American Tower (AMT) 10-Q 28 Jul 22 2022 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2022	Jul. 21, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
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	116 Huntington Avenue
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 (in shares)		465,586,908
Entity Central Index Key	0001053507
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
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
1.375% Senior Notes due 2025
Document Information [Line Items]
Title of 12(b) Security	1.375% Senior Notes due 2025
Trading Symbol	AMT 25A
Security Exchange Name	NYSE
1.950% Senior Notes due 2026
Document Information [Line Items]
Title of 12(b) Security	1.950% Senior Notes due 2026
Trading Symbol	AMT 26B
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
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
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
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

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
CURRENT ASSETS:
Cash and cash equivalents	$ 2,066.7	$ 1,949.9
Restricted cash	136.4	393.4
Accounts receivable, net	792.7	728.9
Prepaid and other current assets	729.8	657.2
Total current assets	3,725.6	3,729.4
PROPERTY AND EQUIPMENT, net	19,716	19,784
GOODWILL	12,969.5	13,350.1
OTHER INTANGIBLE ASSETS, net	19,225.6	20,727.2
DEFERRED TAX ASSET	132.6	131.6
DEFERRED RENT ASSET	2,760.9	2,539.6
RIGHT-OF-USE ASSET	9,159.2	9,225.1
NOTES RECEIVABLE AND OTHER NON-CURRENT ASSETS	427.4	400.9
TOTAL	68,116.8	69,887.9
CURRENT LIABILITIES:
Accounts payable	194.5	272.4
Accrued expenses	1,262.2	1,412.8
Distributions payable	672.5	642.1
Accrued interest	236.6	254.7
Current portion of operating lease liability	762.6	712.6
Current portion of long-term obligations	3,603.9	4,568.7
Unearned revenue	729.4	1,204
Total current liabilities	7,461.7	9,067.3
LONG-TERM OBLIGATIONS	37,240.1	38,685.5
OPERATING LEASE LIABILITY	7,862	8,041.8
ASSET RETIREMENT OBLIGATIONS	2,029.7	2,003
DEFERRED TAX LIABILITY	1,604.9	1,830.9
OTHER NON-CURRENT LIABILITIES	1,192.2	1,189.8
Total liabilities	57,390.6	60,818.3
COMMITMENTS AND CONTINGENCIES
EQUITY (shares in thousands):
Common stock: $.01 par value; 1,000,000 shares authorized; 476,500 and 466,687 shares issued; and 465,585 and 455,772 shares outstanding, respectively	4.8	4.7
Additional paid-in capital	14,606.8	12,240.2
Distributions in excess of earnings	(842.3)	(1,142.4)
Accumulated other comprehensive loss	(5,528.2)	(4,738.9)
Treasury stock (10,915 shares at cost)	(1,282.4)	(1,282.4)
Total American Tower Corporation equity	6,958.7	5,081.2
Noncontrolling interests	3,767.5	3,988.4
Total equity	10,726.2	9,069.6
TOTAL	$ 68,116.8	$ 69,887.9

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares shares in Thousands	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000	1,000,000
Common stock, shares issued (in shares)	476,500	466,687
Common stock, shares outstanding (in shares)	465,585	455,772
Treasury stock, shares (in shares)	10,915	10,915

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
REVENUES:
Total operating revenues	$ 2,674.3	$ 2,298.9	$ 5,334.6	$ 4,457.4
Costs of operations (exclusive of items shown separately below):
Property	794	623.3	1,565.5	1,186.6
Depreciation, amortization and accretion	826.5	554.8	1,642.3	1,077.3
Selling, general, administrative and development expense	222.9	207.2	516.8	389.8
Other operating expenses	19.7	39.8	45.8	90.2
Total operating expenses	1,892	1,449.7	3,827.2	2,779.5
OPERATING INCOME	782.3	849.2	1,507.4	1,677.9
OTHER INCOME (EXPENSE):
Interest income	14.3	7.6	24.2	19
Interest expense	(276.6)	(213.7)	(539)	(420.7)
Loss on retirement of long-term obligations	0	0	0	(25.7)
Other income (including foreign currency gains of $394.7, $146.9, $636.8 and $241.6 respectively)	378.3	177.6	630.9	272.8
Total other income (expense)	116	(28.5)	116.1	(154.6)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	898.3	820.7	1,623.5	1,523.3
Income tax provision	(7.4)	(72.8)	(29.9)	(123.1)
NET INCOME	890.9	747.9	1,593.6	1,400.2
Net loss (income) attributable to noncontrolling interests	7.3	(1.6)	16.3	(8.9)
NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS	$ 898.2	$ 746.3	$ 1,609.9	$ 1,391.3
NET INCOME PER COMMON SHARE AMOUNTS:
Basic net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 1.96	$ 1.66	$ 3.52	$ 3.11
Diluted net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 1.95	$ 1.65	$ 3.51	$ 3.10
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING (in thousands):
BASIC (in shares)	458,776	450,617	457,369	447,569
DILUTED (in shares)	459,819	452,354	458,564	449,390
Property
REVENUES:
Total operating revenues	$ 2,614.5	$ 2,233	$ 5,215.3	$ 4,362.7
Services
REVENUES:
Total operating revenues	59.8	65.9	119.3	94.7
Costs of operations (exclusive of items shown separately below):
Services	$ 28.9	$ 24.6	$ 56.8	$ 35.6

CONSOLIDATED STATEMENTS OF OP_2

CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Foreign currency (losses) gains	$ 394.7	$ 146.9	$ 636.8	$ 241.6

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 890.9	$ 747.9	$ 1,593.6	$ 1,400.2
Other comprehensive income (loss):
Changes in fair value of cash flow hedges, each net of tax expense of $0	0	0	0	0
Reclassification of unrealized losses on cash flow hedges to net income, each net of tax expense of $0	0	0.1	0	0.1
Foreign currency translation adjustments, net of tax benefit of $(0.2), $(0.0), $(0.2) and $(0.0), respectively.	(1,136.4)	118.8	(1,042)	(204.9)
Other comprehensive (loss) income	(1,136.4)	118.9	(1,042)	(204.8)
Comprehensive (loss) income	(245.5)	866.8	551.6	1,195.4
Comprehensive loss (income) attributable to noncontrolling interests	168.5	(9.2)	269	4.9
Allocation of accumulated other comprehensive income resulting from purchases of noncontrolling interest and redeemable noncontrolling interests	0	47.4	0	47.5
Comprehensive (loss) income attributable to American Tower Corporation stockholders	$ (77)	$ 905	$ 820.6	$ 1,247.8

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Changes in fair value of cash flow hedges, tax	$ 0	$ 0	$ 0	$ 0
Reclassification of unrealized gains on cash flow hedges to net income, tax	0	0	0	0
Foreign currency translation adjustments, tax expense (benefit)	$ (0.2)	$ 0	$ (0.2)	$ 0

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,593.6	$ 1,400.2
Adjustments to reconcile net income to cash provided by operating activities
Depreciation, amortization and accretion	1,642.3	1,077.3
Stock-based compensation expense	98.9	69.9
Loss on early retirement of long-term obligations	0	25.7
Other non-cash items reflected in statements of operations	(655.5)	(209.1)
Increase in net deferred rent balances	(222.7)	(224.7)
Right-of-use asset and Operating lease liability, net	(7.1)	14.7
Changes in unearned revenue	(495.3)	111.2
Increase in assets	(240.3)	(219.6)
Decrease in liabilities	(135)	(1)
Cash provided by operating activities	1,578.9	2,044.6
CASH FLOWS FROM INVESTING ACTIVITIES
Payments for purchase of property and equipment and construction activities	(756.2)	(602.7)
Payments for acquisitions, net of cash acquired	(218.3)	(8,882.6)
Proceeds from sale of short-term investments and other non-current assets	9.2	7.9
Payment for investments in equity securities	0	(25)
Deposits and other	61.8	(3.2)
Cash used for investing activities	(903.5)	(9,505.6)
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowings under credit facilities	2,900	6,511.8
Proceeds from issuance of senior notes, net	1,293.6	3,828
Proceeds from term loans	0	2,347
Repayments of notes payable, credit facilities, senior notes, secured debt, term loans and finance leases	(5,954)	(6,008.4)
Distributions to noncontrolling interest holders	(0.1)	(225.7)
Contributions from noncontrolling interest holders	48.4	0
Proceeds from stock options and employee stock purchase plan	19.8	26.6
Distributions paid on common stock	(1,280.1)	(1,096.4)
Proceeds from the issuance of common stock, net	2,291.7	2,361.8
Payment for early retirement of long-term obligations	0	(61.9)
Deferred financing costs and other financing activities	(74.7)	(93.3)
Purchase of redeemable noncontrolling interest	0	(2.5)
Cash (used for) provided by financing activities	(755.4)	7,587
Net effect of changes in foreign currency exchange rates on cash and cash equivalents, and restricted cash	(60.2)	13.4
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH	(140.2)	139.4
CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH, BEGINNING OF PERIOD	2,343.3	1,861.4
CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH, END OF PERIOD	2,203.1	2,000.8
CASH PAID FOR INCOME TAXES (NET OF REFUNDS OF $4.9 AND $32.4, RESPECTIVELY)	181.4	62.2
CASH PAID FOR INTEREST	529.9	388.9
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Purchases of property and equipment under finance leases and perpetual easements	10.3	28.1
Decrease in accounts payable and accrued expenses for purchases of property and equipment and construction activities	$ (35.4)	$ (27.1)

