	915.9
Thereafter	7,479.5
Total lease payments	11,936.1
Less amounts representing interest	(4,145.8)
Total lease liability	7,790.3
Less current portion of lease liability	644.1
Non-current lease liability	$	7,146.2

_______________

(1)Balances are translated at the applicable period-end exchange rate, which may impact comparability between periods.

FAIR VALUE MEASUREMENTS - Narrative (Details) $ in Millions, € in Billions	Jun. 30, 2026 USD ($)	Jun. 30, 2026 EUR (€)	Dec. 31, 2025 USD ($)	Jun. 01, 2025 USD ($)	Jun. 01, 2025 EUR (€)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt obligations, including the current portion	$ 37,189.6		$ 37,220.3
Net Investment Hedge
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Senior unsecured notes designated	5,400.0	€ 4.7		$ 5,300.0	€ 4.7
Estimate of Fair Value Measurement
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt, fair value	35,900.0		36,100.0
Level 1 \| Estimate of Fair Value Measurement
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt, fair value	31,300.0		32,900.0
Level 2 \| Estimate of Fair Value Measurement
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt, fair value	$ 4,600.0		$ 3,200.0

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

+ Details

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482881/825-10-55-10

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482881/825-10-55-12

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

+ Details

STOCK-BASED COMPENSATION - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 09, 2023	Dec. 31, 2022	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Jun. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Discount from market price (in percent)					15.00%
Stock-based compensation expense			$ 34.2	$ 47.3	$ 92.6	$ 100.7
2026 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issuable under stock incentive plan (in shares)			13,900,000		13,900,000
Stock Options and Time-Based Restricted Stock Units \| 2007 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years	3 years
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period					3 years
Unrecognized compensation expense			$ 9.9		$ 9.9
Expected weighted average recognition period					1 year
Awards granted (in shares)					100,692
Stock-based compensation expense			$ 8.8		$ 11.1
PSUs \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of potential target shares					0.00%
PSUs \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of potential target shares					200.00%
PSUs \| 2026 PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)					100,692
Weighted average grant date fair value (in dollars per share)			$ 211.01		$ 211.01
PSUs \| 2025 PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)							86,911
Weighted average grant date fair value (in dollars per share)				$ 286.21		$ 286.21
PSUs \| 2024 PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)								87,550
Weighted average grant date fair value (in dollars per share)									$ 216.11
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period					10 years
Unrecognized compensation expense			$ 0.0		$ 0.0
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense			$ 146.2		$ 146.2
Awards granted (in shares)					669,558
Restricted stock units \| Weighted Average
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected weighted average recognition period					2 years

BUSINESS SEGMENTS

6 Months Ended

Jun. 30, 2026

Segment Reporting [Abstract]

BUSINESS SEGMENTS

Property

Communications Sites and Related Communications Infrastructure—The Company’s primary business is leasing space on multitenant communications sites to wireless service providers, radio and television broadcast companies, wireless data providers, government agencies and municipalities and tenants in a number of other industries. The Company has historically reported these operations on a geographic basis.

Data Centers—The Company operates 30 data center facilities across eleven markets in the United States. The Company’s Data Centers segment relates to data center facilities and related assets that the Company owns and operates in the United States. The Data Centers segment offers different types of leased land, infrastructure and related services from, and requires different resources, skill sets and marketing strategies than the existing property operating segment in the U.S. & Canada.

As of June 30, 2026, the Company’s property operations consisted of the following:

•U.S. & Canada: property operations in Canada and the United States;

•Africa & APAC: property operations in Burkina Faso, Ghana, Kenya, Niger, Nigeria, South Africa and Uganda;

•Europe: property operations in France, Germany and Spain;

•Latin America: property operations in Argentina, Brazil, Chile, Colombia, Costa Rica, Mexico, Paraguay and Peru; and

•Data Centers: data center property operations in the United States.

Services

The Company’s Services segment offers tower-related services in the United States, including AZP, structural and mount analyses, and construction management services, together with program management offerings that support customer deployment needs from project scoping through construction. The Company’s services operations primarily support its

site leasing business, including the addition of new tenants and equipment on its communications sites. The Services segment is a strategic business unit that offers different services from, and requires different resources, skill sets and marketing strategies than, the property operating segments.

The accounting policies applied in compiling segment information below are similar to those described in note 1. Among other factors, in evaluating financial performance in each business segment, management uses segment gross margin and segment operating profit. The Company defines segment gross margin as segment revenue less segment operating expenses excluding Depreciation, amortization and accretion; Selling, general, administrative and development expense; and Other operating expenses. The Company defines segment operating profit as segment gross margin less Selling, general, administrative and development expense attributable to the segment, excluding stock-based compensation expense and corporate expenses. These measures of segment gross margin and segment operating profit are also before Interest income, Interest expense, Gain (loss) on retirement of long-term obligations, Other income (expense), Net income (loss) attributable to noncontrolling interests and Income tax benefit (provision). The categories of expenses indicated above, such as depreciation, have been excluded from segment operating performance as they are not considered in the review of information or the evaluation of results by management. The Company’s definition of segment operating profit aligns with the Company’s definition of Adjusted EBITDA. Adjusted EBITDA is widely used in the telecommunications real estate sector to measure operating performance as depreciation, amortization and accretion may vary significantly among companies depending upon accounting methods and useful lives, particularly where acquisitions and non-operating factors are involved.

The Company’s chief operating decision maker (the “CODM”) is the Company’s chief executive officer. The CODM uses segment gross margin and segment operating profit to evaluate the segments’ operating performance, in making capital allocation decisions, and in establishing management’s compensation. Additionally, the CODM uses these metrics to monitor budget versus actual results. There are no significant revenues resulting from transactions between the Company’s operating segments. All intercompany transactions are eliminated to reconcile segment results and assets to the consolidated statements of operations and consolidated balance sheets.

Summarized financial information concerning the Company’s reportable segments for the three and six months ended June 30, 2026 and 2025 is shown in the following tables. The “Other” column (i) represents amounts excluded from specific segments, such as business development operations, stock-based compensation expense and corporate expenses included in Selling, general, administrative and development expense; Other operating expenses; Interest income; Interest expense; Gain (loss) on retirement of long-term obligations; and Other income (expense), and (ii) reconciles segment operating profit to Income from continuing operations before income taxes.


	Property										Total Property		Services		Other		Total
Three Months Ended June 30, 2026	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers
Segment revenues	$	1,274.4	$	415.3	$	259.4	$	441.6	$	297.1	$	2,687.8	$	61.3			$	2,749.1
Segment operating expenses	220.4		146.8		96.1		130.8		113.8		707.9		33.4				741.3
Segment gross margin	1,054.0		268.5		163.3		310.8		183.3		1,979.9		27.9				2,007.8
Segment selling, general, administrative and development expense (1)	41.9		22.2		15.9		23.7		26.7		130.4		5.7				136.1
Segment operating profit	$	1,012.1	$	246.3	$	147.4	$	287.1	$	156.6	$	1,849.5	$	22.2			$	1,871.7
Stock-based compensation expense															$	34.2	34.2
Other selling, general, administrative and development expense															63.5		63.5
Depreciation, amortization and accretion															514.4		514.4
Other expense (2)															250.3		250.3
Income from continuing operations before income taxes																	$	1,009.3

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $34.2 million.

(2)Primarily includes interest expense, partially offset by gains from foreign currency exchange rate fluctuations. Three months ended June 30, 2026 also includes a net gain on the sales of ATC Philippines and the controlling interest in KTBL of $20.4 million.


	Property										Total Property		Services		Other		Total
Three Months Ended June 30, 2025	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers
Segment revenues	$	1,307.1	$	336.3	$	232.7	$	389.4	$	261.9	$	2,527.4	$	99.5			$	2,626.9
Segment operating expenses	222.2		104.5		86.6		124.4		102.9		640.6		48.1				688.7
Segment gross margin	1,084.9		231.8		146.1		265.0		159.0		1,886.8		51.4				1,938.2
Segment selling, general, administrative and development expense (1)	41.3		18.9		14.6		27.1		19.1		121.0		6.5				127.5
Segment operating profit	$	1,043.6	$	212.9	$	131.5	$	237.9	$	139.9	$	1,765.8	$	44.9			$	1,810.7
Stock-based compensation expense															$	47.3	47.3
Other selling, general, administrative and development expense															58.9		58.9
Depreciation, amortization and accretion															510.3		510.3
Other expense (2)															682.4		682.4
Income from continuing operations before income taxes																	$	511.8

_______________

(1) Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $47.3 million.

(2) Primarily includes interest expense and losses from foreign currency exchange rate fluctuations, partially offset by an unrealized gain from equity securities of $110.7 million.


	Property										Total Property		Services		Other		Total
Six Months Ended June 30, 2026	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers
Segment revenues	$	2,536.0	$	793.9	$	520.1	$	921.7	$	586.0	$	5,357.7	$	128.9			$	5,486.6
Segment operating expenses	426.7		266.9		188.6		264.6		225.9		1,372.7		71.9				1,444.6
Segment gross margin	2,109.3		527.0		331.5		657.1		360.1		3,985.0		57.0				4,042.0
Segment selling, general, administrative and development expense (1)	80.2		40.9		33.2		53.8		51.2		259.3		11.0				270.3
Segment operating profit	$	2,029.1	$	486.1	$	298.3	$	603.3	$	308.9	$	3,725.7	$	46.0			$	3,771.7
Stock-based compensation expense															$	92.6	92.6
Other selling, general, administrative and development expense															128.3		128.3
Depreciation, amortization and accretion															1,032.6		1,032.6
Other expense (2)															490.8		490.8
Income from continuing operations before income taxes																	$	2,027.4
Total assets	$	26,401.2	$	4,363.8	$	12,591.0	$	8,742.1	$	10,786.5	$	62,884.6	$	79.3	$	336.2	$	63,300.1
Capital expenditures	$	164.5	$	73.3	$	128.8	$	73.0	$	341.3	$	780.9	$	—	$	7.8	$	788.7

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $92.6 million.

(2)Primarily includes interest expense, partially offset by gains from foreign currency exchange rate fluctuations. Six months ended June 30, 2026 also includes a net gain on the sales of ATC Philippines and the controlling interest in KTBL of $20.4 million.


	Property										Total Property		Services		Other		Total
Six Months Ended June 30, 2025	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers
Segment revenues	$	2,605.4	$	669.9	$	445.7	$	788.6	$	506.0	$	5,015.6	$	174.1			$	5,189.7
Segment operating expenses	424.5		203.8		162.6		247.1		202.2		1,240.2		83.0				1,323.2
Segment gross margin	2,180.9		466.1		283.1		541.5		303.8		3,775.4		91.1				3,866.5
Segment selling, general, administrative and development expense (1)	80.6		39.0		30.4		48.1		42.0		240.1		12.9				253.0
Segment operating profit	$	2,100.3	$	427.1	$	252.7	$	493.4	$	261.8	$	3,535.3	$	78.2			$	3,613.5
Stock-based compensation expense															$	100.7	100.7
Other selling, general, administrative and development expense															117.5		117.5
Depreciation, amortization and accretion															1,002.8		1,002.8
Other expense (2)															1,263.2		1,263.2
Income from continuing operations before income taxes																	$	1,129.3
Total assets	$	26,889.9	$	4,234.9	$	12,884.5	$	8,372.4	$	10,705.3	$	63,087.0	$	139.0	$	528.5	$	63,754.5
Capital expenditures	$	160.5	$	99.8	$	106.5	$	57.9	$	224.3	$	649.0	$	—	$	3.9	$	652.9

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $100.7 million.

(2)Primarily includes interest expense and losses from foreign currency exchange rate fluctuations, partially offset by an unrealized gain from equity securities of $118.3 million and a gain on the sale of South Africa Fiber of $53.6 million.

- Definition

The entire disclosure for segment reporting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-40

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-42

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-34

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (ee)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-31

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26C

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26B

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-15

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-41

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-21

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-21

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 15: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 48
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-48

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 270
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482964/270-10-50-1

Reference 17: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 54
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-54

Reference 18: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-47

Reference 19: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 54
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-54

Reference 20: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-47

Reference 21: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 54
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-54

Reference 22: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-47

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/280/tableOfContent

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26

+ Details

BUSINESS SEGMENTS (Tables)

6 Months Ended

Jun. 30, 2026

Segment Reporting [Abstract]

Schedule of Summarized Financial Information Concerning the Company's Reportable Segments


	Property										Total Property		Services		Other		Total
Three Months Ended June 30, 2026	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers
Segment revenues	$	1,274.4	$	415.3	$	259.4	$	441.6	$	297.1	$	2,687.8	$	61.3			$	2,749.1
Segment operating expenses	220.4		146.8		96.1		130.8		113.8		707.9		33.4				741.3
Segment gross margin	1,054.0		268.5		163.3		310.8		183.3		1,979.9		27.9				2,007.8
Segment selling, general, administrative and development expense (1)	41.9		22.2		15.9		23.7		26.7		130.4		5.7				136.1
Segment operating profit	$	1,012.1	$	246.3	$	147.4	$	287.1	$	156.6	$	1,849.5	$	22.2			$	1,871.7
Stock-based compensation expense															$	34.2	34.2
Other selling, general, administrative and development expense															63.5		63.5
Depreciation, amortization and accretion															514.4		514.4
Other expense (2)															250.3		250.3
Income from continuing operations before income taxes																	$	1,009.3

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $34.2 million.


	Property										Total Property		Services		Other		Total
Three Months Ended June 30, 2025	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers
Segment revenues	$	1,307.1	$	336.3	$	232.7	$	389.4	$	261.9	$	2,527.4	$	99.5			$	2,626.9
Segment operating expenses	222.2		104.5		86.6		124.4		102.9		640.6		48.1				688.7
Segment gross margin	1,084.9		231.8		146.1		265.0		159.0		1,886.8		51.4				1,938.2
Segment selling, general, administrative and development expense (1)	41.3		18.9		14.6		27.1		19.1		121.0		6.5				127.5
Segment operating profit	$	1,043.6	$	212.9	$	131.5	$	237.9	$	139.9	$	1,765.8	$	44.9			$	1,810.7
Stock-based compensation expense															$	47.3	47.3
Other selling, general, administrative and development expense															58.9		58.9
Depreciation, amortization and accretion															510.3		510.3
Other expense (2)															682.4		682.4
Income from continuing operations before income taxes																	$	511.8

_______________

(1) Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $47.3 million.

(2) Primarily includes interest expense and losses from foreign currency exchange rate fluctuations, partially offset by an unrealized gain from equity securities of $110.7 million.


	Property										Total Property		Services		Other		Total
Six Months Ended June 30, 2026	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers
Segment revenues	$	2,536.0	$	793.9	$	520.1	$	921.7	$	586.0	$	5,357.7	$	128.9			$	5,486.6
Segment operating expenses	426.7		266.9		188.6		264.6		225.9		1,372.7		71.9				1,444.6
Segment gross margin	2,109.3		527.0		331.5		657.1		360.1		3,985.0		57.0				4,042.0
Segment selling, general, administrative and development expense (1)	80.2		40.9		33.2		53.8		51.2		259.3		11.0				270.3
Segment operating profit	$	2,029.1	$	486.1	$	298.3	$	603.3	$	308.9	$	3,725.7	$	46.0			$	3,771.7
Stock-based compensation expense															$	92.6	92.6
Other selling, general, administrative and development expense															128.3		128.3
Depreciation, amortization and accretion															1,032.6		1,032.6
Other expense (2)															490.8		490.8
Income from continuing operations before income taxes																	$	2,027.4
Total assets	$	26,401.2	$	4,363.8	$	12,591.0	$	8,742.1	$	10,786.5	$	62,884.6	$	79.3	$	336.2	$	63,300.1
Capital expenditures	$	164.5	$	73.3	$	128.8	$	73.0	$	341.3	$	780.9	$	—	$	7.8	$	788.7

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $92.6 million.


	Property										Total Property		Services		Other		Total
Six Months Ended June 30, 2025	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers
Segment revenues	$	2,605.4	$	669.9	$	445.7	$	788.6	$	506.0	$	5,015.6	$	174.1			$	5,189.7
Segment operating expenses	424.5		203.8		162.6		247.1		202.2		1,240.2		83.0				1,323.2
Segment gross margin	2,180.9		466.1		283.1		541.5		303.8		3,775.4		91.1				3,866.5
Segment selling, general, administrative and development expense (1)	80.6		39.0		30.4		48.1		42.0		240.1		12.9				253.0
Segment operating profit	$	2,100.3	$	427.1	$	252.7	$	493.4	$	261.8	$	3,535.3	$	78.2			$	3,613.5
Stock-based compensation expense															$	100.7	100.7
Other selling, general, administrative and development expense															117.5		117.5
Depreciation, amortization and accretion															1,002.8		1,002.8
Other expense (2)															1,263.2		1,263.2
Income from continuing operations before income taxes																	$	1,129.3
Total assets	$	26,889.9	$	4,234.9	$	12,884.5	$	8,372.4	$	10,705.3	$	63,087.0	$	139.0	$	528.5	$	63,754.5
Capital expenditures	$	160.5	$	99.8	$	106.5	$	57.9	$	224.3	$	649.0	$	—	$	3.9	$	652.9

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $100.7 million.

- Definition

Tabular disclosure of segment reporting. Includes, but is not limited to, reconciliation of reportable segment amount to corresponding consolidated total.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-31

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-34

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26C

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26B

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26A

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 25
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-25

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-15

+ Details

INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 30, 2026	Dec. 31, 2025
Income Tax Disclosure [Abstract]
Unrecognized tax benefits that would impact the ETR	$ 134.2	$ 134.2	$ 128.6
Unrecognized tax benefits, additions to existing tax positions	4.8	6.4
Unrecognized tax benefits, additions due to foreign exchange rate fluctuations	2.1	3.0
Unrecognized tax benefits, reduction of existing tax positions	2.1	2.1
Unrecognized tax benefits, reduction due to the lapse of statute of limitations	0.3	0.3
Unrecognized tax benefits, reduction due to settlements	1.4	1.4
Unrecognized tax benefits, income tax penalties and interest accrued	$ 103.0	$ 103.0	$ 86.8

LEASES - Schedule of Maturities Of Operating Leases (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Leases [Abstract]
Remainder of 2026	$ 533.2
2027	1,042.4
2028	1,001.9
2029	963.2
2030	915.9
Thereafter	7,479.5
Total lease payments	11,936.1
Less amounts representing interest	(4,145.8)
Total lease liability	7,790.3	$ 7,743.6
Less current portion of lease liability	644.1	584.9
Non-current lease liability	$ 7,146.2	$ 7,158.7

FAIR VALUE MEASUREMENTS

6 Months Ended

Jun. 30, 2026

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

The Company determines the fair value of its financial instruments based on the fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Below are the three levels of inputs that may be used to measure fair value:


			Level 1			Quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.

			Level 2			Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

			Level 3			Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Items Measured at Fair Value on a Recurring Basis—The fair values of the Company’s financial assets and liabilities that are required to be measured on a recurring basis at fair value were as follows:


	June 30, 2026					December 31, 2025
	Fair Value Measurements Using					Fair Value Measurements Using
	Level 1		Level 2		Level 3	Level 1		Level 2		Level 3
Assets:

Investments in equity securities (1)	$	18.8	$	194.5	—	$	15.3	$	161.6	—

_______________

(1)Investments in equity securities are recorded in Notes receivable and other non-current assets in the consolidated balance sheets at fair value. Unrealized holding gains and losses for equity securities are recorded in Other income (expense) in the consolidated statements of operations in the current period. During three and six months ended June 30, 2026, the Company recognized unrealized gains of $12.0 million and $36.4 million, respectively, for equity securities held as of June 30, 2026. During three and six months ended June 30, 2025, the Company recognized unrealized gains of $110.7 million and $118.3 million, respectively, for equity securities held as of June 30, 2025.

Items Measured at Fair Value on a Nonrecurring Basis

Assets Held and Used—The Company’s long-lived assets are recorded at amortized cost and, if impaired, are adjusted to fair value using Level 3 inputs. The significant unobservable inputs used to determine the fair value of long-lived assets during the three and six months ended June 30, 2026 or 2025 are consistent with those described in note 10 to the consolidated financial statements included in the 2025 Form 10-K.

There were no other items measured at fair value on a nonrecurring basis during the six months ended June 30, 2026 or 2025.

Fair Value of Financial Instruments—The Company’s financial instruments for which the carrying value reasonably approximates fair value at June 30, 2026 and December 31, 2025 include cash and cash equivalents, restricted cash, accounts receivable and accounts payable. The Company’s estimates of fair value of its long-term obligations, including the current portion, are based primarily upon reported market values. For long-term debt not actively traded, fair value is estimated using either indicative price quotes or a discounted cash flow analysis using rates for debt with similar terms and maturities. As of June 30, 2026 and December 31, 2025, the carrying value of long-term obligations, including the current portion, was $37.2 billion and $37.2 billion, respectively. As of June 30, 2026, the fair value of long-term obligations, including the current portion, was $35.9 billion, of which $31.3 billion was measured using Level 1 inputs and $4.6 billion was measured using Level 2 inputs. As of December 31, 2025, the fair value of long-term obligations, including the current portion, was $36.1 billion, of which $32.9 billion was measured using Level 1 inputs and $3.2 billion was measured using Level 2 inputs.

Net Investment Hedge

Foreign Currency Debt—On June 1, 2025, the Company designated approximately 4.7 billion EUR (approximately $5.3 billion at the designation date) of senior unsecured notes as a non-derivative net investment hedge on the Company’s net investments in its European subsidiaries, whose functional currency is the EUR, to mitigate against the effect of exchange rate fluctuations on the translation of foreign currency balances to the USD.

The following table presents the contractual amounts of the Company's outstanding instruments:


		As of
	Designation	June 30, 2026		December 31, 2025
Foreign currency-denominated debt (1)	Net Investment Hedge	$	5,368.4	$	5,461.6

_______________

(1)During the three and six months ended June 30, 2026 and 2025, the Company recorded $61.4 million, $(204.6) million, $151.0 million and $(204.6) million, respectively, of unrealized foreign currency gains (losses) related to the EUR denominated debt that was designated as a net investment hedge as a foreign currency translation adjustment in Accumulated other comprehensive loss. As of June 30, 2026, includes 4.7 billion EUR ($5.4 billion) of outstanding EUR denominated debt designated as hedges of a portion of the Company’s net investment in foreign operations. This debt matures in fiscal years 2027 through 2034.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 107
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-107

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 940
-SubTopic 820
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478119/940-820-50-1

+ Details

LEASES - Schedule of Future Minimum Rental Receipts Expected Under Operating Leases (Details) $ in Millions	Jun. 30, 2026 USD ($)
Leases [Abstract]
Remainder of 2026	$ 4,443.4
2027	8,752.6
2028	7,338.1
2029	6,854.6
2030	5,541.6
Thereafter	16,965.3
Total	$ 49,895.6

LONG-TERM OBLIGATIONS - Bank Facilities (Details) € in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2026 USD ($)	Jun. 30, 2026 EUR (€)	Jun. 30, 2025 USD ($)	May 21, 2026	May 07, 2026 USD ($)	May 06, 2026 USD ($)	Apr. 14, 2026	Feb. 13, 2026	Dec. 31, 2025
Line of Credit Facility [Line Items]
Borrowings under credit facilities	$ 3,601.1		$ 3,632.3
American Tower Corporation \| 2021 Term Loan \| Unsecured debt
Line of Credit Facility [Line Items]
Aggregate principal amount					$ 1,000.0
Maximum adjusted EBITDA					3.5
American Tower Corporation \| 1.950% senior notes \| Senior notes
Line of Credit Facility [Line Items]
Debt interest rate (as a percent)				1.95%					1.95%
American Tower Corporation \| 4.400% senior notes \| Senior notes
Line of Credit Facility [Line Items]
Debt interest rate (as a percent)								4.40%	4.40%
American Tower Corporation \| 1.600% senior notes \| Senior notes
Line of Credit Facility [Line Items]
Debt interest rate (as a percent)							1.60%		1.60%
American Tower Corporation \| Revolving Credit Facility \| 2021 Multicurrency Credit Facility
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity					$ 6,000.0
Maximum adjusted EBITDA					3.5
Borrowings under credit facilities	2,300.0
Repayment under credit facilities	1,600.0
American Tower Corporation \| Revolving Credit Facility \| 2021 Multicurrency Credit Facility \| Acquisition-Related Loans
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity					$ 5,000.0
American Tower Corporation \| Revolving Credit Facility \| 2021 Multicurrency Credit Facility \| Foreign lne of credit
Line of Credit Facility [Line Items]
Borrowings under credit facilities	581.1	€ 500.0
Repayment under credit facilities	581.1	€ 500.0
American Tower Corporation \| Revolving Credit Facility \| 2021 Credit Facility
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity					$ 4,000.0
Maximum adjusted EBITDA					3.5
Borrowings under credit facilities	1,300.0
Repayment under credit facilities	$ 600.0
American Tower Corporation \| Bridge Loan \| 2021 Multicurrency Credit Facility
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity					$ 100.0	$ 50.0
American Tower Corporation \| Bridge Loan \| 2021 Credit Facility
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity					$ 100.0	$ 50.0

GOODWILL AND OTHER INTANGIBLE ASSETS - Expected Future Amortization Expenses (Details) $ in Millions	Jun. 30, 2026 USD ($)
Intangible Asset, Goodwill and Other [Abstract]
Remainder of 2026	$ 426.9
2027	830.5
2028	821.0
2029	804.1
2030	792.2
2031	$ 787.2

LONG-TERM OBLIGATIONS - Offerings of Senior Notes (Details) € in Millions, $ in Millions			6 Months Ended
	May 27, 2026 USD ($)	May 27, 2026 EUR (€)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	May 27, 2026 EUR (€)
Debt Instrument [Line Items]
Proceeds from issuance of senior notes			$ 872.2	$ 1,560.0
American Tower Corporation \| Senior notes \| 4.000% Senior Notes due 2033
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.00%		4.00%		4.00%
Aggregate principal amount	$ 872.0		$ 872.0		€ 750.0
Proceeds from issuance of senior notes	$ 863.5	€ 742.7
Maximum adjusted EBITDA			3.5
American Tower Corporation \| Senior notes \| 4.000% Senior Notes due 2033 \| Debt Instrument, Redemption Option Two
Debt Instrument [Line Items]
Redemption price percentage	101.00%	101.00%

GOODWILL AND OTHER INTANGIBLE ASSETS - Other Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Intangible Asset, Finite-Lived [Line Items]
Gross Carrying Value	$ 25,341.1	$ 25,480.9
Accumulated Amortization	(11,360.5)	(10,950.2)
Net Book Value	13,980.6	14,530.7
Acquired network location intangibles
Intangible Asset, Finite-Lived [Line Items]
Gross Carrying Value	5,489.1	5,511.3
Accumulated Amortization	(2,858.9)	(2,798.4)
Net Book Value	$ 2,630.2	2,712.9
Acquired network location intangibles \| Maximum
Intangible Asset, Finite-Lived [Line Items]
Estimated Useful Lives (years)	30 years
Acquired tenant-related intangibles
Intangible Asset, Finite-Lived [Line Items]
Gross Carrying Value	$ 18,527.6	18,636.8
Accumulated Amortization	(7,902.6)	(7,609.3)
Net Book Value	$ 10,625.0	11,027.5
Acquired tenant-related intangibles \| Maximum
Intangible Asset, Finite-Lived [Line Items]
Estimated Useful Lives (years)	30 years
Acquired licenses and other intangibles
Intangible Asset, Finite-Lived [Line Items]
Gross Carrying Value	$ 1,324.4	1,332.8
Accumulated Amortization	(599.0)	(542.5)
Net Book Value	$ 725.4	$ 790.3
Acquired licenses and other intangibles \| Minimum
Intangible Asset, Finite-Lived [Line Items]
Estimated Useful Lives (years)	2 years
Acquired licenses and other intangibles \| Maximum
Intangible Asset, Finite-Lived [Line Items]
Estimated Useful Lives (years)	30 years

LONG-TERM OBLIGATIONS

6 Months Ended

Jun. 30, 2026

Debt Disclosure [Abstract]

LONG-TERM OBLIGATIONS

Outstanding amounts under the Company’s long-term obligations, reflecting discounts, premiums and debt issuance costs, consisted of the following:


	As of
	June 30, 2026		December 31, 2025		Maturity Date
2021 Multicurrency Credit Facility (1)	$	1,085.0	$	380.0	May 1, 2029
2021 Term Loan (1)	997.9		998.1		May 1, 2029
2021 Credit Facility (1)	695.0		—		May 1, 2031
4.400% senior notes (2)	—		499.9		N/A
1.600% senior notes (3)	—		699.7		N/A
1.950% senior notes (4)	—		586.9		N/A
1.450% senior notes (5)	599.7		598.9		September 15, 2026
3.375% senior notes (5)	999.4		998.5		October 15, 2026
3.125% senior notes (5)	399.8		399.6		January 15, 2027
2.750% senior notes (5)	749.4		749.0		January 15, 2027
0.450% senior notes (5) (6)	856.0		879.7		January 15, 2027
0.400% senior notes (5) (6)	570.4		585.8		February 15, 2027
3.650% senior notes (5)	648.8		648.0		March 15, 2027


4.125% senior notes (5) (6) (7)	399.2		703.1		May 16, 2027
3.55% senior notes	749.1		748.7		July 15, 2027
3.600% senior notes	698.4		697.9		January 15, 2028
0.500% senior notes (6)	854.7		878.3		January 15, 2028
1.500% senior notes	648.9		648.5		January 31, 2028
5.500% senior notes	697.2		696.5		March 15, 2028
5.250% senior notes	647.1		646.4		July 15, 2028
5.800% senior notes	746.5		745.9		November 15, 2028
5.200% senior notes	645.8		645.1		February 15, 2029
3.950% senior notes	596.6		596.0		March 15, 2029
0.875% senior notes (6)	854.4		878.2		May 21, 2029
3.800% senior notes	1,643.4		1,642.4		August 15, 2029
2.900% senior notes	746.5		746.0		January 15, 2030
5.000% senior notes	595.1		594.4		January 31, 2030
4.900% senior notes	848.2		848.0		March 15, 2030
3.900% senior notes (6)	567.6		583.3		May 16, 2030
2.100% senior notes	745.7		745.2		June 15, 2030
0.950% senior notes (6)	567.3		583.1		October 5, 2030
1.875% senior notes	795.7		795.2		October 15, 2030
2.700% senior notes	696.6		696.3		April 15, 2031
4.625% senior notes (6)	566.4		582.2		May 16, 2031
2.300% senior notes	694.9		694.5		September 15, 2031
1.000% senior notes (6)	738.2		758.8		January 15, 2032
4.050% senior notes	644.8		644.4		March 15, 2032
3.625% senior notes (6)	567.9		583.9		May 30, 2032
4.700% senior notes	840.9		840.4		December 15, 2032
5.650% senior notes	792.8		792.3		March 15, 2033
1.250% senior notes (6)	566.4		582.4		May 21, 2033
5.550% senior notes	842.6		842.2		July 15, 2033
4.000% senior notes (6)	848.3		—		September 1, 2033
5.900% senior notes	743.2		742.9		November 15, 2033
5.450% senior notes	641.9		641.5		February 15, 2034
4.100% senior notes (6)	564.9		580.8		May 16, 2034
5.400% senior notes	592.9		592.5		January 31, 2035
5.350% senior notes	731.1		731.4		March 15, 2035
3.700% senior notes	592.9		592.8		October 15, 2049
3.100% senior notes	1,039.3		1,039.1		June 15, 2050
2.950% senior notes	1,024.9		1,024.5		January 15, 2051
Total American Tower Corporation debt	35,379.7		35,409.2

Series 2018-1A securities (8)	498.7		498.3		March 15, 2028
Series 2023-1A securities (9)	1,293.6		1,291.7		March 15, 2028
Other subsidiary debt (10)	3.2		5.2		Various
Total American Tower subsidiary debt	1,795.5		1,795.2
Finance lease obligations	14.4		15.9
Total	37,189.6		37,220.3
Less current portion of long-term obligations	(5,226.5)		(3,387.8)
Long-term obligations	$	31,963.1	$	33,832.5

_______________

(1)Accrues interest at a variable rate.

(2)Repaid in full on February 13, 2026 using borrowings under the 2021 Credit Facility (as defined below) and cash on hand.

(3)Repaid in full on April 14, 2026 using borrowings under the 2021 Credit Facility and cash on hand.

(4)Repaid in full on May 21, 2026 using borrowings under the 2021 Multicurrency Credit Facility.

(5)Included in Current portion of long-term obligations.

(6)Notes are denominated in Euro (“EUR”).

(7)Partially redeemed on June 18, 2026 using proceeds from the issuance of the 4.000% Notes (as defined below).

(8)Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2048.

(9)Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2053.

Securitized Debt—Cash flows generated by the communications sites that secure the securitized debt of the Company are only available for payment of such debt and related costs and are not available to pay the Company’s other obligations or the claims of its creditors. However, subject to certain restrictions, the Company holds the right to receive the excess cash flows not needed to service the securitized debt and other obligations arising out of the securitizations. The securitized debt is the obligation of the issuers thereof or borrowers thereunder, as applicable, and their subsidiaries, and not of the Company or its other subsidiaries.

Repayments of Senior Notes

Repayment of 4.400% Senior Notes—On February 13, 2026, the Company repaid $500.0 million aggregate principal amount of the Company’s 4.400% senior unsecured notes due 2026 (the “4.400% Notes”) upon their maturity. The 4.400% Notes were repaid using borrowings under the 2021 Credit Facility and cash on hand. Upon completion of the repayment, none of the 4.400% Notes remained outstanding.

Repayment of 1.600% Senior Notes—On April 14, 2026, the Company repaid $700.0 million aggregate principal amount of the Company’s 1.600% senior unsecured notes due 2026 (the “1.600% Notes”) upon their maturity. The 1.600% Notes were repaid using borrowings under the 2021 Credit Facility and cash on hand. Upon completion of the repayment, none of the 1.600% Notes remained outstanding.