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Statement of Cash Flows [Abstract]
Income tax refunds	$ 4.9	$ 32.4

CONSOLIDATED STATEMENTS OF EQUI

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, common stock (shares) at Dec. 31, 2020		455,245
Balance at beginning of period at Dec. 31, 2020	$ 4,568.4	$ 4.6	$ (1,282.4)	$ 10,473.7	$ (3,759.4)	$ (1,343)	$ 474.9
Balance at beginning of period, treasury stock (shares) at Dec. 31, 2020			(10,915)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity (shares)		737
Stock-based compensation related activity	38.4	$ 0		38.4
Issuance of common stock-stock purchase plan (in shares)		38
Issuance of common stock-stock purchase plan	7.7	$ 0		7.7
Issuance of common stock (in shares)		9,900
Issuance of common stock	2,361.8	$ 0.1		2,361.7
Changes in fair value of cash flow hedges, net of tax	0				0
Reclassification of unrealized losses on cash flow hedges to net income, net of tax	0.1				0.1
Foreign currency translation adjustment, net of tax	(201.2)				(191.1)		(10.1)
Adjustment to noncontrolling interest	0			(648.4)	47.4		601
Contributions from noncontrolling interest holders							0
Distributions to noncontrolling interest holders	(215.2)			(214.9)			(0.3)
Redemption of noncontrolling interest (shares)		26
Redemption of noncontrolling interest	0	$ 0		1.7			(1.7)
Purchase of redeemable noncontrolling interest	0			(0.1)	0.1
Common stock distributions declared	(1,133.3)					(1,133.3)
Net income (loss)	1,396.7					1,391.3	5.4
Balance at end of period, common stock (shares) at Jun. 30, 2021		465,946
Balance at end of period at Jun. 30, 2021	6,823.4	$ 4.7	$ (1,282.4)	12,019.8	(3,902.9)	(1,085)	1,069.2
Balance at end of period, treasury stock (shares) at Jun. 30, 2021			(10,915)
Balance at beginning of period, common stock (shares) at Mar. 31, 2021		455,708
Balance at beginning of period at Mar. 31, 2021	4,338.9	$ 4.6	$ (1,282.4)	10,474.6	(4,061.6)	(1,251.8)	455.5
Balance at beginning of period, treasury stock (shares) at Mar. 31, 2021			(10,915)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity (shares)		300
Stock-based compensation related activity	39.1	$ 0		39.1
Issuance of common stock-stock purchase plan (in shares)		38
Issuance of common stock-stock purchase plan	7.7	$ 0		7.7
Issuance of common stock (in shares)		9,900
Issuance of common stock	2,361.8	$ 0.1		2,361.7
Changes in fair value of cash flow hedges, net of tax	0				0
Reclassification of unrealized losses on cash flow hedges to net income, net of tax	0.1				0.1
Foreign currency translation adjustment, net of tax	122.3				111.2		11.1
Adjustment to noncontrolling interest	0			(648.4)	47.4		601
Distributions to noncontrolling interest holders	(214.9)			(214.9)
Common stock distributions declared	(579.5)					(579.5)
Net income (loss)	747.9					746.3	1.6
Balance at end of period, common stock (shares) at Jun. 30, 2021		465,946
Balance at end of period at Jun. 30, 2021	$ 6,823.4	$ 4.7	$ (1,282.4)	12,019.8	(3,902.9)	(1,085)	1,069.2
Balance at end of period, treasury stock (shares) at Jun. 30, 2021			(10,915)
Balance at beginning of period, common stock (shares) at Dec. 31, 2021	455,772	466,687
Balance at beginning of period at Dec. 31, 2021	$ 9,069.6	$ 4.7	$ (1,282.4)	12,240.2	(4,738.9)	(1,142.4)	3,988.4
Balance at beginning of period, treasury stock (shares) at Dec. 31, 2021			(10,915)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity (shares)		590
Stock-based compensation related activity	66.7	$ 0		66.7
Issuance of common stock-stock purchase plan (in shares)		38
Issuance of common stock-stock purchase plan	8.3	$ 0		8.3
Issuance of common stock (in shares)		9,185
Issuance of common stock	2,291.7	$ 0.1		2,291.6
Changes in fair value of cash flow hedges, net of tax	0
Reclassification of unrealized losses on cash flow hedges to net income, net of tax	0
Foreign currency translation adjustment, net of tax	(1,042)				(789.3)		(252.7)
Adjustment to noncontrolling interest							0
Contributions from noncontrolling interest holders	48.4						48.4
Distributions to noncontrolling interest holders	(0.3)						(0.3)
Redemption of noncontrolling interest							0
Common stock distributions declared	(1,309.8)					(1,309.8)
Net income (loss)	$ 1,593.6					1,609.9	(16.3)
Balance at end of period, common stock (shares) at Jun. 30, 2022	465,585	476,500
Balance at end of period at Jun. 30, 2022	$ 10,726.2	$ 4.8	$ (1,282.4)	14,606.8	(5,528.2)	(842.3)	3,767.5
Balance at end of period, treasury stock (shares) at Jun. 30, 2022			(10,915)
Balance at beginning of period, common stock (shares) at Mar. 31, 2022		467,192
Balance at beginning of period at Mar. 31, 2022	9,250.7	$ 4.7	$ (1,282.4)	12,266.1	(4,553)	(1,072.4)	3,887.7
Balance at beginning of period, treasury stock (shares) at Mar. 31, 2022			(10,915)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity (shares)		85
Stock-based compensation related activity	40.8	$ 0		40.8
Issuance of common stock-stock purchase plan (in shares)		38
Issuance of common stock-stock purchase plan	8.3	$ 0		8.3
Issuance of common stock (in shares)		9,185
Issuance of common stock	2,291.7	$ 0.1		2,291.6
Changes in fair value of cash flow hedges, net of tax	0
Reclassification of unrealized losses on cash flow hedges to net income, net of tax	0
Foreign currency translation adjustment, net of tax	(1,136.4)				(975.2)		(161.2)
Contributions from noncontrolling interest holders	48.4						48.4
Distributions to noncontrolling interest holders	(0.1)						(0.1)
Common stock distributions declared	(668.1)					(668.1)
Net income (loss)	$ 890.9					898.2	(7.3)
Balance at end of period, common stock (shares) at Jun. 30, 2022	465,585	476,500
Balance at end of period at Jun. 30, 2022	$ 10,726.2	$ 4.8	$ (1,282.4)	$ 14,606.8	$ (5,528.2)	$ (842.3)	$ 3,767.5
Balance at end of period, treasury stock (shares) at Jun. 30, 2022			(10,915)