Repayment of 1.950% Senior Notes—On May 21, 2026, the Company repaid 500.0 million EUR aggregate principal amount of the Company’s 1.950% senior unsecured notes due 2026 (the “1.950% Notes”) upon their maturity. The 1.950% Notes were repaid using borrowings under the 2021 Multicurrency Credit Facility. Upon completion of the repayment, none of the 1.950% Notes remained outstanding.

Partial Redemption of 4.125% Senior Notes—On June 18, 2026, the Company redeemed 250.0 million EUR of its 4.125% senior unsecured notes due 2027 (the “4.125% Notes”) at a price equal to 100.969%, plus accrued and unpaid interest up to, but excluding June 18, 2026, for an aggregate redemption price of approximately 253.3 million EUR (approximately $290.2 million as of the repayment date), including 0.9 million EUR (approximately $1.0 million as of the repayment date) in accrued and unpaid interest. The Company recorded a loss on retirement of long-term obligations of approximately $3.2 million, which included prepayment consideration of $2.8 million and the associated unamortized discount and deferred financing costs. The redemption was funded with proceeds from the issuance of the 4.000% Notes. Upon completion of this partial redemption, 350.0 million EUR aggregate principal amount of the 4.125% Notes remained outstanding.

Offerings of Senior Notes

4.000% Senior Notes Offering—On May 27, 2026, the Company completed a registered public offering of 750.0 million EUR (approximately $872.0 million at the date of issuance) aggregate principal amount of 4.000% senior unsecured notes due 2033 (the “4.000% Notes”). The net proceeds from this offering were approximately 742.7 million EUR (approximately $863.5 million at the date of issuance), after deducting commissions and estimated expenses. The Company used the net proceeds to repay existing indebtedness under the 2021 Multicurrency Credit Facility and to partially redeem the 4.125% Notes (as discussed above).

The key terms of the 4.000% Notes are as follows:

Senior Notes

Aggregate Principal Amount (in millions)

Issue Date and Interest Accrual Date

Maturity Date

Contractual Interest Rate

First Interest Payment

Interest Payments Due (1)

Par Call Date (2)

4.000% Notes (3)

872.0

May 27, 2026

September 1, 2033

4.000%

September 1, 2026

September 1

July 1, 2033

___________

(3)The 4.000% Notes are denominated in EUR; dollar amounts represent the aggregate principal amount at the issuance date.

If the Company undergoes a change of control and corresponding ratings decline, each as defined in the supplemental indenture for the 4.000% Notes, the Company may be required to repurchase all of the 4.000% Notes at a purchase price equal to 101% of the aggregate principal amount of the 4.000% Notes repurchased, plus accrued and unpaid interest (including additional interest, if any), up to but not including the repurchase date. The 4.000% Notes rank equally in right of payment with all of the Company’s other senior unsecured debt obligations and are structurally subordinated to all existing and future indebtedness and other obligations of its subsidiaries.

The supplemental indenture contains certain covenants that restrict the Company’s ability to merge, consolidate or sell assets and its (together with its subsidiaries’) ability to incur liens. These covenants are subject to a number of exceptions, including that the Company and its subsidiaries may incur certain liens on assets, mortgages or other liens securing indebtedness if the aggregate amount of indebtedness secured by such liens does not exceed 3.5x Adjusted EBITDA, as defined in the supplemental indenture.

Bank Facilities

Amendments to Bank Facilities—On May 7, 2026, the Company amended its (i) $6.0 billion senior unsecured multicurrency revolving credit facility, as amended and restated on December 8, 2021, as further amended, (the “2021 Multicurrency Credit Facility”), (ii) $4.0 billion senior unsecured revolving credit facility, as amended and restated on December 8, 2021, as further amended, (the “2021 Credit Facility”) and (iii) $1.0 billion unsecured term loan, as amended and restated on December 8, 2021, as further amended (the “2021 Term Loan” collectively with the 2021 Multicurrency Credit Facility and the 2021 Credit Facility, the “Loans”).

These amendments, among other things,

i.extend the maturity dates of the 2021 Multicurrency Credit Facility, the 2021 Credit Facility and the 2021 Term Loan to May 1, 2029, May 1, 2031 and May 1, 2029, respectively;

ii.include limited conditionality provisions in the 2021 Multicurrency Credit Facility, permitting the Company to borrow up to $5.0 billion in connection with certain acquisitions subject to such limited conditionality provisions;

iii.increase the swingline sublimit under each of the 2021 Multicurrency Credit Facility and the 2021 Credit Facility from $50.0 million to $100.0 million;

iv.amend the covenant governing the incurrence of liens under each of the Loans to permit the incurrence of liens securing indebtedness in an aggregate amount not to exceed the 3.5x ratio of Senior Secured Debt to Adjusted EBITDA (each as defined in each of the Loans); and

v.amend the covenant governing the incurrence of indebtedness under each of the Loans to restrict the incurrence of indebtedness to subsidiaries of the Company only.

2021 Multicurrency Credit Facility—During the six months ended June 30, 2026, the Company borrowed an aggregate of $2.3 billion, including 500.0 million EUR ($581.1 million as of the borrowing date) and repaid an aggregate of $1.6 billion, including 500.0 million EUR ($581.1 million as of the repayment date) of revolving indebtedness under the 2021 Multicurrency Credit Facility. The Company used the borrowings to repay outstanding indebtedness, including the 1.950% Notes, and for general corporate purposes.

2021 Credit Facility—During the six months ended June 30, 2026, the Company borrowed an aggregate of $1.3 billion and repaid an aggregate of $0.6 billion of revolving indebtedness under the 2021 Credit Facility. The Company used the borrowings to repay outstanding indebtedness, including the 4.400% Notes and the 1.600% Notes, and for general corporate purposes.

As of June 30, 2026, the key terms under the Loans were as follows:


	Outstanding Principal Balance (in millions)		Undrawn letters of credit (in millions)		Maturity Date		Current margin over SOFR or EURIBOR (1)		Current commitment fee (2)
2021 Multicurrency Credit Facility	$	1,085.0	$	18.7	May 1, 2029	(3)	0.875	%	0.100	%
2021 Credit Facility	695.0		20.7		May 1, 2031	(3)	0.875	%	0.100	%
2021 Term Loan	1,000.0		N/A		May 1, 2029		0.875	%	N/A

_______________

(2)Fee on undrawn portion of each credit facility.

(3)Subject to two optional renewal periods.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-8

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-9

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 24: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 470
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/470/tableOfContent

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1C
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1C
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C

Reference 31: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1C
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C

Reference 32: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E

Reference 33: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

Reference 34: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

Reference 35: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

+ Details

COVER - shares	6 Months Ended
COVER - shares	Jun. 30, 2026	Jul. 21, 2026
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2026
Document Transition Report	false
Entity File Number	001-14195
Entity Registrant Name	AMERICAN TOWER CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	65-0723837
Entity Address, Address Line One	222 Berkeley Street
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02116
City Area Code	617
Local Phone Number	375-7500
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		465,960,048
Entity Central Index Key	0001053507
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q2
Amendment Flag	false
Common Stock, $0.01 par value
Document Information [Line Items]
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	AMT
Security Exchange Name	NYSE
0.450% Senior Notes due 2027
Document Information [Line Items]
Title of 12(b) Security	0.450% Senior Notes due 2027
Trading Symbol	AMT 27C
Security Exchange Name	NYSE
0.400% Senior Notes due 2027
Document Information [Line Items]
Title of 12(b) Security	0.400% Senior Notes due 2027
Trading Symbol	AMT 27D
Security Exchange Name	NYSE
4.125% Senior Notes Due 2027
Document Information [Line Items]
Title of 12(b) Security	4.125% Senior Notes due 2027
Trading Symbol	AMT 27F
Security Exchange Name	NYSE
0.500% Senior Notes due 2028
Document Information [Line Items]
Title of 12(b) Security	0.500% Senior Notes due 2028
Trading Symbol	AMT 28A
Security Exchange Name	NYSE
0.875% Senior Notes due 2029
Document Information [Line Items]
Title of 12(b) Security	0.875% Senior Notes due 2029
Trading Symbol	AMT 29B
Security Exchange Name	NYSE
0.950% Senior Notes due 2030
Document Information [Line Items]
Title of 12(b) Security	0.950% Senior Notes due 2030
Trading Symbol	AMT 30C
Security Exchange Name	NYSE
3.900% Senior Notes due 2030
Document Information [Line Items]
Title of 12(b) Security	3.900% Senior Notes due 2030
Trading Symbol	AMT 30D
Security Exchange Name	NYSE
4.625% Senior Notes due 2031
Document Information [Line Items]
Title of 12(b) Security	4.625% Senior Notes due 2031
Trading Symbol	AMT 31B
Security Exchange Name	NYSE
1.000% Senior Notes due 2032
Document Information [Line Items]
Title of 12(b) Security	1.000% Senior Notes due 2032
Trading Symbol	AMT 32
Security Exchange Name	NYSE
3.625% Senior Notes due 2032
Document Information [Line Items]
Title of 12(b) Security	3.625% Senior Notes due 2032
Trading Symbol	AMT 32B
Security Exchange Name	NYSE
1.250% Senior Notes due 2033
Document Information [Line Items]
Title of 12(b) Security	1.250% Senior Notes due 2033
Trading Symbol	AMT 33
Security Exchange Name	NYSE
4.000% Senior Notes due 2033
Document Information [Line Items]
Title of 12(b) Security	4.000% Senior Notes due 2033
Trading Symbol	AMT 33D
Security Exchange Name	NYSE
4.100% Senior Notes due 2034
Document Information [Line Items]
Title of 12(b) Security	4.100% Senior Notes due 2034
Trading Symbol	AMT 34A
Security Exchange Name	NYSE

LEASES - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ (613.4)	$ (574.5)
Non-cash items:
New operating leases	78.8	97.9
Operating lease modifications and reassessments	$ 229.1	$ 198.7

STOCK-BASED COMPENSATION

6 Months Ended

Jun. 30, 2026

Share-Based Payment Arrangement [Abstract]

STOCK-BASED COMPENSATION

Summary of Stock-Based Compensation Plans—The Company maintains an equity incentive plan that provides for the grant of stock-based awards to its directors, officers and employees. Until May 20, 2026, the Company’s 2007 Equity Incentive Plan, as amended (the “2007 Plan”), provided for the grant of non-qualified and incentive stock options, as well as restricted stock units, restricted stock and other stock-based awards. The Company’s 2026 Equity Incentive Plan (the “2026 Plan”) was approved by the Company’s stockholders on May 20, 2026, replacing the 2007 Plan, and provides for the grant of equity and equity-based awards, including options (including nonqualified stock options and incentive stock options), restricted stock, restricted stock units and other equity-based awards and cash awards, to employees, directors, consultants and advisors of the Company and its majority-owned subsidiaries.

Exercise prices for non-qualified and incentive stock options are not less than the fair value of the underlying common stock on the date of grant. Equity awards typically vest ratably. Awards granted prior to March 10, 2023 generally vest over four years for time-based restricted stock units (“RSUs”) and stock options. In December 2022, the Company’s Compensation and Human Capital Committee (the “Compensation Committee”) changed the terms of its awards to generally vest over three years. The change in vesting terms is applicable for new awards granted beginning on March 10, 2023 and does not change the vesting terms applicable to grants awarded prior to March 10, 2023. Performance-based restricted stock units (“PSUs”) generally vest over three years. Stock options generally expire ten years from the date of grant. As of June 30, 2026, the Company had the ability to grant stock-based awards with respect to an aggregate of 13.9 million shares of common stock under the 2026 Plan. In addition, the Company maintains an employee stock purchase plan (the “ESPP”) pursuant to which eligible employees may purchase shares of the Company’s common stock on the last day of each bi-annual offering period at a 15% discount from the lower of the closing market value on the first or last day of such offering period. The offering periods run from June 1 through November 30 and from December 1 through May 31 of each year.

During the six months ended June 30, 2026 and 2025, the Company recorded the following stock-based compensation expense in selling, general, administrative and development expense:


	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
Stock-based compensation expense (1)	$	34.2	$	47.3	$	92.6	$	100.7

_______________

Stock Options—As of June 30, 2026, there was no unrecognized compensation expense related to unvested stock options.

The Company’s option activity for the six months ended June 30, 2026 was as follows (shares disclosed in full amounts):


						Number of Options
Outstanding as of January 1, 2026						133,623

Exercised						(133,623)
Forfeited						—
Expired						—
Outstanding as of June 30, 2026						—

Restricted Stock Units—As of June 30, 2026, total unrecognized compensation expense related to unvested RSUs granted under the 2007 Plan and the 2026 Plan was $146.2 million and is expected to be recognized over a weighted average period of approximately two years. Vesting of RSUs is subject generally to the employee’s continued employment or death, disability or qualified retirement (each as defined in the applicable RSU award agreement). RSUs will accrue dividend equivalents prior to vesting, which will be paid out only in respect of shares that actually vest.

Performance-Based Restricted Stock Units—During the six months ended June 30, 2026, the Compensation Committee granted an aggregate of 100,692 PSUs (the “2026 PSUs”) to its executive officers and established the performance and market metrics for these awards. During the years ended December 31, 2025 and 2024, the Compensation Committee granted an aggregate of 86,911 PSUs (the “2025 PSUs”) and 87,550 PSUs (the “2024 PSUs”), respectively, to its executive officers and established the performance metrics for these awards. Threshold, target and maximum parameters were established for the metrics for a three-year performance period with respect to each of the 2026 PSUs, the 2025 PSUs and the 2024 PSUs and will be used to calculate the number of shares that will be issuable when each award vests, which may range from zero to 200% of the target amounts. At the end of each three-year performance period, the number of shares that vest will depend on the degree of achievement against the pre-established goals. PSUs will be paid out in common stock at the end of each performance period, subject generally to the executive’s continued employment or death, disability or qualified retirement (each as defined in the applicable PSU award agreement). PSUs will accrue dividend equivalents prior to vesting, which will be paid out only in respect of shares that actually vest.

Certain of the 2026 PSUs, the 2025 PSUs and the 2024 PSUs include a market condition component based on relative total shareholder return as measured against the REIT constituents included in the S&P 500 Index. For the component of the 2026 PSUs, the 2025 PSUs and the 2024 PSUs subject to a market condition, fair value is determined using a Monte Carlo simulation model, which uses multiple input variables to determine the probability of satisfying the market condition requirements. The grant date fair value of the market condition component of the 2026 PSUs, the 2025 PSUs and the 2024 PSUs is $211.01, $286.21 and $216.11, respectively.

Key assumptions used to apply this pricing model were as follows:


	2026		2025		2024

Expected term (years)	2.81		2.81		2.81
Risk-free interest rate	3.58	%	3.91	%	4.31	%
Annualized volatility	25.42	%	27.91	%	26.75	%

Restricted Stock Units and Performance-Based Restricted Stock Units—The Company’s RSU and PSU activity for the six months ended June 30, 2026 was as follows (shares disclosed in full amounts):


	RSUs	PSUs
Outstanding as of January 1, 2026 (1)	1,283,669	333,401
Granted (2)	669,558	100,692
Vested and Released (3)	(728,102)	(169,098)
Forfeited	(25,751)	—
Outstanding as of June 30, 2026	1,199,374	264,995
Vested and deferred as of June 30, 2026 (4)	20,358	—

_______________

(2)PSUs consist of the target number of shares issuable at the end of the three-year performance period for the 2026 PSUs, or 100,692 shares.

(3)PSUs consist of shares vested pursuant to the 2023 PSUs. There are no additional shares to be earned related to the 2023 PSUs.

(4)Vested and deferred RSUs are related to deferred compensation for certain former employees.

During the three and six months ended June 30, 2026, the Company recorded $8.8 million and $11.1 million in stock-based compensation expense for equity awards in which the performance goals have been established and were probable of being achieved. The remaining unrecognized compensation expense related to these awards at June 30, 2026 was $9.9 million based on the Company’s current assessment of the probability of achieving the performance goals. The weighted average period over which the cost will be recognized is approximately one year.

GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in the Carrying Value of Goodwill (Details) $ in Millions	6 Months Ended
	Jun. 30, 2026 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 12,255.5
Effect of foreign currency translation	(74.0)
Goodwill, ending balance	12,181.5
U.S. & Canada
Goodwill [Roll Forward]
Goodwill, beginning balance	4,636.8
Effect of foreign currency translation	(1.6)
Goodwill, ending balance	4,635.2
Africa & APAC
Goodwill [Roll Forward]
Goodwill, beginning balance	521.9
Effect of foreign currency translation	(5.1)
Goodwill, ending balance	516.8
Europe
Goodwill [Roll Forward]
Goodwill, beginning balance	3,247.3
Effect of foreign currency translation	(89.4)
Goodwill, ending balance	3,157.9
Latin America
Goodwill [Roll Forward]
Goodwill, beginning balance	927.5
Effect of foreign currency translation	22.1
Goodwill, ending balance	949.6
Data Centers
Goodwill [Roll Forward]
Goodwill, beginning balance	2,920.0
Effect of foreign currency translation	0.0
Goodwill, ending balance	2,920.0
Services
Goodwill [Roll Forward]
Goodwill, beginning balance	2.0
Effect of foreign currency translation	0.0
Goodwill, ending balance	$ 2.0

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References

+ Details

COMMITMENTS AND CONTINGENCIES	6 Months Ended
COMMITMENTS AND CONTINGENCIES	Jun. 30, 2026
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Litigation— The Company periodically becomes involved in various claims and lawsuits that are incidental to its business. While the Company’s management, after consultation with counsel, currently believes the ultimate outcome of these legal proceedings, individually and in the aggregate, will not have a material adverse impact on its consolidated financial position, results of operations or liquidity, litigation is subject to inherent uncertainties. Were an unfavorable ruling to occur, there exists the possibility of a material adverse impact on the Company’s financial condition and results of operations. Verizon Transaction—In March 2015, the Company entered into an agreement with various operating entities of Verizon Communications Inc. (“Verizon”) that currently provides for the lease, sublease or management of approximately 11,100 wireless communications sites, which commenced on March 27, 2015. The average term of the lease or sublease for all communications sites at the inception of the agreement was approximately 28 years, assuming renewals or extensions of the underlying ground leases for the sites. The Company has the option to purchase the leased sites in tranches, subject to the applicable lease, sublease or management rights upon its scheduled expiration. Each tower is assigned to an annual tranche, ranging from 2034 to 2047, which represents the outside expiration date for the sublease rights to the towers in that tranche. The purchase price for each tranche is a fixed amount stated in the lease for such tranche plus the fair market value of certain alterations made to the related towers. The aggregate purchase option price for the towers leased and subleased is approximately $5.0 billion. Verizon occupied the sites as a tenant for an initial term of ten years and has exercised its first renewal option for a five-year term. Verizon has seven optional successive five-year terms remaining; each such term shall be governed by standard master lease agreement terms established as a part of the transaction. AT&T Transaction—The Company has an agreement with SBC Communications Inc., a predecessor entity to AT&T Inc. (“AT&T”), that currently provides for the lease or sublease of approximately 1,500 towers, which commenced between December 2000 and August 2004. Substantially all of the towers are part of the securitization transactions completed in March 2018 and March 2023 (together, the “Trust Securitization”). The average term of the lease or sublease for all sites at the inception of the agreement was approximately 27 years, assuming renewals or extensions of the underlying ground leases for the sites. The Company has the option to purchase the sites subject to the applicable lease or sublease upon its expiration. Each tower is assigned to an annual tranche, ranging from 2013 to 2032, which represents the outside expiration date for the sublease rights to that tower. The purchase price for each site is a fixed amount stated in the lease for that site plus the fair market value of certain alterations made to the related tower by AT&T. As of June 30, 2026, the Company has purchased an aggregate of approximately 900 of the subleased towers which are subject to the applicable agreement, including 120 towers purchased during the six months ended June 30, 2026 for an aggregate purchase price of $102.1 million. The aggregate purchase option price for the remaining towers leased and subleased is $1.1 billion and includes per annum accretion through the applicable expiration of the lease or sublease of a site. For the applicable sites, AT&T has the right to continue to lease space subject to a monthly fee, which shall escalate in accordance with the standard master lease agreement for the remainder of AT&T’s tenancy. AT&T shall have the right to renew each lease for up to five successive five-year terms. Other Contingencies—The Company is subject to income tax and other taxes in the geographic areas where it holds assets or operates, and periodically receives notifications of audits, assessments or other actions by taxing authorities. Taxing authorities may issue notices or assessments while audits are being conducted. In certain jurisdictions, taxing authorities may issue assessments with minimal examination. These notices and assessments do not represent amounts that the Company is obligated to pay and are often not reflective of the actual tax liability for which the Company will ultimately be liable. In the process of responding to assessments of taxes that the Company believes are not enforceable, the Company avails itself of both administrative and judicial remedies. The Company evaluates the circumstances of each notification or assessment based on the information available and, in those instances in which the Company does not anticipate a successful defense of positions taken in its tax filings, a liability is recorded in the appropriate amount based on the underlying assessment.

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Total non-lease revenue	$ 211.1	$ 243.7	$ 427.2	$ 469.7
Property lease revenue	2,538.0	2,383.2	5,059.4	4,720.0
Total revenue	2,749.1	2,626.9	5,486.6	5,189.7
U.S. & Canada
Disaggregation of Revenue [Line Items]
Total non-lease revenue	136.5	172.0	273.3	321.3
Property lease revenue	1,199.2	1,234.6	2,391.6	2,458.2
Total revenue	1,335.7	1,406.6	2,664.9	2,779.5
Africa & APAC
Disaggregation of Revenue [Line Items]
Total non-lease revenue	2.2	3.4	6.3	15.4
Property lease revenue	413.1	332.9	787.6	654.5
Total revenue	415.3	336.3	793.9	669.9
Europe
Disaggregation of Revenue [Line Items]
Total non-lease revenue	3.4	3.4	7.0	6.2
Property lease revenue	256.0	229.3	513.1	439.5
Total revenue	259.4	232.7	520.1	445.7
Latin America
Disaggregation of Revenue [Line Items]
Total non-lease revenue	26.8	28.1	57.2	54.1
Property lease revenue	414.8	361.3	864.5	734.5
Total revenue	441.6	389.4	921.7	788.6
Data Centers
Disaggregation of Revenue [Line Items]
Total non-lease revenue	42.2	36.8	83.4	72.7
Property lease revenue	254.9	225.1	502.6	433.3
Total revenue	297.1	261.9	586.0	506.0
Non-lease property revenue
Disaggregation of Revenue [Line Items]
Total non-lease revenue	149.8	144.2	298.3	295.6
Non-lease property revenue \| U.S. & Canada
Disaggregation of Revenue [Line Items]
Total non-lease revenue	75.2	72.5	144.4	147.2
Non-lease property revenue \| Africa & APAC
Disaggregation of Revenue [Line Items]
Total non-lease revenue	2.2	3.4	6.3	15.4
Non-lease property revenue \| Europe
Disaggregation of Revenue [Line Items]
Total non-lease revenue	3.4	3.4	7.0	6.2
Non-lease property revenue \| Latin America
Disaggregation of Revenue [Line Items]
Total non-lease revenue	26.8	28.1	57.2	54.1
Non-lease property revenue \| Data Centers
Disaggregation of Revenue [Line Items]
Total non-lease revenue	42.2	36.8	83.4	72.7
Services revenue
Disaggregation of Revenue [Line Items]
Total non-lease revenue	61.3	99.5	128.9	174.1
Services revenue \| U.S. & Canada
Disaggregation of Revenue [Line Items]
Total non-lease revenue	61.3	99.5	128.9	174.1
Services revenue \| Africa & APAC
Disaggregation of Revenue [Line Items]
Total non-lease revenue	0.0	0.0	0.0	0.0
Services revenue \| Europe
Disaggregation of Revenue [Line Items]
Total non-lease revenue	0.0	0.0	0.0	0.0
Services revenue \| Latin America
Disaggregation of Revenue [Line Items]
Total non-lease revenue	0.0	0.0	0.0	0.0
Services revenue \| Data Centers
Disaggregation of Revenue [Line Items]
Total non-lease revenue	$ 0.0	$ 0.0	$ 0.0	$ 0.0

LEASES - Narrative (Details) $ in Millions	6 Months Ended
LEASES - Narrative (Details) $ in Millions	Jun. 30, 2026 USD ($)
Lessor, Lease, Description [Line Items]
Amortization of lease incentive, period	8 years
Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent
Lessor, Lease, Description [Line Items]
Lease incentives	$ 338.2
Balance Sheet Location [Axis]: us-gaap:PrepaidExpenseAndOtherAssetsCurrent
Lessor, Lease, Description [Line Items]
Lease incentives	$ 50.4

EQUITY

6 Months Ended

Jun. 30, 2026

Equity [Abstract]

EQUITY

Sales of Equity Securities—The Company receives proceeds from sales of its equity securities pursuant to the ESPP and upon exercise of stock options granted under the 2007 Plan. During the six months ended June 30, 2026, the Company received an aggregate of $21.0 million in proceeds upon exercises of stock options and sales pursuant to the ESPP.

Stock Repurchase Program—In December 2017, the Board of Directors approved a stock repurchase program, pursuant to which the Company is authorized to repurchase up to $2.0 billion of its common stock (the “Buyback Program”).

Under the Buyback Program, the Company is authorized to purchase shares from time to time through open market purchases, in privately negotiated transactions not to exceed market prices, and (with respect to such open market purchases) pursuant to plans adopted in accordance with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), in accordance with securities laws and other legal requirements and subject to market conditions and other factors.

During the six months ended June 30, 2026, the Company repurchased 1,164,378 shares of its common stock for an aggregate of $202.9 million, including commissions and fees, under the Buyback Program. As of June 30, 2026, the Company has repurchased a total of 3,105,690 shares of its common stock under the Buyback Program for an aggregate of $550.0 million, including commissions and fees.

The Company expects to fund any further repurchases of its common stock through a combination of cash on hand, cash generated by operations and borrowings under its credit facilities. Repurchases under the Buyback Program are subject to, among other things, the Company having available cash to fund the repurchases.

Distributions—During the six months ended June 30, 2026, the Company declared or paid the following cash distributions (per share data reflects actual amounts):


Declaration Date	Payment Date	Record Date	Distribution per share		Aggregate Payment Amount (1)
Common Stock

May 21, 2026	July 13, 2026	June 12, 2026	$	1.79	$	834.1
March 5, 2026	April 28, 2026	April 14, 2026	$	1.79	$	833.9
December 4, 2025	February 2, 2026	December 29, 2025	$	1.70	$	792.9

_______________

(1)Does not include amounts accrued for distributions payable related to unvested restricted stock units.

During the six months ended June 30, 2025, the Company declared or paid the following cash distributions (per share data reflects actual amounts):


Declaration Date	Payment Date	Record Date	Distribution per share		Aggregate Payment Amount (1)
Common Stock

May 15, 2025	July 11, 2025	June 13, 2025	$	1.70	$	796.0
March 6, 2025	April 28, 2025	April 11, 2025	$	1.70	$	795.8
December 5, 2024	February 3, 2025	December 27, 2024	$	1.62	$	757.1

_______________

(1)Does not include amounts accrued for distributions payable related to unvested restricted stock units.

The Company accrues distributions on unvested restricted stock units, which are payable upon vesting. As of June 30, 2026, the amount accrued for distributions payable related to unvested restricted stock units was $11.8 million. During the six months ended June 30, 2026 and 2025, the Company paid $14.3 million and $11.8 million of distributions upon the vesting of restricted stock units, respectively. To maintain its qualification for taxation as a REIT, the Company expects to continue paying distributions, the amount, timing and frequency of which will be determined, and subject to adjustment, by the Company’s Board of Directors.

- Definition

The entire disclosure for equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 20
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479951/505-20-S50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 20
-Name Accounting Standards Codification
-Section S25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479982/505-20-S25-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480070/505-10-S50-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-3

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-2

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 20
-Name Accounting Standards Codification
-Section S50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479951/505-20-S50-2

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 20
-Name Accounting Standards Codification
-Section S25
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479982/505-20-S25-2

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 4.C)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-4

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 20
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 1.D.2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479921/505-20-S99-1

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 20
-Name Accounting Standards Codification
-Section S50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479951/505-20-S50-3

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 1.B.3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480148/855-10-S99-1

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 20
-Name Accounting Standards Codification
-Section S25
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479982/505-20-S25-3

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/505/tableOfContent

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-11

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(31))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-14

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477968/946-235-50-2

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477968/946-235-50-2

Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478448/946-505-50-6

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-6

Reference 31: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 32: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 33: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-14

Reference 34: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-14

Reference 35: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-16

+ Details

ACCRUED EXPENSES (Tables)

6 Months Ended

Jun. 30, 2026

Accrued Liabilities, Current [Abstract]

Schedule of Accrued Expenses

Accrued expenses consisted of the following:


	As of
	June 30, 2026		December 31, 2025
Accrued construction costs	$	194.9	$	195.6
Accrued income tax payable	21.1		26.5
Accrued pass-through costs	88.1		65.6
Amounts payable for acquisitions (1)	113.0		128.0
Amounts payable to tenants	81.1		70.9
Accrued property and real estate taxes	158.9		157.0
Accrued rent	49.4		52.0

Payroll and related withholdings	95.6		137.6
Other accrued expenses	314.8		279.3
Total accrued expenses	$	1,116.9	$	1,112.5

_______________

(1)As of June 30, 2026 and December 31, 2025 includes $106.2 million and $106.9 million of deferred payments, respectively, including post-closing adjustments, associated with the Company’s 2021 acquisition of the European and Latin American tower divisions from Telxius Telecom, S.A. due in 2026.

PREPAID AND OTHER CURRENT ASSETS

6 Months Ended

Jun. 30, 2026

Prepaid Expense and Other Assets, Current [Abstract]

PREPAID AND OTHER CURRENT ASSETS

Prepaid and other current assets consisted of the following:


	As of
	June 30, 2026		December 31, 2025
Prepaid assets	$	109.6	$	80.7
Prepaid income tax	127.2		66.7

Unbilled receivables	200.4		194.8
Value added tax and other consumption tax receivables	38.3		44.5
Other miscellaneous current assets	103.4		99.6
Prepaid and other current assets	$	578.9	$	486.3

INCOME TAXES - Penalties and Income Tax Related Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Income Tax Disclosure [Abstract]
Penalties and income tax-related interest expense	$ 7.9	$ 5.8	$ 13.8	$ 11.3

GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Intangible Asset, Finite-Lived [Line Items]
Amortization of intangible assets	$ 215.9	$ 218.9	$ 432.3	$ 433.0
Weighted Average
Intangible Asset, Finite-Lived [Line Items]
Finite-lived intangible assets, remaining amortization period	19 years		19 years

- Definition

Amount of amortization expense for finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482558/350-40-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-2

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476153/220-40-55-11

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476153/220-40-55-18

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 24
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476153/220-40-55-24

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-12

Reference 8: http://www.xbrl.org/2003/role/exampleRef
-Name Accounting Standards Codification
-Section 55
-Paragraph 40
-SubTopic 30
-Topic 350
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482640/350-30-55-40

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482686/350-30-45-2

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-6

+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482558/350-40-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 985
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481283/985-20-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-3

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-2

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 985
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481283/985-20-50-1

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 985
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481283/985-20-50-1

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 985
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481283/985-20-50-1

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 31
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-31

Reference 10: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 20
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-20

Reference 11: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 20
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-20

Reference 12: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 38
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-38

Reference 13: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 31
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-31

Reference 14: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 38
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-38

Reference 15: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 38
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-38

Reference 16: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 38
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-38

Reference 17: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 38
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-38

Reference 18: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 38
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-38

Reference 19: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 31
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-31

Reference 20: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 31
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-31

Reference 21: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 31
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-31

Reference 22: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 31
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-31

Reference 23: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 31
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-31

Reference 24: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 31
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-31

Reference 25: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 31
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-31

Reference 26: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-31

Reference 27: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 29
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-29

Reference 28: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 29
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-29

Reference 29: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 20
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-20

Reference 30: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 20
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-20

Reference 31: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 14
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-14

Reference 32: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 14
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-14

Reference 33: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-14

Reference 34: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 14
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-14

Reference 35: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479876/805-20-55-14

Reference 36: http://www.xbrl.org/2003/role/exampleRef
-Name Accounting Standards Codification
-Section 55
-Paragraph 40
-SubTopic 30
-Topic 350
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482640/350-30-55-40

Reference 37: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482686/350-30-45-1

Reference 38: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-2

Reference 39: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483154/926-20-50-5

+ Details

STOCK-BASED COMPENSATION - Stock-Based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 34.2	$ 47.3	$ 92.6	$ 100.7
Executive Vice President and President, APAC
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense				$ (7.1)

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(v)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iv)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (l)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 35
-Paragraph 1D
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480483/718-10-35-1D

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 35
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480483/718-10-35-3

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(01)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(02)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(03)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(01)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(02)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(03)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

ACCRUED EXPENSES (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Accrued Liabilities, Current [Abstract]
Accrued construction costs	$ 194.9	$ 195.6
Accrued income tax payable	21.1	26.5
Accrued pass-through costs	88.1	65.6
Amounts payable for acquisitions	113.0	128.0
Amounts payable to tenants	81.1	70.9
Accrued property and real estate taxes	158.9	157.0
Accrued rent	49.4	52.0
Payroll and related withholdings	95.6	137.6
Other accrued expenses	314.8	279.3
Total accrued expenses	1,116.9	1,112.5
Deferred payments, including post-closing adjustments, associated with an acquisition	$ 106.2	$ 106.9