BASIS OF PRESENTATION AND SIGNI

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES	6 Months Ended
	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES	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 herein. 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, 2021 (the “2021 Form 10-K”). The results of operations for the three and six months ended June 30, 2022 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, 2022, the Company holds (i) a 52% controlling interest in subsidiaries whose holdings consist of the Company’s operations in France, Germany, Poland and Spain (such subsidiaries collectively, “ATC Europe”) (Allianz and CDPQ (each as defined in note 11) hold the noncontrolling interests) and (ii) a 51% controlling interest in a joint venture whose holdings consist of the Company’s operations in Bangladesh (Confidence Tower Holdings Ltd. (“Confidence Group”) holds the noncontrolling interest). As of June 30, 2022, 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 three and six months ended June 30, 2022 and 2021. Change in Reportable Segments —During the fourth quarter of 2021, as a result of the Company’s acquisition of CoreSite Realty Corporation (“CoreSite,” and the acquisition, the “CoreSite Acquisition”), the Company updated its reportable segments to add a Data Centers segment. The Data Centers segment is within the Company’s property operations. The Company now reports its results in seven segments – U.S. & Canada property, Asia-Pacific property, Africa property, Europe property, Latin America property, Data Centers and Services, which are discussed further in note 15. The change in reportable segments had no impact on the Company’s consolidated financial statements for any prior periods. Historical financial information included in this Quarterly Report on Form 10-Q (this “Quarterly Report”) has been adjusted to reflect the change in reportable segments. Significant Accounting Policies —The Company’s significant accounting policies are described in note 1 to the Company’s consolidated financial statements included in the 2021 Form 10-K. There have been no material changes to the Company’s significant accounting policies during the six months ended June 30, 2022. 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, 2022 2021 Cash and cash equivalents $ 2,066.7 $ 1,928.0 Restricted cash 136.4 72.8 Total cash, cash equivalents and restricted cash $ 2,203.1 $ 2,000.8 The increase in restricted cash during the six months ended June 30, 2022 was due to advance payments from a customer received during the year ended December 31, 2021. Revenue —The Company’s revenue is derived from leasing the right to use its communications sites, the land on which the sites are located and 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, 2022. Services revenue —The Company offers tower-related services in the United States. These services include site application, zoning and permitting (“AZP”) and structural analysis. There is a single performance obligation related to AZP and revenue is recognized over time based on milestones achieved, which are determined based on costs expected to be incurred. Structural analysis 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, 2022 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers (1) Total Non-lease property revenue $ 73.8 $ 4.9 $ 7.1 $ 6.8 $ 38.6 $ 26.0 $ 157.2 Services revenue 59.8 — — — — — 59.8 Total non-lease revenue $ 133.6 $ 4.9 $ 7.1 $ 6.8 $ 38.6 $ 26.0 $ 217.0 Property lease revenue 1,162.1 293.1 278.4 172.0 386.6 165.1 2,457.3 Total revenue $ 1,295.7 $ 298.0 $ 285.5 $ 178.8 $ 425.2 $ 191.1 $ 2,674.3 Three Months Ended June 30, 2021 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers (1) Total Non-lease property revenue $ 70.1 $ 1.7 $ 6.3 $ 1.7 $ 33.9 $ — $ 113.7 Services revenue 65.9 — — — — — 65.9 Total non-lease revenue $ 136.0 $ 1.7 $ 6.3 $ 1.7 $ 33.9 $ — $ 179.6 Property lease revenue 1,160.8 296.5 241.7 86.1 331.7 2.5 2,119.3 Total revenue $ 1,296.8 $ 298.2 $ 248.0 $ 87.8 $ 365.6 $ 2.5 $ 2,298.9 Six Months Ended June 30, 2022 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers (1) Total Non-lease property revenue $ 148.0 $ 7.9 $ 14.2 $ 9.2 $ 75.9 $ 51.8 $ 307.0 Services revenue 119.3 — — — — — 119.3 Total non-lease revenue $ 267.3 $ 7.9 $ 14.2 $ 9.2 $ 75.9 $ 51.8 $ 426.3 Property lease revenue 2,320.3 588.6 539.1 368.1 768.6 323.6 4,908.3 Total revenue $ 2,587.6 $ 596.5 $ 553.3 $ 377.3 $ 844.5 $ 375.4 $ 5,334.6 Six Months Ended June 30, 2021 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers (1) Total Non-lease property revenue $ 141.7 $ 4.2 $ 11.2 $ 3.9 $ 65.8 $ — $ 226.8 Services revenue 94.7 — — — — — 94.7 Total non-lease revenue $ 236.4 $ 4.2 $ 11.2 $ 3.9 $ 65.8 $ — $ 321.5 Property lease revenue 2,318.0 575.4 472.5 128.5 636.5 5.0 4,135.9 Total revenue $ 2,554.4 $ 579.6 $ 483.7 $ 132.4 $ 702.3 $ 5.0 $ 4,457.4 _______________ (1) Data Centers consists of the Company’s data center facilities located in the United States. For the three and six months ended June 30, 2021, revenue attributable to the Company’s data center assets previously reported in the U.S. & Canada property segment is now shown in the Data Centers segment. Property revenue for the three months ended June 30, 2022 and 2021 includes straight-line revenue of $113.3 million and $104.8 million, respectively. Property revenue for the six months ended June 30, 2022 and 2021 includes straight-line revenue of $222.7 million and $224.7 million, respectively. Accounting Standards Updates In March 2020, the Financial Accounting Standards Board (the “FASB”) issued guidance to provide optional expedients and exceptions for applying accounting principles generally accepted in the United States to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The guidance applies only to contracts, hedging relationships and other transactions that reference the London Interbank Offered Rate (“LIBOR”) or another reference rate expected to be discontinued because of reference rate reform. The expedients and exceptions provided by the guidance do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022 for which an entity has elected certain optional expedients that are retained through the end of the hedging relationship. In January 2021, the FASB issued additional guidance that clarifies that certain practical expedients and exceptions for contract modifications and hedge accounting apply to derivatives that are affected by reference rate reform. As of June 30, 2022, the Company has not modified any contracts as a result of reference rate reform and is evaluating the impact this standard may have on its financial statements.

PREPAID AND OTHER CURRENT ASSET

PREPAID AND OTHER CURRENT ASSETS	6 Months Ended
	Jun. 30, 2022
Prepaid Expense and Other Assets, Current [Abstract]
PREPAID AND OTHER CURRENT ASSETS	PREPAID AND OTHER CURRENT ASSETS Prepaid and other current assets consisted of the following: As of June 30, 2022 December 31, 2021 Prepaid assets $ 126.2 $ 94.5 Prepaid income tax 137.6 128.6 Unbilled receivables 283.2 269.6 Value added tax and other consumption tax receivables 93.7 83.9 Other miscellaneous current assets 89.1 80.6 Prepaid and other current assets $ 729.8 $ 657.2