LONG-TERM OBLIGATIONS - Long-Term Debt Obligations (Details) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 18, 2026	May 27, 2026	May 21, 2026	Apr. 14, 2026	Feb. 13, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Finance lease obligations	$ 14.4						$ 15.9
Total	37,189.6						37,220.3
Less current portion of long-term obligations	(5,226.5)						(3,387.8)
Long-term obligations	31,963.1						33,832.5
American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	35,379.7						35,409.2
American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	1,795.5						$ 1,795.2
Senior notes \| 4.400% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)						4.40%	4.40%
Long-term debt	0.0						$ 499.9
Senior notes \| 1.600% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)					1.60%		1.60%
Long-term debt	0.0				$ 0.0		$ 699.7
Senior notes \| 1.950% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)				1.95%			1.95%
Long-term debt	$ 0.0			$ 0.0			$ 586.9
Senior notes \| 1.450% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	1.45%
Long-term debt	$ 599.7						598.9
Senior notes \| 3.375% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	3.375%
Long-term debt	$ 999.4						998.5
Senior notes \| 3.125% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	3.125%
Long-term debt	$ 399.8						399.6
Senior notes \| 2.750% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	2.75%
Long-term debt	$ 749.4						749.0
Senior notes \| 0.450% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	0.45%
Long-term debt	$ 856.0						879.7
Senior notes \| 0.400% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	0.40%
Long-term debt	$ 570.4						585.8
Senior notes \| 3.650% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	3.65%
Long-term debt	$ 648.8						648.0
Senior notes \| 4.125% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	4.125%	4.125%
Long-term debt	$ 399.2						703.1
Senior notes \| 3.55% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	3.55%
Long-term debt	$ 749.1						748.7
Senior notes \| 3.600% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	3.60%
Long-term debt	$ 698.4						697.9
Senior notes \| 0.500% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	0.50%
Long-term debt	$ 854.7						878.3
Senior notes \| 1.500% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	1.50%
Long-term debt	$ 648.9						648.5
Senior notes \| 5.500% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	5.50%
Long-term debt	$ 697.2						696.5
Senior notes \| 5.250% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	5.25%
Long-term debt	$ 647.1						646.4
Senior notes \| 5.800% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	5.80%
Long-term debt	$ 746.5						745.9
Senior notes \| 5.200% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	5.20%
Long-term debt	$ 645.8						645.1
Senior notes \| 3.950% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	3.95%
Long-term debt	$ 596.6						596.0
Senior notes \| 0.875% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	0.875%
Long-term debt	$ 854.4						878.2
Senior notes \| 3.800% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	3.80%
Long-term debt	$ 1,643.4						1,642.4
Senior notes \| 2.900% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	2.90%
Long-term debt	$ 746.5						746.0
Senior notes \| 5.000% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	5.00%
Long-term debt	$ 595.1						594.4
Senior notes \| 4.900% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	4.90%
Long-term debt	$ 848.2						848.0
Senior notes \| 3.900% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	3.90%
Long-term debt	$ 567.6						583.3
Senior notes \| 2.100% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	2.10%
Long-term debt	$ 745.7						745.2
Senior notes \| 0.950% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	0.95%
Long-term debt	$ 567.3						583.1
Senior notes \| 1.875% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	1.875%
Long-term debt	$ 795.7						795.2
Senior notes \| 2.700% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	2.70%
Long-term debt	$ 696.6						696.3
Senior notes \| 4.625% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	4.625%
Long-term debt	$ 566.4						582.2
Senior notes \| 2.300% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	2.30%
Long-term debt	$ 694.9						694.5
Senior notes \| 1.000% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	1.00%
Long-term debt	$ 738.2						758.8
Senior notes \| 4.050% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	4.05%
Long-term debt	$ 644.8						644.4
Senior notes \| 3.625% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	3.625%
Long-term debt	$ 567.9						583.9
Senior notes \| 4.700% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	4.70%
Long-term debt	$ 840.9						840.4
Senior notes \| 5.650% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	5.65%
Long-term debt	$ 792.8						792.3
Senior notes \| 1.250% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	1.25%
Long-term debt	$ 566.4						582.4
Senior notes \| 5.550% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	5.55%
Long-term debt	$ 842.6						842.2
Senior notes \| 4.000% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	4.00%		4.00%
Long-term debt	$ 848.3						0.0
Senior notes \| 5.900% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	5.90%
Long-term debt	$ 743.2						742.9
Senior notes \| 5.450% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	5.45%
Long-term debt	$ 641.9						641.5
Senior notes \| 4.100% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	4.10%
Long-term debt	$ 564.9						580.8
Senior notes \| 5.400% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	5.40%
Long-term debt	$ 592.9						592.5
Senior notes \| 5.350% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	5.35%
Long-term debt	$ 731.1						731.4
Senior notes \| 3.700% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	3.70%
Long-term debt	$ 592.9						592.8
Senior notes \| 3.100% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	3.10%
Long-term debt	$ 1,039.3						1,039.1
Senior notes \| 2.950% senior notes \| American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate (as a percent)	2.95%
Long-term debt	$ 1,024.9						1,024.5
Secured debt \| Series 2018-1A securities \| American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	498.7						498.3
Secured debt \| Series 2023-1A Securities \| American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	1,293.6						1,291.7
Unsecured debt \| 2021 Term Loan \| American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	997.9						998.1
Unsecured debt \| Other subsidiary debt \| American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	3.2						5.2
Revolving Credit Facility \| 2021 Multicurrency Credit Facility \| American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	1,085.0						380.0
Revolving Credit Facility \| 2021 Credit Facility \| American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	$ 695.0						$ 0.0

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
CURRENT ASSETS:
Cash and cash equivalents	$ 1,762.5	$ 1,474.8
Restricted cash	130.1	130.4
Accounts receivable, net	650.9	650.3
Prepaid and other current assets	578.9	486.3
Total current assets	3,122.4	2,741.8
PROPERTY AND EQUIPMENT, net	20,573.0	20,356.3
GOODWILL	12,181.5	12,255.5
OTHER INTANGIBLE ASSETS, net	13,980.6	14,530.7
DEFERRED TAX ASSET	175.1	151.4
DEFERRED RENT ASSET	3,772.9	3,851.3
RIGHT-OF-USE ASSET	8,466.2	8,426.5
NOTES RECEIVABLE AND OTHER NON-CURRENT ASSETS	1,028.4	876.9
TOTAL	63,300.1	63,190.4
CURRENT LIABILITIES:
Accounts payable	202.8	259.8
Accrued expenses	1,116.9	1,112.5
Distributions payable	852.7	818.6
Accrued interest	330.5	425.2
Current portion of operating lease liability	644.1	584.9
Current portion of long-term obligations	5,226.5	3,387.8
Unearned revenue	497.0	325.0
Total current liabilities	8,870.5	6,913.8
LONG-TERM OBLIGATIONS	31,963.1	33,832.5
OPERATING LEASE LIABILITY	7,146.2	7,158.7
ASSET RETIREMENT OBLIGATIONS	2,527.0	2,512.9
DEFERRED TAX LIABILITY	1,573.6	1,440.3
OTHER NON-CURRENT LIABILITIES	967.2	976.9
Total liabilities	53,047.6	52,835.1
COMMITMENTS AND CONTINGENCIES
EQUITY (shares in thousands):
Common stock: $0.01 par value; 1,000,000 shares authorized; 480,163 and 479,358 shares issued; and 465,959 and 466,318 shares outstanding, respectively	4.8	4.8
Additional paid-in capital	15,276.9	15,215.3
Distributions in excess of earnings	(5,032.3)	(5,086.0)
Accumulated other comprehensive loss	(4,661.0)	(4,815.8)
Treasury stock (14,204 and 13,040 shares at cost, respectively)	(1,868.7)	(1,665.8)
Total American Tower Corporation equity	3,719.7	3,652.5
Noncontrolling interests	6,532.8	6,702.8
Total equity	10,252.5	10,355.3
TOTAL	$ 63,300.1	$ 63,190.4

LONG-TERM OBLIGATIONS - Key Terms of Notes (Details) - American Tower Corporation - Senior notes - 4.000% Senior Notes due 2033 € in Millions, $ in Millions	May 27, 2026 USD ($)	Jun. 30, 2026 USD ($)	May 27, 2026 EUR (€)
Debt Instrument [Line Items]
Contractual Interest Rate (as a percent)	4.00%	4.00%	4.00%
Aggregate Principal Amount	$ 872.0	$ 872.0	€ 750.0
Debt Instrument, Redemption Option One
Debt Instrument [Line Items]
Redemption price percentage	100.00%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.9-06)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-9

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A

Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 15: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4

Reference 16: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

Reference 17: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 18: http://www.xbrl.org/2003/role/exampleRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482949/835-30-55-8

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 20: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B

Reference 21: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C

Reference 22: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481568/470-20-55-69E

Reference 23: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69F
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481568/470-20-55-69F

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 26: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D

Reference 31: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D

Reference 32: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D

Reference 33: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E

Reference 34: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E

Reference 35: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E

Reference 36: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F

Reference 37: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F

Reference 38: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F

Reference 39: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F

Reference 40: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

Reference 41: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 42: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482900/835-30-50-1

+ Details

STOCK-BASED COMPENSATION - Key Assumptions (Details) - PSUs	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024
2026 PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	2 years 9 months 21 days
Risk-free interest rate	3.58%
Annualized volatility	25.42%
2025 PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)		2 years 9 months 21 days
Risk-free interest rate		3.91%
Annualized volatility		27.91%
2024 PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)			2 years 9 months 21 days
Risk-free interest rate			4.31%
Annualized volatility			26.75%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
REVENUES:
Total operating revenues	$ 2,749.1	$ 2,626.9	$ 5,486.6	$ 5,189.7
Costs of operations (exclusive of items shown separately below):
Property	707.9	640.6	1,372.7	1,240.2
Depreciation, amortization and accretion	514.4	510.3	1,032.6	1,002.8
Selling, general, administrative and development expense	233.8	233.7	491.2	471.2
Other operating (income) expense	(9.2)	(3.5)	10.2	(59.3)
Total operating expenses	1,480.3	1,429.2	2,978.6	2,737.9
OPERATING INCOME	1,268.8	1,197.7	2,508.0	2,451.8
OTHER INCOME (EXPENSE):
Interest income	44.4	30.6	80.4	57.5
Interest expense	(354.5)	(342.6)	(701.8)	(667.9)
Loss on retirement of long-term obligations	(3.2)	0.0	(3.2)	0.0
Other income (expense) (including foreign currency gains (losses) of $42.1, $(484.0), $110.2 and $(829.7), respectively)	53.8	(373.9)	144.0	(712.1)
Total other expense	(259.5)	(685.9)	(480.6)	(1,322.5)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	1,009.3	511.8	2,027.4	1,129.3
Income tax provision	(121.8)	(131.3)	(261.4)	(250.2)
Net income	887.5	380.5	1,766.0	879.1
Net income attributable to noncontrolling interests	(20.0)	(13.7)	(39.0)	(23.6)
NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS, BASIC	867.5	366.8	1,727.0	855.5
NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS, DILUTED	$ 867.5	$ 366.8	$ 1,727.0	$ 855.5
NET INCOME PER COMMON SHARE AMOUNTS:
Basic net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 1.86	$ 0.78	$ 3.71	$ 1.83
Diluted net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 1.86	$ 0.78	$ 3.70	$ 1.83
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING (in thousands):
BASIC (in shares)	465,938	468,178	466,068	467,909
DILUTED (in shares)	466,265	468,791	466,578	468,717
Property
REVENUES:
Total operating revenues	$ 2,687.8	$ 2,527.4	$ 5,357.7	$ 5,015.6
Services
REVENUES:
Total operating revenues	61.3	99.5	128.9	174.1
Costs of operations (exclusive of items shown separately below):
Services	$ 33.4	$ 48.1	$ 71.9	$ 83.0

ACCRUED EXPENSES

6 Months Ended

Jun. 30, 2026

Accrued Liabilities, Current [Abstract]

ACCRUED EXPENSES

Accrued expenses consisted of the following:


	As of
	June 30, 2026		December 31, 2025
Accrued construction costs	$	194.9	$	195.6
Accrued income tax payable	21.1		26.5
Accrued pass-through costs	88.1		65.6
Amounts payable for acquisitions (1)	113.0		128.0
Amounts payable to tenants	81.1		70.9
Accrued property and real estate taxes	158.9		157.0
Accrued rent	49.4		52.0

Payroll and related withholdings	95.6		137.6
Other accrued expenses	314.8		279.3
Total accrued expenses	$	1,116.9	$	1,112.5

_______________

NONCONTROLLING INTERESTS - Changes in Noncontrolling Interest (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at beginning of period	$ 10,152.1	$ 9,936.3	$ 10,355.3	$ 9,648.7
Impact of sale of Bangladesh partnership on noncontrolling interests	(13.2)		(13.2)
Net income attributable to noncontrolling interests	887.5	380.5	1,766.0	879.1
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax	101.5	877.8	48.6	1,471.4
Contributions from noncontrolling interest holders	3.5	110.5	4.3	111.3
Distributions to noncontrolling interest holders	(64.2)	(83.1)	(93.9)	(111.8)
Balance at end of period	10,252.5	10,478.9	10,252.5	10,478.9
Noncontrolling Interests
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at beginning of period	6,629.5	6,401.5	6,702.8	6,266.5
Impact of sale of Bangladesh partnership on noncontrolling interests	(13.2)		(13.2)	0.0
Net income attributable to noncontrolling interests	20.0	13.7	39.0	23.6
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax	(42.8)	323.5	(106.2)	476.5
Contributions from noncontrolling interest holders	3.5	110.5	4.3	111.3
Distributions to noncontrolling interest holders	(64.2)	(83.1)	(93.9)	(111.8)
Balance at end of period	$ 6,532.8	$ 6,766.1	$ 6,532.8	$ 6,766.1

- Definition

Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

+ References + Details

- Definition

Amount of equity (deficit) attributable to parent and noncontrolling interest. Excludes temporary equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480070/505-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 3
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479719/606-10-65-3

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 8
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480339/815-10-65-8

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 3
-Subparagraph (e)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479719/606-10-65-3

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 8
-Subparagraph (f)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480339/815-10-65-8

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 8
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480339/815-10-65-8

Reference 13: http://www.xbrl.org/2003/role/exampleRef
-Topic 946
-SubTopic 830
-Name Accounting Standards Codification
-Section 55
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479168/946-830-55-11

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482705/350-40-65-4

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482705/350-40-65-4

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(19))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 20: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-11

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 50
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481229/860-50-50-5

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 8
-Subparagraph (d)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482615/740-10-65-8

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 8
-Subparagraph (d)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482615/740-10-65-8

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 6
-Subparagraph (i)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480528/815-20-65-6

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (e)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479719/606-10-65-2

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (d)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479719/606-10-65-2

Reference 28: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

Reference 29: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 30: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 31: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

Reference 32: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 9
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479343/105-10-65-9

Reference 33: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 9
-Subparagraph (d)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479343/105-10-65-9

Reference 34: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 17
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480336/718-10-65-17

Reference 35: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 605
-Name Accounting Standards Codification
-Section 55
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477548/944-605-55-14

Reference 36: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 605
-Name Accounting Standards Codification
-Section 55
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477548/944-605-55-11

Reference 37: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-6

Reference 38: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 60
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476176/805-60-65-1

Reference 39: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 60
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476176/805-60-65-1

Reference 40: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 41: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 42: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (d)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 43: http://www.xbrl.org/2003/role/disclosureRef
-Topic 848
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (a)(3)(iii)(03)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483550/848-10-65-2

Reference 44: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 24
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483421/250-10-45-24

Reference 45: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 23
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483421/250-10-45-23

Reference 46: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483421/250-10-45-5

Reference 47: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 5
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479654/326-10-65-5

Reference 48: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 6
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480528/815-20-65-6

Reference 49: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 6
-Subparagraph (h)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480528/815-20-65-6

Reference 50: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 6
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480528/815-20-65-6

Reference 51: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 6
-Subparagraph (h)(1)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480528/815-20-65-6

Reference 52: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 6
-Subparagraph (h)(1)(iv)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480528/815-20-65-6

Reference 53: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (f)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 54: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (f)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 55: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479654/326-10-65-4

Reference 56: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 57: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (e)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480175/815-40-65-1

Reference 58: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-7

Reference 59: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482765/220-10-50-5

Reference 60: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-1

Reference 61: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481694/830-30-45-17

Reference 62: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 20
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481694/830-30-45-20

Reference 63: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 205
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478009/946-205-45-3

Reference 64: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478448/946-505-50-3

Reference 65: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04(19))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1

Reference 66: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.6-05(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479170/946-210-S99-2

Reference 67: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(4)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3

Reference 68: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3

Reference 69: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(7))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3

Reference 70: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 71: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481231/810-10-45-15

Reference 72: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 16
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481231/810-10-45-16

Reference 73: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4I
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481175/810-10-55-4I

Reference 74: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 60
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476166/350-60-65-1

Reference 75: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (f)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481538/470-20-65-4