LEASES

LEASES	6 Months Ended
	Jun. 30, 2022
Leases [Abstract]
LEASES	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, 2022, the Company made no changes to the methods described in note 4 to its consolidated financial statements included in the 2021 Form 10-K. As of June 30, 2022, 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, 2022 were as follows: Fiscal Year Amount (1) Remainder of 2022 $ 3,333.2 2023 7,235.7 2024 6,963.5 2025 6,443.2 2026 5,858.5 Thereafter 30,175.5 Total $ 60,009.6 _______________ (1) Balances are translated at the applicable period-end exchange rate, which may impact comparability between periods. 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 2021 Form 10-K. There were no material impairments recorded related to these assets during the three and six months ended June 30, 2022 and 2021. 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, 2022, 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, 2022, other than leases acquired in connection with acquisitions, 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, 2022. Information about other lease-related balances is as follows: As of June 30, 2022 December 31, 2021 Operating leases: Right-of-use asset $ 9,159.2 $ 9,225.1 Current portion of lease liability $ 762.6 $ 712.6 Lease liability 7,862.0 8,041.8 Total operating lease liability $ 8,624.6 $ 8,754.4 The weighted-average remaining lease terms and incremental borrowing rates are as follows: As of June 30, 2022 December 31, 2021 Operating leases: Weighted-average remaining lease term (years) 12.5 13.0 Weighted-average incremental borrowing rate 5.1 % 5.1 % The following table sets forth the components of lease cost: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Operating lease cost $ 304.2 $ 268.4 $ 610.7 $ 519.7 Variable lease costs not included in lease liability (1) 96.3 85.1 197.7 154.4 ______________ (1) Includes property tax paid on behalf of the landlord. Supplemental cash flow information is as follows: Six Months Ended June 30, 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (636.2) $ (507.0) Non-cash items: New operating leases (1) $ 234.9 $ 1,443.3 Operating lease modifications and reassessments $ 105.9 $ 166.8 _______________ (1) Amount includes new operating leases and leases acquired in connection with acquisitions. For the six months ended June 30, 2021, includes $1.3 billion related to the Telxius Acquisition (as defined in note 14). As of June 30, 2022, the Company does not have material operating or financing leases that have not yet commenced. Maturities of operating lease liabilities as of June 30, 2022 were as follows: Fiscal Year Operating Lease (1) Remainder of 2022 $ 562.9 2023 1,087.5 2024 1,042.8 2025 983.3 2026 930.6 Thereafter 7,082.3 Total lease payments 11,689.4 Less amounts representing interest (3,064.8) Total lease liability 8,624.6 Less current portion of lease liability 762.6 Non-current lease liability $ 7,862.0 _______________ (1) Balances are translated at the applicable period-end exchange rate, which may impact comparability between periods.
LEASES	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, 2022, the Company made no changes to the methods described in note 4 to its consolidated financial statements included in the 2021 Form 10-K. As of June 30, 2022, 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, 2022 were as follows: Fiscal Year Amount (1) Remainder of 2022 $ 3,333.2 2023 7,235.7 2024 6,963.5 2025 6,443.2 2026 5,858.5 Thereafter 30,175.5 Total $ 60,009.6 _______________ (1) Balances are translated at the applicable period-end exchange rate, which may impact comparability between periods. 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 2021 Form 10-K. There were no material impairments recorded related to these assets during the three and six months ended June 30, 2022 and 2021. 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, 2022, 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, 2022, other than leases acquired in connection with acquisitions, 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, 2022. Information about other lease-related balances is as follows: As of June 30, 2022 December 31, 2021 Operating leases: Right-of-use asset $ 9,159.2 $ 9,225.1 Current portion of lease liability $ 762.6 $ 712.6 Lease liability 7,862.0 8,041.8 Total operating lease liability $ 8,624.6 $ 8,754.4 The weighted-average remaining lease terms and incremental borrowing rates are as follows: As of June 30, 2022 December 31, 2021 Operating leases: Weighted-average remaining lease term (years) 12.5 13.0 Weighted-average incremental borrowing rate 5.1 % 5.1 % The following table sets forth the components of lease cost: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Operating lease cost $ 304.2 $ 268.4 $ 610.7 $ 519.7 Variable lease costs not included in lease liability (1) 96.3 85.1 197.7 154.4 ______________ (1) Includes property tax paid on behalf of the landlord. Supplemental cash flow information is as follows: Six Months Ended June 30, 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (636.2) $ (507.0) Non-cash items: New operating leases (1) $ 234.9 $ 1,443.3 Operating lease modifications and reassessments $ 105.9 $ 166.8 _______________ (1) Amount includes new operating leases and leases acquired in connection with acquisitions. For the six months ended June 30, 2021, includes $1.3 billion related to the Telxius Acquisition (as defined in note 14). As of June 30, 2022, the Company does not have material operating or financing leases that have not yet commenced. Maturities of operating lease liabilities as of June 30, 2022 were as follows: Fiscal Year Operating Lease (1) Remainder of 2022 $ 562.9 2023 1,087.5 2024 1,042.8 2025 983.3 2026 930.6 Thereafter 7,082.3 Total lease payments 11,689.4 Less amounts representing interest (3,064.8) Total lease liability 8,624.6 Less current portion of lease liability 762.6 Non-current lease liability $ 7,862.0 _______________ (1) Balances are translated at the applicable period-end exchange rate, which may impact comparability between periods.
LEASES	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, 2022, the Company made no changes to the methods described in note 4 to its consolidated financial statements included in the 2021 Form 10-K. As of June 30, 2022, 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, 2022 were as follows: Fiscal Year Amount (1) Remainder of 2022 $ 3,333.2 2023 7,235.7 2024 6,963.5 2025 6,443.2 2026 5,858.5 Thereafter 30,175.5 Total $ 60,009.6 _______________ (1) Balances are translated at the applicable period-end exchange rate, which may impact comparability between periods. 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 2021 Form 10-K. There were no material impairments recorded related to these assets during the three and six months ended June 30, 2022 and 2021. 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, 2022, 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, 2022, other than leases acquired in connection with acquisitions, 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, 2022. Information about other lease-related balances is as follows: As of June 30, 2022 December 31, 2021 Operating leases: Right-of-use asset $ 9,159.2 $ 9,225.1 Current portion of lease liability $ 762.6 $ 712.6 Lease liability 7,862.0 8,041.8 Total operating lease liability $ 8,624.6 $ 8,754.4 The weighted-average remaining lease terms and incremental borrowing rates are as follows: As of June 30, 2022 December 31, 2021 Operating leases: Weighted-average remaining lease term (years) 12.5 13.0 Weighted-average incremental borrowing rate 5.1 % 5.1 % The following table sets forth the components of lease cost: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Operating lease cost $ 304.2 $ 268.4 $ 610.7 $ 519.7 Variable lease costs not included in lease liability (1) 96.3 85.1 197.7 154.4 ______________ (1) Includes property tax paid on behalf of the landlord. Supplemental cash flow information is as follows: Six Months Ended June 30, 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (636.2) $ (507.0) Non-cash items: New operating leases (1) $ 234.9 $ 1,443.3 Operating lease modifications and reassessments $ 105.9 $ 166.8 _______________ (1) Amount includes new operating leases and leases acquired in connection with acquisitions. For the six months ended June 30, 2021, includes $1.3 billion related to the Telxius Acquisition (as defined in note 14). As of June 30, 2022, the Company does not have material operating or financing leases that have not yet commenced. Maturities of operating lease liabilities as of June 30, 2022 were as follows: Fiscal Year Operating Lease (1) Remainder of 2022 $ 562.9 2023 1,087.5 2024 1,042.8 2025 983.3 2026 930.6 Thereafter 7,082.3 Total lease payments 11,689.4 Less amounts representing interest (3,064.8) Total lease liability 8,624.6 Less current portion of lease liability 762.6 Non-current lease liability $ 7,862.0 _______________ (1) Balances are translated at the applicable period-end exchange rate, which may impact comparability between periods.

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS	6 Months Ended
	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLE ASSETS	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 Asia-Pacific Africa Europe Latin America Data Centers Balance as of January 1, 2022 $ 4,648.4 $ 990.1 $ 612.2 $ 3,230.4 $ 888.6 $ 2,978.4 $ 2.0 $ 13,350.1 Adjustments (1) — — — 11.7 4.3 (60.3) — (44.3) Other (2) (7.4) — — — — — — (7.4) Effect of foreign currency translation (0.8) (58.3) (44.3) (254.3) 28.8 — — (328.9) Balance as of June 30, 2022 $ 4,640.2 $ 931.8 $ 567.9 $ 2,987.8 $ 921.7 $ 2,918.1 $ 2.0 $ 12,969.5 _______________ (1) Europe and Latin America consist of measurement period adjustments related to the Telxius Acquisition. Data Centers consists of measurement period adjustments related to the CoreSite Acquisition. (2) Other represents the goodwill associated with certain operations acquired in connection with the Company’s acquisition of InSite Wireless Group, LLC. These business operations were sold during the six months ended June 30, 2022. The Company’s other intangible assets subject to amortization consisted of the following: As of June 30, 2022 As of December 31, 2021 Estimated Useful Gross Accumulated Net Book Gross Accumulated Net Book Acquired network location intangibles (1) Up to 20 $ 6,172.4 $ (2,439.0) $ 3,733.4 $ 6,294.6 $ (2,305.1) $ 3,989.5 Acquired tenant-related intangibles Up to 20 19,572.1 (5,526.0) 14,046.1 20,030.5 (5,051.5) 14,979.0 Acquired licenses and other intangibles 2-20 1,735.2 (289.1) 1,446.1 1,807.9 (49.2) 1,758.7 Total other intangible assets $ 27,479.7 $ (8,254.1) $ 19,225.6 $ 28,133.0 $ (7,405.8) $ 20,727.2 _______________ (1) Acquired network location intangibles are amortized over the shorter of the term of the corresponding ground lease, taking into consideration lease renewal options and residual value, generally up to 20 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, 2022, the remaining weighted average amortization period of the Company’s intangible assets was 15 years. Amortization of intangible assets for the three and six months ended June 30, 2022 was $460.9 million and $919.5 million, respectively. Amortization of intangible assets for the three and six months ended June 30, 2021 was $274.8 million and $528.2 million, respectively. The increase in amortization expense is primarily due to intangible assets acquired since the beginning of the prior-year period, including as a result of the Telxius Acquisition and the CoreSite Acquisition. Based on current exchange rates, the Company expects to record amortization expense as follows over the remaining current year and the five subsequent years: Fiscal Year Amount Remainder of 2022 $ 893.5 2023 1,612.2 2024 1,383.4 2025 1,352.7 2026 1,317.5 2027 1,314.9

ACCRUED EXPENSES

ACCRUED EXPENSES	6 Months Ended
	Jun. 30, 2022
Accrued Liabilities, Current [Abstract]
ACCRUED EXPENSES	ACCRUED EXPENSES Accrued expenses consisted of the following: As of June 30, 2022 December 31, 2021 Accrued construction costs $ 129.2 $ 197.3 Accrued income tax payable 19.8 84.8 Accrued pass-through costs 137.9 91.0 Amounts payable for acquisitions 85.4 95.2 Amounts payable to tenants 87.2 81.1 Accrued property and real estate taxes 281.7 255.3 Accrued rent 79.0 78.8 Payroll and related withholdings 98.3 124.7 Other accrued expenses 343.7 404.6 Total accrued expenses $ 1,262.2 $ 1,412.8

LONG-TERM OBLIGATIONS

LONG-TERM OBLIGATIONS	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
LONG-TERM OBLIGATIONS	LONG-TERM OBLIGATIONS Outstanding amounts under the Company’s long-term obligations, reflecting discounts, premiums, debt issuance costs and fair value adjustments due to interest rate swaps consisted of the following: As of June 30, 2022 December 31, 2021 Maturity Date 2021 Multicurrency Credit Facility (1) (2) $ 4,545.5 $ 4,388.4 June 30, 2025 2021 Term Loan (1) 995.8 995.4 January 31, 2027 2021 Credit Facility (1) 2,065.0 1,410.0 January 31, 2027 2021 EUR Three Year Delayed Draw Term Loan (1) (2) 864.4 937.6 May 28, 2024 2021 USD 364-Day Delayed Draw Term Loan (1) 599.3 2,998.5 December 28, 2022 2021 USD Two Year Delayed Draw Term Loan (1) 1,498.8 1,498.4 December 28, 2023 2.250% senior notes (3) — 600.3 N/A 3.50% senior notes 998.9 997.9 January 31, 2023 3.000% senior notes 695.1 709.9 June 15, 2023 0.600% senior notes 498.4 497.9 January 15, 2024 5.00% senior notes 1,000.7 1,000.9 February 15, 2024 3.375% senior notes 647.6 647.0 May 15, 2024 2.950% senior notes 645.5 644.7 January 15, 2025 2.400% senior notes 746.7 746.1 March 15, 2025 1.375% senior notes (4) 520.3 563.8 April 4, 2025 4.000% senior notes 746.1 745.5 June 1, 2025 1.300% senior notes 496.8 496.4 September 15, 2025 4.400% senior notes 497.9 497.6 February 15, 2026 1.600% senior notes 695.7 695.2 April 15, 2026 1.950% senior notes (4) 520.6 564.3 May 22, 2026 1.450% senior notes 593.7 593.0 September 15, 2026 3.375% senior notes 992.0 991.2 October 15, 2026 3.125% senior notes 398.4 398.3 January 15, 2027 2.750% senior notes 745.6 745.2 January 15, 2027 0.450% senior notes (4) 781.0 847.1 January 15, 2027 0.400% senior notes (4) 518.7 562.5 February 15, 2027 3.650% senior notes 642.4 — March 15, 2027 3.55% senior notes 745.9 745.5 July 15, 2027 3.600% senior notes 694.7 694.3 January 15, 2028 0.500% senior notes (4) 779.2 845.3 January 15, 2028 1.500% senior notes 646.1 645.8 January 31, 2028 3.950% senior notes 592.1 591.6 March 15, 2029 0.875% senior notes (4) 780.9 847.3 May 21, 2029 3.800% senior notes 1,636.0 1,635.1 August 15, 2029 2.900% senior notes 743.0 742.5 January 15, 2030 2.100% senior notes 741.7 741.2 June 15, 2030 0.950% senior notes (4) 517.0 561.0 October 5, 2030 1.875% senior notes 791.9 791.4 October 15, 2030 2.700% senior notes 694.0 693.7 April 15, 2031 2.300% senior notes 691.4 691.0 September 15, 2031 1.000% senior notes (4) 674.3 731.7 January 15, 2032 4.050% senior notes 641.8 — March 15, 2032 1.250% senior notes (4) 517.1 561.2 May 21, 2033 3.700% senior notes 592.2 592.1 October 15, 2049 3.100% senior notes 1,038.1 1,038.0 June 15, 2050 2.950% senior notes 1,021.8 1,021.5 January 15, 2051 Total American Tower Corporation debt 38,490.1 39,943.3 Series 2013-2A securities (5) 1,298.9 1,298.2 March 15, 2023 Series 2018-1A securities (5) 495.7 495.3 March 15, 2028 Series 2015-2 notes (6) 523.1 522.7 June 16, 2025 CoreSite Debt (7) — 955.1 N/A Other subsidiary debt (8) 5.9 8.0 Various Total American Tower subsidiary debt 2,323.6 3,279.3 Finance lease obligations 30.3 31.6 Total 40,844.0 43,254.2 Less current portion of long-term obligations (3,603.9) (4,568.7) Long-term obligations $ 37,240.1 $ 38,685.5 _______________ (1) Accrues interest at a variable rate. (2) As of June 30, 2022 reflects borrowings denominated in Euro (“EUR”) and, for the 2021 Multicurrency Credit Facility (as defined below), reflects borrowings denominated in both EUR and U.S. Dollars (“USD”). (3) Repaid in full on January 14, 2022 using borrowings under the 2021 Credit Facility (as defined below). (4) Notes are denominated in EUR. (5) Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2048. (6) Maturity date reflects the anticipated repayment date; final legal maturity is June 15, 2050. (7) Debt entered into by CoreSite assumed in connection with the CoreSite Acquisition (the “CoreSite Debt”). On January 7, 2022, all amounts outstanding under the CoreSite Debt were repaid using borrowings under the 2021 Multicurrency Credit Facility and cash on hand. (8) Includes debt entered into by the Company’s Kenyan subsidiary in connection with an acquisition of communications sites in Kenya, which is denominated in USD and is payable either (i) in future installments subject to the satisfaction of specified conditions or (ii) five years from the note origination date, including the exercise of the optional two year extension, subject to the satisfaction of specified conditions. As of December 31, 2021, also included U.S. subsidiary debt related to a seller-financed acquisition. Current portion of long-term obligations— The Company’s current portion of long-term obligations primarily includes (i) $600.0 million in borrowings under the 2021 USD 364-Day Delayed Draw Term Loan (as defined below) due December 28, 2022, (ii) $1.3 billion aggregate principal amount of the Company’s Secured Tower Revenue Securities, Series 2013-2A due March 15, 2023, (iii) $1.0 billion aggregate principal amount of the Company’s 3.50% senior unsecured notes due January 31, 2023 and (iv) $700.0 million aggregate principal amount of the Company’s 3.000% senior unsecured notes due June 15, 2023. 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 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. Repayment of CoreSite Debt —On January 7, 2022, the Company repaid the entire amount outstanding under the CoreSite Debt, plus accrued and unpaid interest up to, but excluding, January 7, 2022, for an aggregate redemption price of $962.9 million, including $80.1 million of prepayment consideration and $7.8 million in accrued and unpaid interest. The repayment of the CoreSite Debt was funded with borrowings under the 2021 Multicurrency Credit Facility and cash on hand. Repayment of 2.250% Senior Notes —On January 14, 2022, the Company repaid $600.0 million aggregate principal amount of the Company’s 2.250% senior unsecured notes due January 15, 2022 (the “2.250% Notes”) upon their maturity. The 2.250% Notes were repaid using borrowings under the 2021 Credit Facility. Upon completion of the repayment, none of the 2.250% Notes remained outstanding. Offering of Senior Notes 3.650% Senior Notes and 4.050% Senior Notes Offering— On April 1, 2022, the Company completed a registered public offering of $650.0 million aggregate principal amount of 3.650% senior unsecured notes due 2027 (the “3.650% Notes”) and $650.0 million aggregate principal amount of 4.050% senior unsecured notes due 2032 (the “4.050% Notes” and, together with the 3.650% Notes, the “Notes”). The net proceeds from this offering were approximately $1,282.6 million, after deducting commissions and estimated expenses. The Company used the net proceeds to repay existing indebtedness under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility and the 2021 USD 364-Day Delayed Draw Term Loan. The key terms of the 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) 3.650% Notes $ 650.0 April 1, 2022 March 15, 2027 3.650% September 15, 2022 March 15 and September 15 February 15, 2027 4.050% Notes $ 650.0 April 1, 2022 March 15, 2032 4.050% September 15, 2022 March 15 and September 15 December 15, 2031 ___________ (1) Accrued and unpaid interest on USD denominated notes is payable in USD semi-annually in arrears and will be computed from the issue date on the basis of a 360-day year comprised of twelve 30-day months. (2) The Company may redeem the Notes at any time, in whole or in part, at a redemption price equal to 100% of the principal amount of the Notes plus a make-whole premium, together with accrued interest to the redemption date. If the Company redeems the Notes on or after the par call date, the Company will not be required to pay a make-whole premium. If the Company undergoes a change of control and corresponding ratings decline, each as defined in the supplemental indenture for the Notes, the Company may be required to repurchase all of the Notes at a purchase price equal to 101% of the principal amount of such Notes, plus accrued and unpaid interest (including additional interest, if any), up to but not including the repurchase date. The Notes rank equally with all of the Company’s other senior unsecured debt 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 2021 Multicurrency Credit Facility— During the six months ended June 30, 2022, the Company borrowed an aggregate of $850.0 million and repaid an aggregate of $600.0 million of revolving indebtedness under the Company’s $6.0 billion senior unsecured multicurrency revolving credit facility, as amended and restated in December 2021 (the “2021 Multicurrency Credit Facility”). The Company used the borrowings to repay outstanding indebtedness, including the CoreSite Debt, and for general corporate purposes. 2021 Credit Facility— During the six months ended June 30, 2022, the Company borrowed an aggregate of $2.1 billion and repaid an aggregate of $1.4 billion of revolving indebtedness under the Company’s $4.0 billion senior unsecured revolving credit facility, as amended and restated in December 2021 (the “2021 Credit Facility”). The Company used the borrowings to repay outstanding indebtedness, including the 2.250% Notes, and for general corporate purposes. Repayments under the 2021 USD 364-Day Delayed Draw Term Loan— On April 6, 2022, the Company repaid $100.0 million of indebtedness under the Company’s $3.0 billion unsecured term loan entered into in December 2021 (the “2021 USD 364-Day Delayed Draw Term Loan”) using proceeds from the issuance of the 3.650% Notes and the 4.050% Notes and cash on hand. On June 10, 2022, the Company repaid $2.3 billion of indebtedness under the 2021 USD 364-Day Delayed Draw Term Loan using proceeds from the June 2022 common stock offering (as further discussed in note 10) and cash on hand. As of June 30, 2022, the key terms under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the Company’s $1.0 billion unsecured term loan, as amended and restated in December 2021 (the “2021 Term Loan”), the Company’s 825.0 million EUR unsecured term loan, as amended and restated in December 2021 (the “2021 EUR Three Year Delayed Draw Term Loan”), the 2021 USD 364-Day Delayed Draw Term Loan and the Company’s $1.5 billion unsecured term loan entered into in December 2021 (the “2021 USD Two Year Delayed Draw Term Loan”) were as follows: Outstanding Principal Balance Undrawn letters of credit Maturity Date Current margin over LIBOR or EURIBOR (1) Current commitment fee (2) 2021 Multicurrency Credit Facility $ 4,545.5 $ 3.5 June 30, 2025 (3) 1.125 % 0.110 % 2021 Credit Facility 2,065.0 24.2 January 31, 2027 (3) 1.125 % 0.110 % 2021 Term Loan 1,000.0 N/A January 31, 2027 1.125 % N/A 2021 EUR Three Year Delayed Draw Term Loan 864.9 N/A May 28, 2024 1.125 % N/A 2021 USD 364-Day Delayed Draw Term Loan 600.0 N/A December 28, 2022 1.125 % N/A 2021 USD Two Year Delayed Draw Term Loan 1,500.0 N/A December 28, 2023 1.125 % N/A _______________ (1) LIBOR applies to the USD denominated borrowings under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the 2021 Term Loan, the 2021 USD 364-Day Delayed Draw Term Loan and the 2021 USD Two Year Delayed Draw Term Loan. Euro Interbank Offer Rate (“EURIBOR”) applies to the EUR denominated borrowings under the 2021 Multicurrency Credit Facility and all of the borrowings under the 2021 EUR Three Year Delayed Draw Term Loan. (2) Fee on undrawn portion of each credit facility.