+ Details

BUSINESS SEGMENTS - Summarized Segment Financial Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Segment Reporting [Line Items]
Segment revenues	$ 2,749.1	$ 2,626.9	$ 5,486.6	$ 5,189.7
Segment selling, general, administrative and development expense	233.8	233.7	491.2	471.2
OPERATING INCOME	1,268.8	1,197.7	2,508.0	2,451.8
Stock-based compensation expense	34.2	47.3	92.6	100.7
Other selling, general, administrative and development expense	63.5	58.9	128.3	117.5
Depreciation, amortization and accretion	514.4	510.3	1,032.6	1,002.8
Other expense	250.3	682.4	490.8	1,263.2
Income from continuing operations before income taxes	1,009.3	511.8	2,027.4	1,129.3
Total assets	63,300.1	63,754.5	63,300.1	63,754.5	$ 63,190.4
Capital expenditures			788.7	652.9
Unrealized gains on equity securities	12.0	110.7	36.4	118.3
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| ATC Philippines and Kirtonkhola Tower Bangladesh Limited
Segment Reporting [Line Items]
Gain (loss) on sale of subsidiary	20.4		20.4
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| South Africa Fiber
Segment Reporting [Line Items]
Gain (loss) on sale of subsidiary				53.6
U.S. & Canada
Segment Reporting [Line Items]
Segment revenues	1,335.7	1,406.6	2,664.9	2,779.5
Africa & APAC
Segment Reporting [Line Items]
Segment revenues	415.3	336.3	793.9	669.9
Europe
Segment Reporting [Line Items]
Segment revenues	259.4	232.7	520.1	445.7
Latin America
Segment Reporting [Line Items]
Segment revenues	441.6	389.4	921.7	788.6
Data Centers
Segment Reporting [Line Items]
Segment revenues	297.1	261.9	586.0	506.0
Operating Segments
Segment Reporting [Line Items]
Segment revenues	2,749.1	2,626.9	5,486.6	5,189.7
Segment operating expenses	741.3	688.7	1,444.6	1,323.2
Segment gross margin	2,007.8	1,938.2	4,042.0	3,866.5
Segment selling, general, administrative and development expense	136.1	127.5	270.3	253.0
OPERATING INCOME	1,871.7	1,810.7	3,771.7	3,613.5
Operating Segments \| Total Property
Segment Reporting [Line Items]
Segment revenues	2,687.8	2,527.4	5,357.7	5,015.6
Segment operating expenses	707.9	640.6	1,372.7	1,240.2
Segment gross margin	1,979.9	1,886.8	3,985.0	3,775.4
Segment selling, general, administrative and development expense	130.4	121.0	259.3	240.1
OPERATING INCOME	1,849.5	1,765.8	3,725.7	3,535.3
Total assets	62,884.6	63,087.0	62,884.6	63,087.0
Capital expenditures			780.9	649.0
Operating Segments \| U.S. & Canada
Segment Reporting [Line Items]
Segment revenues	1,274.4	1,307.1	2,536.0	2,605.4
Segment operating expenses	220.4	222.2	426.7	424.5
Segment gross margin	1,054.0	1,084.9	2,109.3	2,180.9
Segment selling, general, administrative and development expense	41.9	41.3	80.2	80.6
OPERATING INCOME	1,012.1	1,043.6	2,029.1	2,100.3
Total assets	26,401.2	26,889.9	26,401.2	26,889.9
Capital expenditures			164.5	160.5
Operating Segments \| Africa & APAC
Segment Reporting [Line Items]
Segment revenues	415.3	336.3	793.9	669.9
Segment operating expenses	146.8	104.5	266.9	203.8
Segment gross margin	268.5	231.8	527.0	466.1
Segment selling, general, administrative and development expense	22.2	18.9	40.9	39.0
OPERATING INCOME	246.3	212.9	486.1	427.1
Total assets	4,363.8	4,234.9	4,363.8	4,234.9
Capital expenditures			73.3	99.8
Operating Segments \| Europe
Segment Reporting [Line Items]
Segment revenues	259.4	232.7	520.1	445.7
Segment operating expenses	96.1	86.6	188.6	162.6
Segment gross margin	163.3	146.1	331.5	283.1
Segment selling, general, administrative and development expense	15.9	14.6	33.2	30.4
OPERATING INCOME	147.4	131.5	298.3	252.7
Total assets	12,591.0	12,884.5	12,591.0	12,884.5
Capital expenditures			128.8	106.5
Operating Segments \| Latin America
Segment Reporting [Line Items]
Segment revenues	441.6	389.4	921.7	788.6
Segment operating expenses	130.8	124.4	264.6	247.1
Segment gross margin	310.8	265.0	657.1	541.5
Segment selling, general, administrative and development expense	23.7	27.1	53.8	48.1
OPERATING INCOME	287.1	237.9	603.3	493.4
Total assets	8,742.1	8,372.4	8,742.1	8,372.4
Capital expenditures			73.0	57.9
Operating Segments \| Data Centers
Segment Reporting [Line Items]
Segment revenues	297.1	261.9	586.0	506.0
Segment operating expenses	113.8	102.9	225.9	202.2
Segment gross margin	183.3	159.0	360.1	303.8
Segment selling, general, administrative and development expense	26.7	19.1	51.2	42.0
OPERATING INCOME	156.6	139.9	308.9	261.8
Total assets	10,786.5	10,705.3	10,786.5	10,705.3
Capital expenditures			341.3	224.3
Operating Segments \| Services
Segment Reporting [Line Items]
Segment revenues	61.3	99.5	128.9	174.1
Segment operating expenses	33.4	48.1	71.9	83.0
Segment gross margin	27.9	51.4	57.0	91.1
Segment selling, general, administrative and development expense	5.7	6.5	11.0	12.9
OPERATING INCOME	22.2	44.9	46.0	78.2
Total assets	79.3	139.0	79.3	139.0
Capital expenditures			0.0	0.0
Other
Segment Reporting [Line Items]
Stock-based compensation expense	34.2	47.3	92.6	100.7
Other selling, general, administrative and development expense	63.5	58.9	128.3	117.5
Depreciation, amortization and accretion	514.4	510.3	1,032.6	1,002.8
Other expense	250.3	682.4	490.8	1,263.2
Total assets	$ 336.2	$ 528.5	336.2	528.5
Capital expenditures			$ 7.8	$ 3.9

LEASES

6 Months Ended

Jun. 30, 2026

Leases [Abstract]

LEASES

The Company determines if an arrangement is a lease at the inception of the agreement. The Company considers an arrangement to be a lease if it conveys the right to control the use of the communications infrastructure or ground space underneath communications infrastructure for a period of time in exchange for consideration. The Company is both a lessor and a lessee.

During the six months ended June 30, 2026, the Company made no changes to the methods described in note 4 to its consolidated financial statements included in the 2025 Form 10-K. As of June 30, 2026, the Company does not have any material related party leases as either a lessor or a lessee. To the extent there are any intercompany leases, these are eliminated in consolidation.

Lessor— Historically, the Company has been able to successfully renew its applicable leases as needed to ensure continuation of its revenue. Accordingly, the Company assumes that it will have access to the communications infrastructure or ground space underlying its sites when calculating future minimum rental receipts through the end of the respective terms. Future minimum rental receipts expected under non-cancellable operating lease agreements as of June 30, 2026 were as follows:


Fiscal Year	Amount (1) (2)
Remainder of 2026	$	4,443.4
2027	8,752.6
2028	7,338.1
2029	6,854.6
2030	5,541.6
Thereafter	16,965.3
Total	$	49,895.6

_______________

(1)Balances are translated at the applicable period-end exchange rate, which may impact comparability between periods.

If incentives are present in the Company’s leases, they are evaluated to determine proper treatment and, to the extent present, are recorded in Other current assets and Other non-current assets in the consolidated balance sheets and amortized on a straight line basis over the corresponding lease term as a non-cash reduction to revenue. As of June 30, 2026, the remaining weighted average amortization period of the Company’s lease incentives was 8 years. As of June 30, 2026, Other current assets and Other non-current assets include $50.4 million and $338.2 million, respectively, for lease incentives.

Lessee—The Company assesses its right-of-use asset and other lease-related assets for impairment, as described in note 1 to the Company’s consolidated financial statements included in the 2025 Form 10-K. There were no material impairments recorded related to these assets during the three and six months ended June 30, 2026 and 2025. The Company leases certain land, buildings, equipment and office space under operating leases and land and improvements, towers, equipment and vehicles under finance leases. As of June 30, 2026, operating lease assets were included in Right-of-use asset and finance lease assets were included in Property and equipment, net in the consolidated balance sheet. During the six months ended June 30, 2026, there were no material changes in the terms and provisions of the Company’s operating leases in which the Company is a lessee. There were no material changes in finance lease assets and liabilities during the six months ended June 30, 2026.

Information about other lease-related balances is as follows:


	As of
	June 30, 2026		December 31, 2025
Operating leases:
Right-of-use asset	$	8,466.2	$	8,426.5

Current portion of lease liability	$	644.1	$	584.9
Lease liability	7,146.2		7,158.7
Total operating lease liability	$	7,790.3	$	7,743.6

The weighted-average remaining lease terms and incremental borrowing rates are as follows:


	As of
	June 30, 2026		December 31, 2025
Operating leases:
Weighted-average remaining lease term (years)	13.7		13.4
Weighted-average incremental borrowing rate	6.8	%	6.6	%

The following table sets forth the components of lease cost:


	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
Operating lease cost	$	295.5	$	283.1	$	585.3	$	556.3
Variable lease costs not included in lease liability (1)	89.1		80.8		180.3		167.1

______________

(1)Primarily includes property tax paid on behalf of the landlord.

Supplemental cash flow information is as follows:


	Six Months Ended June 30,
	2026		2025
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(613.4)	$	(574.5)



Non-cash items:
New operating leases (1)	$	78.8	$	97.9
Operating lease modifications and reassessments	$	229.1	$	198.7

______________

(1)Amount includes new operating leases and leases acquired in connection with acquisitions.

As of June 30, 2026, the Company does not have material operating or financing leases that have not yet commenced.

Maturities of operating lease liabilities as of June 30, 2026 were as follows:


Fiscal Year	Operating Lease (1)
Remainder of 2026	$	533.2
2027	1,042.4
2028	1,001.9
2029	963.2
2030	915.9
Thereafter	7,479.5
Total lease payments	11,936.1
Less amounts representing interest	(4,145.8)
Total lease liability	7,790.3
Less current portion of lease liability	644.1
Non-current lease liability	$	7,146.2

_______________

(1)Balances are translated at the applicable period-end exchange rate, which may impact comparability between periods.

LEASES


Fiscal Year	Amount (1) (2)
Remainder of 2026	$	4,443.4
2027	8,752.6
2028	7,338.1
2029	6,854.6
2030	5,541.6
Thereafter	16,965.3
Total	$	49,895.6

_______________

(1)Balances are translated at the applicable period-end exchange rate, which may impact comparability between periods.

Information about other lease-related balances is as follows:


	As of
	June 30, 2026		December 31, 2025
Operating leases:
Right-of-use asset	$	8,466.2	$	8,426.5

Current portion of lease liability	$	644.1	$	584.9
Lease liability	7,146.2		7,158.7
Total operating lease liability	$	7,790.3	$	7,743.6

The weighted-average remaining lease terms and incremental borrowing rates are as follows:


	As of
	June 30, 2026		December 31, 2025
Operating leases:
Weighted-average remaining lease term (years)	13.7		13.4
Weighted-average incremental borrowing rate	6.8	%	6.6	%

The following table sets forth the components of lease cost:


	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
Operating lease cost	$	295.5	$	283.1	$	585.3	$	556.3
Variable lease costs not included in lease liability (1)	89.1		80.8		180.3		167.1

______________

(1)Primarily includes property tax paid on behalf of the landlord.

Supplemental cash flow information is as follows:


	Six Months Ended June 30,
	2026		2025
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(613.4)	$	(574.5)



Non-cash items:
New operating leases (1)	$	78.8	$	97.9
Operating lease modifications and reassessments	$	229.1	$	198.7

______________

(1)Amount includes new operating leases and leases acquired in connection with acquisitions.

As of June 30, 2026, the Company does not have material operating or financing leases that have not yet commenced.

Maturities of operating lease liabilities as of June 30, 2026 were as follows:


Fiscal Year	Operating Lease (1)
Remainder of 2026	$	533.2
2027	1,042.4
2028	1,001.9
2029	963.2
2030	915.9
Thereafter	7,479.5
Total lease payments	11,936.1
Less amounts representing interest	(4,145.8)
Total lease liability	7,790.3
Less current portion of lease liability	644.1
Non-current lease liability	$	7,146.2

_______________

(1)Balances are translated at the applicable period-end exchange rate, which may impact comparability between periods.

EARNINGS PER COMMON SHARE

6 Months Ended

Jun. 30, 2026

Earnings Per Share [Abstract]

EARNINGS PER COMMON SHARE

The following table sets forth basic and diluted net income per common share computational data (shares in thousands, except per share data):


	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
Net income attributable to American Tower Corporation common stockholders	$	867.5	$	366.8	$	1,727.0	$	855.5
Basic weighted average common shares outstanding	465,938		468,178		466,068		467,909
Dilutive securities	327		613		510		808
Diluted weighted average common shares outstanding	466,265		468,791		466,578		468,717
Basic net income attributable to American Tower Corporation common stockholders per common share	$	1.86	$	0.78	$	3.71	$	1.83
Diluted net income attributable to American Tower Corporation common stockholders	$	1.86	$	0.78	$	3.70	$	1.83

Shares Excluded From Dilutive Effect—The following shares were not included in the computation of diluted earnings per share because the effect would be anti-dilutive (in thousands, on a weighted average basis)


	Three Months Ended June 30,		Six Months Ended June 30,
	2026	2025	2026	2025
Restricted stock units	243	0	2	1

FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Assets:
Unrealized gains on equity securities	$ 12.0	$ 110.7	$ 36.4	$ 118.3
Fair Value, Measurements, Recurring \| Level 1
Assets:
Investments in equity securities	18.8		18.8		$ 15.3
Fair Value, Measurements, Recurring \| Level 2
Assets:
Investments in equity securities	194.5		194.5		161.6
Fair Value, Measurements, Recurring \| Level 3
Assets:
Investments in equity securities	$ 0.0		$ 0.0		$ 0.0

- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 320
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477268/942-320-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 320
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477268/942-320-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 320
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477268/942-320-50-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-1

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 860
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

Reference 16: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 18: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 80
-Name Accounting Standards Codification
-Section 55
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480078/944-80-55-14

Reference 19: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 80
-Name Accounting Standards Codification
-Section 55
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480078/944-80-55-9

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

EARNINGS PER COMMON SHARE (Tables)

6 Months Ended

Jun. 30, 2026

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Earnings Per Share

The following table sets forth basic and diluted net income per common share computational data (shares in thousands, except per share data):


	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
Net income attributable to American Tower Corporation common stockholders	$	867.5	$	366.8	$	1,727.0	$	855.5
Basic weighted average common shares outstanding	465,938		468,178		466,068		467,909
Dilutive securities	327		613		510		808
Diluted weighted average common shares outstanding	466,265		468,791		466,578		468,717
Basic net income attributable to American Tower Corporation common stockholders per common share	$	1.86	$	0.78	$	3.71	$	1.83
Diluted net income attributable to American Tower Corporation common stockholders	$	1.86	$	0.78	$	3.70	$	1.83

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following shares were not included in the computation of diluted earnings per share because the effect would be anti-dilutive (in thousands, on a weighted average basis)


	Three Months Ended June 30,		Six Months Ended June 30,
	2026	2025	2026	2025
Restricted stock units	243	0	2	1

INCOME TAXES (Tables)

6 Months Ended

Jun. 30, 2026

Income Tax Disclosure [Abstract]

Schedule of Penalties and Income Tax-Related Interest Expense

The Company recorded the following penalties and income tax-related interest expense during the three and six months ended June 30, 2026 and 2025:


	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
Penalties and income tax-related interest expense	$	7.9	$	5.8	$	13.8	$	11.3

EARNINGS PER COMMON SHARE - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Earnings Per Share [Abstract]
Net income attributable to American Tower Corporation common stockholders, basic	$ 867.5	$ 366.8	$ 1,727.0	$ 855.5
Net income attributable to American Tower Corporation common stockholders, diluted	$ 867.5	$ 366.8	$ 1,727.0	$ 855.5
Basic weighted average common shares outstanding (in shares)	465,938	468,178	466,068	467,909
Dilutive securities (in shares)	327	613	510	808
Diluted weighted average common shares outstanding (in shares)	466,265	468,791	466,578	468,717
Basic net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 1.86	$ 0.78	$ 3.71	$ 1.83
Diluted net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 1.86	$ 0.78	$ 3.70	$ 1.83

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482662/260-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482705/350-40-65-4

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (e)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479719/606-10-65-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-4

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 9
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479343/105-10-65-9

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 17
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480336/718-10-65-17

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-6

Reference 11: http://www.xbrl.org/2003/role/exampleRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 52
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482635/260-10-55-52

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 60
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476176/805-60-65-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-3

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482635/260-10-55-15

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (e)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480175/815-40-65-1

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480175/815-40-65-1

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-11

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-11

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-7

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-2

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 60B
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-60B

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-10

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(25))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(27))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(23))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-7

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (f)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481538/470-20-65-4

+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482662/260-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482705/350-40-65-4

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (e)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479719/606-10-65-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-4

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 9
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479343/105-10-65-9

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 17
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480336/718-10-65-17

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-6

Reference 11: http://www.xbrl.org/2003/role/exampleRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 52
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482635/260-10-55-52

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 60
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476176/805-60-65-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-3

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482635/260-10-55-15

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (e)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480175/815-40-65-1

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480175/815-40-65-1

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-11

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-11

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-7

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-2

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 60B
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-60B

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(25))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(27))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(23))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-7

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (f)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481538/470-20-65-4

+ Details

- Definition

Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

+ References

+ Details

- Definition

Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.