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	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, 2022 December 31, 2021 Fair Value Measurements Using Fair Value Measurements Using Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets: Interest rate swap agreements — $ — — — $ 11.0 — Investments in equity securities (1) $ 29.3 — — $ 37.1 — — Liabilities: Interest rate swap agreements — $ 4.7 — — — — Fair value of debt related to interest rate swap agreements (2) $ (3.6) — — $ 12.2 — — _______________ (1) Investments in equity securities are recorded in Notes receivable and other non-current assets in the consolidated balance sheet 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 the three and six months ended June 30, 2022, the Company recognized unrealized losses of $17.3 million and $7.8 million, respectively, for equity securities held as of June 30, 2022. (2) Included in the carrying values of the corresponding debt obligations. During the six months ended June 30, 2022, the Company made no changes to the methods described in note 11 to its consolidated financial statements included in the 2021 Form 10-K that it used to measure the fair value of its interest rate swap agreements. In January 2022, the interest rate swap agreements with certain lenders under the 2.250% Notes expired upon maturity of the underlying debt. As of June 30, 2022, there were no amounts outstanding under the interest rate swap agreements under the 2.250% Notes. 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. There were no material impairments during the three and six months ended June 30, 2022 and 2021. There were no other items measured at fair value on a nonrecurring basis during the three and six months ended June 30, 2022 or 2021.

INCOME TAXES

INCOME TAXES	6 Months Ended
	Jun. 30, 2022
Income Tax Disclosure [Abstract]
INCOME TAXES	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 amounts 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. In addition, the Company is able to offset certain income by utilizing its net operating losses, subject to specified limitations. 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. The decreases in the income tax provision during the three and six months ended June 30, 2022 were primarily attributable to the reversal of valuation allowances of $42.5 million and $79.7 million, respectively, in certain jurisdictions. These valuation allowance reversals were recognized as a reduction to the income tax provision as the net related deferred tax assets were deemed realizable based on changes in facts and circumstances relevant to the assets’ recoverability. As of June 30, 2022 and December 31, 2021, the total unrecognized tax benefits that would impact the ETR, if recognized, were approximately $102.7 million and $94.8 million, respectively. The amount of unrecognized tax benefits during the three and six months ended June 30, 2022 includes (i) additions to the Company’s existing tax positions, including remeasurements of acquired liabilities, of $7.9 million and $9.6 million, respectively and (ii) reductions due to foreign currency exchange rate fluctuations of $4.9 million and $2.4 million, respectively. Unrecognized tax benefits are expected to change over the next 12 months if certain tax matters ultimately settle with the applicable taxing jurisdiction during this time frame, as described in note 12 to the Company’s consolidated financial statements included in the 2021 Form 10-K. The impact of the amount of these changes to previously recorded uncertain tax positions could range from zero to $20.7 million. The Company recorded the following penalties and income tax-related interest expense during the three and six months ended June 30, 2022 and 2021: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Penalties and income tax-related interest expense (1) $ 4.2 $ 29.8 $ 11.5 $ 33.5 _______________ (1) Three and six months ended June 30, 2021 reflect an increase of $16.6 million due to a reclassification of unrecognized tax benefits to penalties and income tax-related interest expense. As of June 30, 2022 and December 31, 2021, the total amount of accrued income tax related interest and penalties included in the consolidated balance sheets were $54.5 million and $42.3 million, respectively.

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION	6 Months Ended
	Jun. 30, 2022
Share-Based Payment Arrangement [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION Summary of Stock-Based Compensation Plans —The Company maintains equity incentive plans that provide for the grant of stock-based awards to its directors, officers and employees. The Company’s 2007 Equity Incentive Plan, as amended (the “2007 Plan”), provides for the grant of non-qualified and incentive stock options, as well as restricted stock units, restricted stock and other stock-based awards. 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, generally over four years for time-based restricted stock units (“RSUs”) and stock options and three years for performance-based restricted stock units (“PSUs”). Stock options generally expire ten years from the date of grant. As of June 30, 2022, the Company had the ability to grant stock-based awards with respect to an aggregate of 5.1 million shares of common stock under the 2007 Plan. In connection with the CoreSite Acquisition, the Company assumed the remaining shares previously available for issuance under a plan approved by the CoreSite shareholders, which converted into 1.4 million shares of the Company’s common stock. These shares will be available for issuance under the 2007 Plan, however, will only be available for grants to certain employees and will not be available for issuance beyond the period when they would have been available under the CoreSite plan, or March 20, 2023, at which time they will no longer be available for grant. 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 three and six months ended June 30, 2022 and 2021, 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, 2022 2021 2022 2021 Stock-based compensation expense $ 42.2 $ 31.9 $ 98.9 $ 69.9 Stock Options —As of June 30, 2022, there was no unrecognized compensation expense related to unvested stock options. The Company’s option activity for the six months ended June 30, 2022 was as follows (shares disclosed in full amounts): Number of Options Outstanding as of January 1, 2022 1,067,999 Exercised (143,456) Forfeited — Expired — Outstanding as of June 30, 2022 924,543 Restricted Stock Units— As of June 30, 2022, total unrecognized compensation expense related to unvested RSUs granted under the 2007 Plan, including the CoreSite Replacement Awards (as defined below), was $233.7 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). In December 2021, in connection with the CoreSite Acquisition, the Company assumed and converted certain equity awards previously granted by CoreSite under its equity plan into corresponding equity awards with respect to shares of the Company’s common stock (the “CoreSite Replacement Awards”). As of June 30, 2022, total unrecognized compensation expense related to the CoreSite Replacement Awards was $13.0 million and is expected to be recognized over a weighted average period of approximately one year . Performance-Based Restricted Stock Units— During the six months ended June 30, 2022, the Company’s Compensation Committee (the “Compensation Committee”) granted an aggregate of 98,542 PSUs (the “2022 PSUs”) to its executive officers and established the performance metrics for these awards. During the years ended December 31, 2021 and 2020, the Compensation Committee granted an aggregate of 98,694 PSUs (the “2021 PSUs”) and 110,925 PSUs (the “2020 PSUs”), respectively, to its executive officers and established the performance metrics for these awards. During the year ended December 31, 2020, in connection with the retirement of the Company’s former Chief Executive Officer, an aggregate of 40,186 shares underlying the 2020 PSUs were forfeited, which included the target number of shares issuable at the end of the three-year performance period for such executive’s 2020 PSUs. Threshold, target and maximum parameters were established for the metrics for a three-year performance period with respect to each of the 2022 PSUs, the 2021 PSUs and the 2020 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 performance 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. Restricted Stock Units and Performance-Based Restricted Stock Units —The Company’s RSU and PSU activity for the six months ended June 30, 2022 was as follows (shares disclosed in full amounts): RSUs PSUs Outstanding as of January 1, 2022 (1) (2) 1,298,178 267,621 Granted (3) 702,278 98,542 Vested and Released (4) (533,157) (98,188) Forfeited (43,181) — Outstanding as of June 30, 2022 1,424,118 267,975 _______________ (1) RSUs include 125,841 shares of the CoreSite Replacement Awards. (2) PSUs consist of the target number of shares issuable at the end of the three-year performance period for the outstanding 2021 PSUs and the outstanding 2020 PSUs, or 98,694 shares and 70,739 shares, respectively, and the shares issuable at the end of the three-year performance period for the PSUs granted in 2019 (the “2019 PSUs”) based on achievement against the performance metrics for the three-year performance period, or 98,188 shares. (3) PSUs consist of the target number of shares issuable at the end of the three-year performance period for the 2022 PSUs, or 98,542 shares. (4) Includes 17,121 shares of previously vested and deferred RSUs. PSUs consist of shares vested pursuant to the 2019 PSUs. There are no additional shares to be earned related to the 2019 PSUs.

EQUITY

EQUITY	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
EQUITY	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, 2022, the Company received an aggregate of $19.8 million in proceeds upon exercises of stock options and sales pursuant to the ESPP. 2020 “At the Market” Stock Offering Program —In August 2020, the Company established an “at the market” stock offering program through which it may issue and sell shares of its common stock having an aggregate gross sales price of up to $1.0 billion (the “2020 ATM Program”). Sales under the 2020 ATM Program may be made by means of ordinary brokers’ transactions on the New York Stock Exchange or otherwise at market prices prevailing at the time of sale, at prices related to prevailing market prices or, subject to specific instructions of the Company, at negotiated prices. The Company intends to use the net proceeds from any issuances under the 2020 ATM Program for general corporate purposes, which may include, among other things, the funding of acquisitions, additions to working capital and repayment or refinancing of existing indebtedness. As of June 30, 2022, the Company has not sold any shares of common stock under the 2020 ATM Program. Common Stock Offering —On June 7, 2022, the Company completed a registered public offering of 9,185,000 shares of its common stock, par value $0.01 per share, (which includes the full exercise of the underwriters’ over-allotment option) at $256.00 per share. Aggregate net proceeds from this offering were approximately $2.3 billion after deducting underwriting discounts and estimated offering expenses. The Company used the net proceeds to repay existing indebtedness under the 2021 USD 364-Day Delayed Draw Term Loan. Stock Repurchase Programs —In March 2011, the Company’s Board of Directors approved a stock repurchase program, pursuant to which the Company is authorized to repurchase up to $1.5 billion of its common stock (the “2011 Buyback”). In December 2017, the Board of Directors approved an additional stock repurchase program, pursuant to which the Company is authorized to repurchase up to $2.0 billion of its common stock (the “2017 Buyback,” and, together with the 2011 Buyback, the “Buyback Programs”). Under the Buyback Programs, 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, in accordance with securities laws and other legal requirements and subject to market conditions and other factors. During the six months ended June 30, 2022, there were no repurchases under either of the Buyback Programs. As of June 30, 2022, the Company has repurchased a total of 14,361,283 shares of its common stock under the 2011 Buyback for an aggregate of $1.5 billion, including commissions and fees. As of June 30, 2022, the Company has not made any repurchases under the 2017 Buyback. 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 Programs are subject to, among other things, the Company having available cash to fund the repurchases. Distributions —During the six months ended June 30, 2022, 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 18, 2022 July 8, 2022 June 17, 2022 $ 1.43 $ 665.8 March 10, 2022 April 29, 2022 April 13, 2022 $ 1.40 $ 638.8 December 15, 2021 January 14, 2022 December 27, 2021 $ 1.39 $ 633.5 _______________ (1) Does not include amounts accrued for distributions payable related to unvested restricted stock units. During the six months ended June 30, 2021, 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 27, 2021 July 9, 2021 June 18, 2021 $ 1.27 $ 577.8 March 4, 2021 April 29, 2021 April 13, 2021 $ 1.24 $ 551.5 December 3, 2020 February 2, 2021 December 28, 2020 $ 1.21 $ 537.6 _______________ (1) Does not include amounts accrued for distributions payable related to unvested restricted stock units.

NONCONTROLLING INTEREST

NONCONTROLLING INTEREST	6 Months Ended
	Jun. 30, 2022
Noncontrolling Interest [Abstract]
NONCONTROLLING INTERESTS	NONCONTROLLING INTERESTS Dividend to noncontrolling interest— Certain of the Company’s subsidiaries may, from time to time, declare dividends. In December 2021 , AT Iberia C.V. declared a dividend of 14.0 million EUR (approximately $15.9 million) payable pursuant to the terms of the ownership agreements to ATC Europe and PGGM in proportion to their respective equity interests in AT Iberia C.V. Purchase of Interests— In March 2021, the Company purchased the remaining minority interests held in a subsidiary in the United States for total consideration of $6.0 million. The purchase price was settled with unregistered shares of the Company’s common stock, in lieu of cash. The Company now owns 100% of the subsidiary as a result of the purchase. Reorganization of European Interests— In June 2021 , in connection with the funding of the Telxius Acquisition, the Company completed a reorganization of its subsidiaries in Europe. As part of the reorganization, PGGM converted its previously held 49% noncontrolling interest in Former ATC Europe into noncontrolling interests in new subsidiaries, consisting of the Company's operations in Germany and Spain, inclusive of the assets acquired pursuant to the Telxius Acquisition. The reorganization included cash consideration paid to PGGM of 178.0 million EUR (approximately $214.9 million). The reorganization is reflected in the consolidated statements of equity as (i) a reduction in Additional Paid-in Capital of $648.4 million and (ii) an increase in Noncontrolling Interests of $601.0 million, and in the consolidated statements of comprehensive income (loss) as an increase in Comprehensive income attributable to American Tower Corporation stockholders of $47.4 million. CDPQ and Allianz Partnerships —In May and June 2021, the Company entered into agreements with Caisse de dépôt et placement du Québec (“CDPQ”) and Allianz insurance companies and funds managed by Allianz Capital Partners GmbH, including the Allianz European Infrastructure Fund (collectively, “Allianz”), for CDPQ and Allianz to acquire 30% and 18% noncontrolling interests, respectively, in ATC Europe (the “ATC Europe Transactions”). The Company completed the ATC Europe Transactions in September 2021 for total aggregate consideration of 2.6 billion EUR (approximately $3.1 billion at the date of closing). After the completion of the ATC Europe Transactions, the Company holds a 52% controlling ownership interest in ATC Europe. As of June 30, 2022, ATC Europe consists of the Company’s operations in France, Germany, Poland and Spain. The Company currently holds a 52% controlling interest in ATC Europe, with CDPQ and 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 Poland 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 August 2021 , the Company acquired a 51% controlling interest in Kirtonkhola Tower Bangladesh Limited (“KTBL”) for 900 million Bangladeshi Taka (“BDT”) (approximately $10.6 million at the date of closing). Confidence Group holds a 49% noncontrolling interest in KTBL. The changes in noncontrolling interests were as follows: Six Months Ended June 30, 2022 2021 Balance as of January 1, $ 3,988.4 $ 474.9 Adjustment to noncontrolling interest due to reorganization (1) — 601.0 Redemption of noncontrolling interest (2) — (1.7) Net (loss) income attributable to noncontrolling interests (16.3) 5.4 Foreign currency translation adjustment attributable to noncontrolling interests, net of tax (252.7) (10.1) Contributions from noncontrolling interest holders 48.4 — Distributions to noncontrolling interest holders (0.3) (0.3) Balance as of June 30, $ 3,767.5 $ 1,069.2 _______________ (1) Represents the impact of the reorganization of European interests described above on Noncontrolling interests.