+ References + Details

LONG-TERM OBLIGATIONS - Credit Facilities and Term Loans (Details) - American Tower Corporation $ in Millions	6 Months Ended
	Jun. 30, 2026 USD ($) renewalPeriod
Revolving Credit Facility
Line of Credit Facility [Line Items]
Number of optional renewal periods \| renewalPeriod	2
2021 Multicurrency Credit Facility \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Outstanding principal balance	$ 1,085.0
Undrawn letters of credit	$ 18.7
Current margin over LIBOR or EURIBOR	0.875%
Current commitment fee, percentage	0.10%
2021 Credit Facility \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Outstanding principal balance	$ 695.0
Undrawn letters of credit	$ 20.7
Current margin over LIBOR or EURIBOR	0.875%
Current commitment fee, percentage	0.10%
2021 Term Loan \| Unsecured debt
Line of Credit Facility [Line Items]
Outstanding principal balance	$ 1,000.0
Current margin over LIBOR or EURIBOR	0.875%

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

6 Months Ended

Jun. 30, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

The accompanying consolidated and condensed consolidated financial statements have been prepared by American Tower Corporation (together with its subsidiaries, “ATC” or the “Company”) pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). The financial information included herein is unaudited. However, the Company believes that all adjustments, which are of a normal and recurring nature, considered necessary for a fair presentation of its financial position and results of operations for such periods have been included. The consolidated and condensed consolidated financial statements and related notes should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2025 (the “2025 Form 10-K”). The results of operations for the three and six months ended June 30, 2026 are not necessarily indicative of the results that may be expected for the entire year.

Principles of Consolidation and Basis of Presentation—The accompanying consolidated and condensed consolidated financial statements include the accounts of the Company and those entities in which it has a controlling interest. Investments in entities that the Company does not control are accounted for using the equity method or as investments in equity securities, depending upon the Company’s ability to exercise significant influence over operating and financial policies. All intercompany accounts and transactions have been eliminated.

As of June 30, 2026, the Company holds (i) a 52% controlling interest in subsidiaries whose holdings consist of the Company’s operations in France, Germany and Spain (such subsidiaries collectively, “ATC Europe”) (Allianz and La Caisse (each as defined in note 11) hold the noncontrolling interests) and (ii) a controlling common equity interest of approximately 71% in the Company’s U.S. data center business (Stonepeak (as defined and further discussed in note 11) holds approximately 29% of the outstanding common equity and 100% of the outstanding mandatorily convertible preferred equity). As of June 30, 2026, ATC Europe holds an 87% and an 83% controlling interest in subsidiaries that consist of the Company’s operations in Germany and Spain, respectively (PGGM holds the noncontrolling interests). See note 11 for a discussion of changes to the Company’s noncontrolling interests during the six months ended June 30, 2026 and 2025.

Sale of Philippines Subsidiary—On June 15, 2026, the Company completed the sale of its subsidiary in the Philippines (“ATC Philippines”) for total consideration of $75.6 million, resulting in a gain on the sale of $33.2 million, which was included in Other operating (income) expense in the accompanying consolidated statements of operations.

Sale of Bangladesh Partnership—On June 29, 2026, the Company completed the sale of its controlling interest in Kirtonkhola Tower Bangladesh Limited (“KTBL,” and together with ATC Philippines, the “APAC operations” and the sites therein, the “APAC sites”) for total consideration of $6.9 million, resulting in a loss on the sale of $12.8 million, which was included in Other operating (income) expense in the accompanying consolidated statements of operations.

The reclassification of the Company’s cumulative translation adjustment in the Philippines and Bangladesh upon exiting the markets was immaterial and is included within Foreign currency translation adjustment, net of tax within the consolidated statements of equity.

For the year ended December 31, 2025, the Company’s APAC operations represented less than 1% of each of the Company’s total property revenue, total segment gross margin and total segment operating profit. Prior to the completion of the sales of its APAC operations, the Company’s APAC sites represented approximately 1% of the Company’s total communications sites. The Company does not believe that the sales of its APAC operations represent a strategic shift that will have a major impact on its operations and financial results, and as such, the divestitures do not qualify for presentation as discontinued operations. Accordingly, the financial position and results of operations of the APAC operations are presented within the Africa & APAC property segment through the dates of sale.

Significant Accounting Policies—The Company’s significant accounting policies are described in note 1 to the Company’s consolidated financial statements included in the 2025 Form 10-K. There have been no material changes to the Company’s significant accounting policies during the six months ended June 30, 2026, other than those noted below.

Cash and Cash Equivalents and Restricted Cash—The reconciliation of cash and cash equivalents and restricted cash reported within the applicable balance sheet that sum to the total of the same such amounts shown in the statements of cash flows is as follows:


	Six Months Ended June 30,
	2026		2025
Cash and cash equivalents	$	1,762.5	$	2,076.0
Restricted cash	130.1		133.6


Total cash, cash equivalents and restricted cash	$	1,892.6	$	2,209.6

Revenue—The Company’s revenue is derived from leasing the right to use its communications sites, the land on which the sites are located, the land underlying its customers’ sites and the space in its data center facilities (the “lease component”) and from the reimbursement of costs incurred by the Company in operating the communications sites and data center facilities and supporting its customers’ equipment as well as other services and contractual rights (the “non-lease component”). Most of the Company’s revenue is derived from leasing arrangements and is accounted for as lease revenue unless the timing and pattern of revenue recognition of the non-lease component differs from the lease component. If the timing and pattern of the non-lease component revenue recognition differs from that of the lease component, the Company separately determines the stand-alone selling prices and pattern of revenue recognition for each performance obligation. Revenue related to distributed antenna system (“DAS”) networks and fiber and other related assets results from agreements with customers that are generally not accounted for as leases.

Non-lease property revenue—Non-lease property revenue consists primarily of revenue generated from DAS networks, fiber and other property related revenue. DAS networks and fiber arrangements generally require that the Company provide the tenant the right to use available capacity on the applicable communications infrastructure. Performance obligations are satisfied over time for the duration of the arrangements. Non-lease property revenue also includes revenue generated from interconnection offerings in the Company’s data center facilities. Interconnection offerings are generally contracted on a month-to-month basis and are cancellable by the Company or the data center customer at any time. Performance obligations are satisfied over time for the duration of the arrangements. Other property related revenue streams, which include site inspections, are not material on either an individual or consolidated basis. There were no material changes in the receivables, contract assets and contract liabilities from contracts with customers for the three and six months ended June 30, 2026.

Services revenue—The Company offers tower-related services in the United States. These services include site application, zoning and permitting (“AZP”), structural and mount analyses, and construction management services, together with program management offerings that support customer deployment needs from project scoping through construction. There is a single performance obligation related to AZP and construction management, and revenue is recognized over time based on milestones achieved, which are determined based on costs expected to be incurred. Structural and mount analyses services may have more than one performance obligation, contingent upon the number of contracted services. Revenue is recognized at the point in time the services are completed.

A summary of revenue disaggregated by source and geography is as follows:


Three Months Ended June 30, 2026	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers		Total
Non-lease property revenue	$	75.2	$	2.2	$	3.4	$	26.8	$	42.2	$	149.8
Services revenue	61.3		—		—		—		—		61.3
Total non-lease revenue	$	136.5	$	2.2	$	3.4	$	26.8	$	42.2	$	211.1
Property lease revenue	1,199.2		413.1		256.0		414.8		254.9		2,538.0
Total revenue	$	1,335.7	$	415.3	$	259.4	$	441.6	$	297.1	$	2,749.1


Three Months Ended June 30, 2025	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers		Total
Non-lease property revenue	$	72.5	$	3.4	$	3.4	$	28.1	$	36.8	$	144.2
Services revenue	99.5		—		—		—		—		99.5
Total non-lease revenue	$	172.0	$	3.4	$	3.4	$	28.1	$	36.8	$	243.7
Property lease revenue	1,234.6		332.9		229.3		361.3		225.1		2,383.2
Total revenue	$	1,406.6	$	336.3	$	232.7	$	389.4	$	261.9	$	2,626.9


Six Months Ended June 30, 2026	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers		Total
Non-lease property revenue	$	144.4	$	6.3	$	7.0	$	57.2	$	83.4	$	298.3
Services revenue	128.9		—		—		—		—		128.9
Total non-lease revenue	$	273.3	$	6.3	$	7.0	$	57.2	$	83.4	$	427.2
Property lease revenue	2,391.6		787.6		513.1		864.5		502.6		5,059.4
Total revenue	$	2,664.9	$	793.9	$	520.1	$	921.7	$	586.0	$	5,486.6


Six Months Ended June 30, 2025	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers		Total
Non-lease property revenue	$	147.2	$	15.4	$	6.2	$	54.1	$	72.7	$	295.6
Services revenue	174.1		—		—		—		—		174.1
Total non-lease revenue	$	321.3	$	15.4	$	6.2	$	54.1	$	72.7	$	469.7
Property lease revenue	2,458.2		654.5		439.5		734.5		433.3		4,720.0
Total revenue	$	2,779.5	$	669.9	$	445.7	$	788.6	$	506.0	$	5,189.7

Property revenue for the three months ended June 30, 2026 and 2025 includes straight-line revenue of $(18.9) million and $28.2 million, respectively. Property revenue for the six months ended June 30, 2026 and 2025 includes straight-line revenue of $0.0 million and $45.3 million, respectively.

The Company actively monitors the creditworthiness of its customers. In recognizing customer revenue, the Company assesses the collectibility of both the amounts billed and the portion recognized in advance of billing on a straight-line basis. This assessment takes customer credit risk and business and industry conditions into consideration to ultimately determine the collectibility of the amounts billed. To the extent the amounts, based on management’s estimates, may not be collectible, revenue recognition is deferred until such point as the uncertainty is resolved.

Accounting Standards Updates—In November 2024, the FASB issued guidance which is intended to improve the disclosures about a public business entity’s expenses, primarily through additional disclosures about the types of expenses (including purchases of inventory, employee compensation, depreciation, amortization, and depletion) included in each relevant expense caption presented on the face of the income statement within continuing operations. The guidance is effective on a prospective basis, with the option for retrospective application, for annual periods beginning after December 15, 2026 and interim reporting periods beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the impact of this guidance on its consolidated financial statements and related disclosures.

In November 2025, the FASB issued guidance which is intended to more closely align hedge accounting with the economics of an entity’s risk management activities. The amendments are intended to better reflect those strategies in financial reporting by enabling entities to achieve and maintain hedge accounting for highly effective economic hedges of forecasted transactions. The guidance is effective on a prospective basis for annual periods beginning after December 15, 2026, and interim reporting periods within those annual reporting periods. The Company is currently evaluating the impact of this guidance on its consolidated financial statements and related disclosures.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustments, tax (benefit) expense	$ (0.1)	$ 0.6	$ (0.2)	$ 0.6

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Statement of Comprehensive Income [Abstract]
Net income	$ 887.5	$ 380.5	$ 1,766.0	$ 879.1
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax (benefit) expense of $(0.1), $0.6, $(0.2) and $0.6, respectively	101.5	877.8	48.6	1,471.4
Other comprehensive income	101.5	877.8	48.6	1,471.4
Comprehensive income	989.0	1,258.3	1,814.6	2,350.5
Comprehensive loss (income) attributable to noncontrolling interests	22.8	(337.2)	67.2	(500.1)
Comprehensive income attributable to American Tower Corporation stockholders	$ 1,011.8	$ 921.1	$ 1,881.8	$ 1,850.4

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References + Details

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 20
-SubTopic 10
-Topic 810
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481231/810-10-45-20

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(23))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(25))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(21))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 21
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481231/810-10-45-21

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-1A

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-1B

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4K
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481175/810-10-55-4K

+ Details

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References + Details

- Definition

+ References + Details

- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 14A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-6

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481694/830-30-45-17

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(19))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482765/220-10-50-4

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482765/220-10-50-5

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 20
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481694/830-30-45-20

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(21))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(23))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-1B

Reference 13: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 55
-Paragraph 15
-SubTopic 10
-Topic 220
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482739/220-10-55-15

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-1A

+ Details

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480070/505-10-S50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 946
-SubTopic 830
-Name Accounting Standards Codification
-Section 55
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479168/946-830-55-11

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482705/350-40-65-4

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (e)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479719/606-10-65-2

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 205
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483499/205-20-50-7

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 205
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483499/205-20-50-5A

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Topic 205
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 3A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483475/205-20-45-3A

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478671/942-235-S50-1

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 9
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479343/105-10-65-9

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 17
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480336/718-10-65-17

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-6

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 60
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476176/805-60-65-1

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(B))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(A))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480175/815-40-65-1

Reference 26: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iii)(A))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iv))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-8

Reference 31: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-9

Reference 32: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iv))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 33: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 34: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 205
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478009/946-205-45-3

Reference 35: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section 45
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479105/946-220-45-7

Reference 36: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(16))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1

Reference 37: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(9))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 38: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(1)(d))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3

Reference 39: http://www.xbrl.org/2003/role/disclosureRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 19
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481231/810-10-45-19

Reference 40: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482765/220-10-50-6

Reference 41: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 42: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 43: http://www.xbrl.org/2003/role/exampleRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 4J
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481175/810-10-55-4J

Reference 44: http://www.xbrl.org/2003/role/exampleRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 4K
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481175/810-10-55-4K

Reference 45: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-1A

Reference 46: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-1B

Reference 47: http://www.xbrl.org/2003/role/disclosureRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-1A

Reference 48: http://www.xbrl.org/2003/role/disclosureRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-1A

Reference 49: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (f)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481538/470-20-65-4

+ Details

EQUITY - Distributions (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Jul. 13, 2026	Jun. 30, 2026	Mar. 31, 2026	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025
Class of Stock [Line Items]
Distribution per share (in dollars per share)		$ 1.79	$ 1.70	$ 1.70	$ 1.70	$ 1.62
Aggregate Payment Amount		$ 833.9	$ 792.9	$ 796.0	$ 795.8	$ 757.1
Subsequent Event
Class of Stock [Line Items]
Distribution per share (in dollars per share)	$ 1.79
Aggregate Payment Amount	$ 834.1

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-5

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480070/505-10-S50-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480070/505-10-S50-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-11

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-5

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-3

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(19))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-13

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-11

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(27)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A

Reference 25: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 480
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479857/480-10-S50-1

Reference 27: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 272
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483014/272-10-45-3

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 272
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482987/272-10-50-1

Reference 29: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(d))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 31: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 32: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 33: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-14

Reference 34: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3

Reference 35: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3

Reference 36: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(2)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3

Reference 37: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(2)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3

+ Details

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2026	Dec. 31, 2025
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	480,163,000	479,358,000
Common stock, shares outstanding (in shares)	465,959,000	466,318,000
Treasury stock, shares (in shares)	14,204,000	13,040,000

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.6-05(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479170/946-210-S99-2

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(4)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04(16)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(7))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3

+ Details

PREPAID AND OTHER CURRENT ASSETS (Tables)

6 Months Ended

Jun. 30, 2026

Prepaid Expense and Other Assets, Current [Abstract]

Schedule of Prepaid and Other Current Assets

Prepaid and other current assets consisted of the following:


	As of
	June 30, 2026		December 31, 2025
Prepaid assets	$	109.6	$	80.7
Prepaid income tax	127.2		66.7

Unbilled receivables	200.4		194.8
Value added tax and other consumption tax receivables	38.3		44.5
Other miscellaneous current assets	103.4		99.6
Prepaid and other current assets	$	578.9	$	486.3

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)	6 Months Ended
	Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Principles of Consolidation and Basis of Presentation	Principles of Consolidation and Basis of Presentation—The accompanying consolidated and condensed consolidated financial statements include the accounts of the Company and those entities in which it has a controlling interest. Investments in entities that the Company does not control are accounted for using the equity method or as investments in equity securities, depending upon the Company’s ability to exercise significant influence over operating and financial policies. All intercompany accounts and transactions have been eliminated.
Revenue	Revenue—The Company’s revenue is derived from leasing the right to use its communications sites, the land on which the sites are located, the land underlying its customers’ sites and the space in its data center facilities (the “lease component”) and from the reimbursement of costs incurred by the Company in operating the communications sites and data center facilities and supporting its customers’ equipment as well as other services and contractual rights (the “non-lease component”). Most of the Company’s revenue is derived from leasing arrangements and is accounted for as lease revenue unless the timing and pattern of revenue recognition of the non-lease component differs from the lease component. If the timing and pattern of the non-lease component revenue recognition differs from that of the lease component, the Company separately determines the stand-alone selling prices and pattern of revenue recognition for each performance obligation. Revenue related to distributed antenna system (“DAS”) networks and fiber and other related assets results from agreements with customers that are generally not accounted for as leases. Non-lease property revenue—Non-lease property revenue consists primarily of revenue generated from DAS networks, fiber and other property related revenue. DAS networks and fiber arrangements generally require that the Company provide the tenant the right to use available capacity on the applicable communications infrastructure. Performance obligations are satisfied over time for the duration of the arrangements. Non-lease property revenue also includes revenue generated from interconnection offerings in the Company’s data center facilities. Interconnection offerings are generally contracted on a month-to-month basis and are cancellable by the Company or the data center customer at any time. Performance obligations are satisfied over time for the duration of the arrangements. Other property related revenue streams, which include site inspections, are not material on either an individual or consolidated basis. There were no material changes in the receivables, contract assets and contract liabilities from contracts with customers for the three and six months ended June 30, 2026. Services revenue—The Company offers tower-related services in the United States. These services include site application, zoning and permitting (“AZP”), structural and mount analyses, and construction management services, together with program management offerings that support customer deployment needs from project scoping through construction. There is a single performance obligation related to AZP and construction management, and revenue is recognized over time based on milestones achieved, which are determined based on costs expected to be incurred. Structural and mount analyses services may have more than one performance obligation, contingent upon the number of contracted services. Revenue is recognized at the point in time the services are completed.
Accounting Standards Updates	Accounting Standards Updates—In November 2024, the FASB issued guidance which is intended to improve the disclosures about a public business entity’s expenses, primarily through additional disclosures about the types of expenses (including purchases of inventory, employee compensation, depreciation, amortization, and depletion) included in each relevant expense caption presented on the face of the income statement within continuing operations. The guidance is effective on a prospective basis, with the option for retrospective application, for annual periods beginning after December 15, 2026 and interim reporting periods beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the impact of this guidance on its consolidated financial statements and related disclosures. In November 2025, the FASB issued guidance which is intended to more closely align hedge accounting with the economics of an entity’s risk management activities. The amendments are intended to better reflect those strategies in financial reporting by enabling entities to achieve and maintain hedge accounting for highly effective economic hedges of forecasted transactions. The guidance is effective on a prospective basis for annual periods beginning after December 15, 2026, and interim reporting periods within those annual reporting periods. The Company is currently evaluating the impact of this guidance on its consolidated financial statements and related disclosures.

- Definition

Disclosure of accounting policy for revenue from contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 19
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-19

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-18

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-18

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-20

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-20

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-20

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-20

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (e)
-SubTopic 10
-Topic 235
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483426/235-10-50-4

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/606/tableOfContent

+ Details

INCOME TAXES

6 Months Ended

Jun. 30, 2026

Income Tax Disclosure [Abstract]

INCOME TAXES

The Company provides for income taxes at the end of each interim period based on the estimated effective tax rate (“ETR”) for the full fiscal year. Cumulative adjustments to the Company’s estimate are recorded in the interim period in which a change in the estimated annual ETR is determined. Under the provisions of the Internal Revenue Code of 1986, as amended, the Company may deduct earnings distributed to stockholders against the income generated by its real estate investment trust (“REIT”) operations. The Company continues to be subject to income taxes on the income of its domestic taxable REIT subsidiaries and income taxes in foreign jurisdictions where it conducts operations.

The Company provides valuation allowances if, based on the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. Management assesses the available evidence to estimate if sufficient future taxable income will be generated to use the existing deferred tax assets. Valuation allowances may be reversed if, based on changes in facts and circumstances, the net deferred tax assets have been determined to be realizable.

The decrease in the income tax provision during the three months ended June 30, 2026 was primarily attributable to unrealized gains from equity securities in the United States and the accrual of taxes related to the anticipated repatriation of funds from certain foreign subsidiaries during the three months ended June 30, 2025, partially offset by an increase in earnings in certain foreign jurisdictions during the three months ended June 30, 2026. The increase in the income tax provision during the six months ended June 30, 2026 was primarily attributable to an increase in earnings in certain foreign jurisdictions, partially offset by unrealized gains from equity securities in the United States and taxes related to the sale of the Company’s fiber assets in South Africa (“South Africa Fiber”) during the six months ended June 30, 2025.

As of June 30, 2026 and December 31, 2025, the total unrecognized tax benefits that would impact the ETR, if recognized, were approximately $134.2 million and $128.6 million, respectively. The amount of unrecognized tax benefits during the three and six months ended June 30, 2026 includes (i) additions to the Company’s existing tax positions of $4.8 million and $6.4 million, respectively, and (ii) additions due to foreign currency exchange rate fluctuations of $2.1 million and $3.0 million, respectively, and for both the three and six months ended June 30, 2026 (iii) reductions of existing tax positions of $2.1 million, (iv) reductions due to the expiration of statue of limitations of $0.3 million and (v) reductions due to settlements of $1.4 million.

The Company recorded the following penalties and income tax-related interest expense during the three and six months ended June 30, 2026 and 2025:


	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
Penalties and income tax-related interest expense	$	7.9	$	5.8	$	13.8	$	11.3

As of June 30, 2026 and December 31, 2025, the total amount of accrued income tax related interest and penalties included in the consolidated balance sheets were $103.0 million and $86.8 million, respectively.

- Definition

The entire disclosure for income tax.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477617/942-740-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478822/944-740-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12C

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12B

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 270
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477891/740-270-50-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.5.Q1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479360/740-10-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-13

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/740/tableOfContent

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-14

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-21

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 17
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-17

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479360/740-10-S99-2

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482603/740-30-50-2

+ Details

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Tables)

6 Months Ended

Jun. 30, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Cash and Cash Equivalents

The reconciliation of cash and cash equivalents and restricted cash reported within the applicable balance sheet that sum to the total of the same such amounts shown in the statements of cash flows is as follows:


	Six Months Ended June 30,
	2026		2025
Cash and cash equivalents	$	1,762.5	$	2,076.0
Restricted cash	130.1		133.6


Total cash, cash equivalents and restricted cash	$	1,892.6	$	2,209.6

Schedule of Restricted Cash


	Six Months Ended June 30,
	2026		2025
Cash and cash equivalents	$	1,762.5	$	2,076.0
Restricted cash	130.1		133.6


Total cash, cash equivalents and restricted cash	$	1,892.6	$	2,209.6

Schedule of Revenue Disaggregated by Source and Geography

A summary of revenue disaggregated by source and geography is as follows:


Three Months Ended June 30, 2026	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers		Total
Non-lease property revenue	$	75.2	$	2.2	$	3.4	$	26.8	$	42.2	$	149.8
Services revenue	61.3		—		—		—		—		61.3
Total non-lease revenue	$	136.5	$	2.2	$	3.4	$	26.8	$	42.2	$	211.1
Property lease revenue	1,199.2		413.1		256.0		414.8		254.9		2,538.0
Total revenue	$	1,335.7	$	415.3	$	259.4	$	441.6	$	297.1	$	2,749.1


Three Months Ended June 30, 2025	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers		Total
Non-lease property revenue	$	72.5	$	3.4	$	3.4	$	28.1	$	36.8	$	144.2
Services revenue	99.5		—		—		—		—		99.5
Total non-lease revenue	$	172.0	$	3.4	$	3.4	$	28.1	$	36.8	$	243.7
Property lease revenue	1,234.6		332.9		229.3		361.3		225.1		2,383.2
Total revenue	$	1,406.6	$	336.3	$	232.7	$	389.4	$	261.9	$	2,626.9


Six Months Ended June 30, 2026	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers		Total
Non-lease property revenue	$	144.4	$	6.3	$	7.0	$	57.2	$	83.4	$	298.3
Services revenue	128.9		—		—		—		—		128.9
Total non-lease revenue	$	273.3	$	6.3	$	7.0	$	57.2	$	83.4	$	427.2
Property lease revenue	2,391.6		787.6		513.1		864.5		502.6		5,059.4
Total revenue	$	2,664.9	$	793.9	$	520.1	$	921.7	$	586.0	$	5,486.6


Six Months Ended June 30, 2025	U.S. & Canada		Africa & APAC		Europe		Latin America		Data Centers		Total
Non-lease property revenue	$	147.2	$	15.4	$	6.2	$	54.1	$	72.7	$	295.6
Services revenue	174.1		—		—		—		—		174.1
Total non-lease revenue	$	321.3	$	15.4	$	6.2	$	54.1	$	72.7	$	469.7
Property lease revenue	2,458.2		654.5		439.5		734.5		433.3		4,720.0
Total revenue	$	2,779.5	$	669.9	$	445.7	$	788.6	$	506.0	$	5,189.7

CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Income Statement [Abstract]
Foreign currency gains (losses)	$ 42.1	$ (484.0)	$ 110.2	$ (829.7)

COMMITMENTS AND CONTINGENCIES (Details) $ in Millions		6 Months Ended
COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	Mar. 27, 2015 renewalPeriod	Jun. 30, 2026 USD ($) site renewalPeriod
AT&T Transaction
Loss Contingencies [Line Items]
Number of sites acquired		120
Purchase price \| $		$ 102.1
Verizon Transaction
Loss Contingencies [Line Items]
Leased assets, number of communication sites (more than)		11,100
Right to lease, weighted average term	28 years
Aggregate purchase option price for towers \| $		$ 5,000.0
Customer lease, initial term	10 years
Lease renewal term	5 years
Successive terms to renew lease \| renewalPeriod	7
AT&T Transaction
Loss Contingencies [Line Items]
Leased assets, number of communication sites (more than)		1,500
Aggregate purchase option price for towers \| $		$ 1,100.0
Lease renewal term		5 years
Successive terms to renew lease \| renewalPeriod		5
Operating lease, term of contract		27 years
Leased assets, number of communication sites purchased		900

FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Jun. 30, 2026

Fair Value Disclosures [Abstract]

Schedule of Fair Value Level of Inputs

Below are the three levels of inputs that may be used to measure fair value:


			Level 1			Quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.

			Level 2			Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

			Level 3			Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Key assumptions used to apply this pricing model were as follows:


	2026		2025		2024

Expected term (years)	2.81		2.81		2.81
Risk-free interest rate	3.58	%	3.91	%	4.31	%
Annualized volatility	25.42	%	27.91	%	26.75	%

Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis

The fair values of the Company’s financial assets and liabilities that are required to be measured on a recurring basis at fair value were as follows:


	June 30, 2026					December 31, 2025
	Fair Value Measurements Using					Fair Value Measurements Using
	Level 1		Level 2		Level 3	Level 1		Level 2		Level 3
Assets:

Investments in equity securities (1)	$	18.8	$	194.5	—	$	15.3	$	161.6	—

_______________

Schedule of Contractual Amounts of Outstanding Instruments

The following table presents the contractual amounts of the Company's outstanding instruments:


		As of
	Designation	June 30, 2026		December 31, 2025
Foreign currency-denominated debt (1)	Net Investment Hedge	$	5,368.4	$	5,461.6

_______________

EQUITY - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
EQUITY - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025	Dec. 31, 2017
Share Repurchase Program [Line Items]
Proceeds from stock options and ESPP		$ 21.0	$ 30.1
Treasury stock repurchased value	$ 19.2	$ 202.9
Treasury stock, shares (in shares)	14,204,000	14,204,000		13,040,000
Treasury stock repurchased amount	$ 1,868.7	$ 1,868.7		$ 1,665.8
Accrued dividend RSU	$ 11.8	11.8
Paid dividend RSU		$ 14.3	$ 11.8
Buyback Program
Share Repurchase Program [Line Items]
Stock repurchase program, authorized amount					$ 2,000.0
Treasury stock repurchases (in shares)		1,164,378
Treasury stock repurchased value		$ 202.9
Treasury stock, shares (in shares)	3,105,690	3,105,690
Treasury stock repurchased amount	$ 550.0	$ 550.0

LONG-TERM OBLIGATIONS - Repayments of Senior Notes (Details) € in Millions, $ in Millions						3 Months Ended		6 Months Ended
	Jun. 18, 2026 USD ($)	Jun. 18, 2026 EUR (€)	May 21, 2026 USD ($)	Apr. 14, 2026 USD ($)	Feb. 13, 2026 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 17, 2026 USD ($)	Jun. 17, 2026 EUR (€)	Dec. 31, 2025 USD ($)
Debt Instrument [Line Items]
Accrued and unpaid interest						$ 330.5		$ 330.5				$ 425.2
Loss on retirement of long-term obligations						3.2	$ 0.0	3.2	$ 0.0
American Tower Corporation
Debt Instrument [Line Items]
Debt outstanding						35,379.7		35,379.7				$ 35,409.2
American Tower Corporation \| Senior notes \| 4.400% senior notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)					4.40%							4.40%
Aggregate principal amount repaid					$ 500.0
Debt outstanding						0.0		0.0				$ 499.9
American Tower Corporation \| Senior notes \| 1.600% senior notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)				1.60%								1.60%
Aggregate principal amount repaid				$ 700.0
Debt outstanding				$ 0.0		0.0		0.0				$ 699.7
American Tower Corporation \| Senior notes \| 1.950% senior notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)			1.95%									1.95%
Aggregate principal amount repaid			$ 500.0
Debt outstanding			$ 0.0			$ 0.0		$ 0.0				$ 586.9
American Tower Corporation \| Senior notes \| 4.125% senior notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)		4.125%				4.125%		4.125%
Aggregate principal amount repaid \| €		€ 250.0
Debt outstanding						$ 399.2		$ 399.2				$ 703.1
Redemption price percentage	100.969%	100.969%
Debt instrument, repurchase amount including interest	$ 290.2	€ 253.3
Accrued and unpaid interest										$ 1.0	€ 0.9
Loss on retirement of long-term obligations	3.2
Loss on retirement due to prepayment consideration	$ 2.8
Outstanding principal balance \| €		€ 350.0

STOCK-BASED COMPENSATION - Summary of the Company's Option Activity (Details)	6 Months Ended
	Jun. 30, 2026 shares
Number of Options
Outstanding at beginning of period (in shares)	133,623
Exercised (in shares)	(133,623)
Forfeited (in shares)	0
Expired (in shares)	0
Outstanding at end of period (in shares)	0

- Definition

Number of share options (or share units) exercised during the current period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480070/505-10-S50-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-3

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-2

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(19))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-11

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(02)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

NONCONTROLLING INTERESTS

6 Months Ended

Jun. 30, 2026

Noncontrolling Interest [Abstract]

NONCONTROLLING INTERESTS

European Interests—As of June 30, 2026, ATC Europe consists of the Company’s operations in France, Germany and Spain. The Company currently holds a 52% controlling interest in ATC Europe, with Caisse de dépôt et placement du Québec (“La Caisse”) and Allianz insurance companies and funds managed by Allianz Capital Partners GmbH, including the Allianz European Infrastructure Fund (collectively, “Allianz”) holding 30% and 18% noncontrolling interests, respectively. ATC Europe holds a 100% interest in the subsidiaries that consist of the Company’s operations in France and an 87% and an 83% controlling interest in the subsidiaries that consist of the Company’s operations in Germany and Spain, respectively, with PGGM holding a 13% and a 17% noncontrolling interest in each respective subsidiary.

Bangladesh Partnership—In 2021, the Company acquired a 51% controlling interest in KTBL. Confidence Tower Holdings Ltd. (“Confidence Group”) held a 49% noncontrolling interest in KTBL. On June 29, 2026, the Company completed the sale of its interest in KTBL to Confidence Group.

Stonepeak Transaction—In 2022, the Company entered into agreements pursuant to which certain investment vehicles affiliated with Stonepeak Partners LP (such investment vehicles, collectively, “Stonepeak”) acquired a noncontrolling ownership interest in the Company’s U.S. data center business, through an investment in common equity and mandatorily convertible preferred equity.

As of June 30, 2026, the Company holds a common equity interest of approximately 71% in its U.S. data center business, with Stonepeak holding approximately 29% of the outstanding common equity and 100% of the outstanding mandatorily convertible preferred equity. On a fully converted basis, which is expected to occur in August 2026, and on the basis of the currently outstanding equity, the Company will hold a controlling ownership interest of approximately 64%, with Stonepeak holding approximately 36%. The mandatorily convertible preferred equity, which accrues dividends at 5.0% through the August 2026 conversion date, will convert into common equity on a one for one basis, subject to adjustment that will be measured upon conversion.

Dividends to noncontrolling interests—Certain of the Company’s subsidiaries may, from time to time, declare dividends. During the six months ended June 30, 2026, the Company’s U.S. data center business declared distributions of $22.8 million related to the outstanding Stonepeak mandatorily convertible preferred equity (the “Stonepeak Preferred Distributions”). As of June 30, 2026, the amount accrued for Stonepeak Preferred Distributions was $11.5 million.

Pursuant to the terms of the ownership agreement with Stonepeak, the Company’s U.S. data center business distributes common dividends to the Company and to Stonepeak in proportion to their respective equity interests in the Company’s U.S. data center business (the “Stonepeak Common Dividend”) on a quarterly basis. During the six months ended June 30, 2026, the Company’s U.S. data center business declared and paid distributions of $36.4 million, related to the Stonepeak Common Dividend.

During the six months ended June 30, 2026, pursuant to the terms of the ownership agreements, ATC Europe C.V., one of the Company’s subsidiaries in the Netherlands, declared and paid a dividend of 41.4 million EUR (approximately $47.1 million at the date of payment) to the Company, La Caisse and Allianz in proportion to their respective equity interests in ATC Europe C.V.

During the six months ended June 30, 2026, pursuant to the terms of the ownership agreements, AT Iberia C.V., one of the Company’s subsidiaries in Spain, declared and paid a dividend of 67.6 million EUR (approximately $77.0 million at the date of payment) to ATC Europe and PGGM in proportion to their respective equity interests in AT Iberia C.V.

The changes in noncontrolling interests were as follows:


	Six Months Ended June 30,
	2026		2025
Balance as of January 1,	$	6,702.8	$	6,266.5
Impact of sale of Bangladesh partnership on noncontrolling interests	(13.2)		—
Net income attributable to noncontrolling interests	39.0		23.6
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax	(106.2)		476.5
Contributions from noncontrolling interest holders	4.3		111.3
Distributions to noncontrolling interest holders	(93.9)		(111.8)
Balance as of June 30,	$	6,532.8	$	6,766.1