EARNINGS PER COMMON SHARE

EARNINGS PER COMMON SHARE	6 Months Ended
	Jun. 30, 2022
Earnings Per Share [Abstract]
EARNINGS PER COMMON SHARE	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, 2022 2021 2022 2021 Net income attributable to American Tower Corporation common stockholders $ 898.2 $ 746.3 $ 1,609.9 $ 1,391.3 Basic weighted average common shares outstanding 458,776 450,617 457,369 447,569 Dilutive securities 1,043 1,737 1,195 1,821 Diluted weighted average common shares outstanding 459,819 452,354 458,564 449,390 Basic net income attributable to American Tower Corporation common stockholders per common share $ 1.96 $ 1.66 $ 3.52 $ 3.11 Diluted net income attributable to American Tower Corporation common stockholders per common share $ 1.95 $ 1.65 $ 3.51 $ 3.10 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, 2022 2021 2022 2021 Restricted stock units 89 3 114 1

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	6 Months Ended
	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Litigation —The Company periodically becomes involved in various claims, lawsuits and proceedings that are incidental to its business. In the opinion of Company management, after consultation with counsel, there are no matters currently pending that would, in the event of an adverse outcome, materially impact the Company’s consolidated financial position, results of operations or liquidity. 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 11,250 wireless communications sites commencing March 27, 2015. The average term of the lease or sublease for all 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 will occupy the sites as a tenant for an initial term of ten years with eight optional successive five-year terms; 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 2,000 towers commencing between December 2000 and August 2004. Substantially all of the towers are part of the securitization transactions completed in March 2013 and March 2018. The average term of the lease or sublease for all communications 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, 2022, the Company has purchased an aggregate of approximately 400 of the subleased towers which are subject to the applicable agreement. 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 all such sites, AT&T has the right to continue to lease the reserved space through June 30, 2025 at the then-current monthly fee, which shall escalate in accordance with the standard master lease agreement for the remainder of AT&T’s tenancy. Thereafter, AT&T shall have the right to renew such 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. On December 5, 2016, the Company received an income tax assessment of Essar Telecom Infrastructure Private Limited (“ETIPL”) from the India Income Tax Department (the “Tax Department”) for the fiscal year ending 2008 in the amount of INR 4.75 billion ($69.8 million on the date of assessment) related to capital contributions. The Company challenged the assessment before the Office of Commissioner of Income Tax - Appeals, which ruled in the Company’s favor in January 2018. However, the Tax Department has appealed this ruling at a higher appellate authority. The Company estimates that there is a more likely than not probability that the Company’s position will be sustained upon appeal. Accordingly, no liability has been recorded. Additionally, the assessment was made with respect to transactions that took place in the tax year commencing in 2007, prior to the Company’s acquisition of ETIPL. Under the Company’s definitive acquisition agreement with ETIPL, the seller is obligated to indemnify and defend the Company with respect to any tax-related liability that may arise from activities prior to March 31, 2010.

ACQUISITIONS

ACQUISITIONS	6 Months Ended
	Jun. 30, 2022
Business Combination and Asset Acquisition [Abstract]
ACQUISITIONS	ACQUISITIONS Impact of current year acquisitions —The Company typically acquires communications sites and other communications infrastructure assets from wireless carriers or other tower operators and subsequently integrates those sites and related assets into its existing portfolio of communications sites and related assets. In the United States, the Company has also acquired data center facilities and related assets, including through the CoreSite Acquisition, as discussed below. The financial results of the Company’s acquisitions have been included in the Company’s consolidated statements of operations for the six months ended June 30, 2022 from the date of the respective acquisition. The date of acquisition, and by extension the point at which the Company begins to recognize the results of an acquisition, may depend on, among other things, the receipt of contractual consents, the commencement and extent of leasing arrangements and the timing of the transfer of title or rights to the assets, which may be accomplished in phases. Communications sites acquired from communications service providers may never have been operated as a business and may instead have been utilized solely by the seller as a component of its network infrastructure. An acquisition may or may not involve the transfer of business operations or employees. The Company evaluates each of its acquisitions under the accounting guidance framework to determine whether to treat an acquisition as an asset acquisition or a business combination. For those transactions treated as asset acquisitions, the purchase price is allocated to the assets acquired, with no recognition of goodwill. For those acquisitions accounted for as business combinations, the Company recognizes acquisition and merger related expenses in the period in which they are incurred and services are received; for transactions accounted for as asset acquisitions, these costs are capitalized as part of the purchase price. Acquisition and merger related costs may include finder’s fees, advisory, legal, accounting, valuation and other professional or consulting fees and general administrative costs directly related to completing the transaction. Integration costs include incremental and non-recurring costs necessary to convert data and systems, retain employees and otherwise enable the Company to operate acquired businesses or assets efficiently. The Company records acquisition and merger related expenses for business combinations, as well as integration costs for all acquisitions, in Other operating expenses in the consolidated statements of operations. During the three and six months ended June 30, 2022 and 2021, the Company recorded acquisition and merger related expenses for business combinations and non-capitalized asset acquisition costs and integration costs as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Acquisition and merger related expenses $ 3.5 $ 28.9 $ 9.2 $ 63.5 Integration costs $ 14.8 $ 9.4 $ 24.8 $ 26.0 During the six months ended June 30, 2022 and 2021, the Company also recorded benefits of $4.3 million and $4.4 million, respectively, related to pre-acquisition contingencies and settlements. The three and six months ended June 30, 2021 included acquisition and merger related costs associated with the Telxius Acquisition. 2022 Transactions The estimated aggregate impact of the acquisitions completed in 2022 on the Company’s revenues and gross margin for the three and six months ended June 30, 2022 was not material to the Company’s operating results. The revenues and gross margin amounts also reflect incremental revenues from the addition of new customers to communications infrastructure assets subsequent to the transaction date. Spain Fiber Acquisition —During the three months ended June 30, 2022, the Company acquired fiber connected to the Company’s communications sites in Spain from Telefónica de España S.A.U. for an aggregate total purchase price of 120.1 million EUR (approximately $128.8 million at the dates of closing), including value added tax. Of the aggregate purchase price, 73.2 million EUR (approximately $76.8 million) is reflected as a payable in the consolidated balance sheet as of June 30, 2022. This acquisition is being accounted for as an asset acquisition and is included in the table below in “Other.” Other Acquisitions —During the six months ended June 30, 2022, the Company acquired a total of 144 communications sites, as well as other communications infrastructure assets, in the United States, Canada, France, Mexico, Nigeria and Poland, including 96 communications sites in connection with the Company’s agreement with Orange S.A. (“Orange”), as further described below, for an aggregate purchase price of $85.4 million. Of the aggregate purchase price, $3.3 million is reflected as a payable in the consolidated balance sheet as of June 30, 2022. These acquisitions were accounted for as asset acquisitions. The following table summarizes the allocations of the purchase prices for the fiscal year 2022 acquisitions based upon their estimated fair value at the date of acquisition: Other Current assets $ 27.0 Property and equipment 54.6 Intangible assets (1): Tenant-related intangible assets 122.4 Network location intangible assets 14.1 Other intangible assets — Other non-current assets 16.3 Current liabilities (0.6) Deferred tax liability — Other non-current liabilities (19.6) Net assets acquired 214.2 Goodwill — Fair value of net assets acquired 214.2 Purchase price $ 214.2 _______________ (1) Tenant-related intangible assets and network location intangible assets are amortized on a straight-line basis generally over a 20 year period. Other Signed Acquisitions Orange Acquisition —On November 28, 2019, the Company entered into definitive agreements with Orange for the acquisition of up to approximately 2,000 communications sites in France over a period of up to five years for total consideration in the range of approximately 500.0 million EUR to 600.0 million EUR (approximately $550.5 million to $660.5 million at the date of signing) to be paid over the five-year term. In addition to the 96 communications sites acquired during the three months ended June 30, 2022, the Company acquired 1,197 of these communications sites during the years ended December 31, 2020 and 2021. Subsequent to June 30, 2022, the Company completed the acquisition of an additional 84 of these communications sites. The remaining communications sites are expected to continue to close in tranches, subject to customary closing conditions. 2021 Transactions Telxius Acquisition —On January 13, 2021, the Company entered into two agreements with Telxius Telecom, S.A. (“Telxius”), a subsidiary of Telefónica, S.A., pursuant to which the Company agreed to acquire Telxius’ European and Latin American tower divisions, comprising approximately 31,000 communications sites in Argentina, Brazil, Chile, Germany, Peru and Spain, for approximately 7.7 billion EUR (approximately $9.4 billion at the date of signing) (the “Telxius Acquisition”), subject to certain adjustments. In June 2021, the Company completed the acquisition of nearly 20,000 communications sites in Germany and Spain, for total consideration of approximately 6.3 billion EUR (approximately $7.7 billion at the date of closing), subject to certain post-closing adjustments and over 7,000 communications sites in Brazil, Peru, Chile and Argentina, for total consideration of approximately 0.9 billion EUR (approximately $1.1 billion at the date of closing), subject to certain post-closing adjustments. On August 2, 2021, the Company completed the acquisition of the approximately 4,000 remaining communications sites in Germany pursuant to the Telxius Acquisition for 0.6 billion EUR (approximately $0.7 billion at the date of closing). Of the aggregate purchase price, 247.7 million EUR (approximately $259.7 million), including post-closing adjustments, of deferred payments are due in September 2025 and are reflected in Other non-current liabilities in the consolidated balance sheet as of June 30, 2022. The acquired operations in Germany and Spain are included in the Europe property segment and the acquired operations in Brazil, Peru, Chile and Argentina are included in the Latin America property segment. The Telxius Acquisition was accounted for as a business combination. The following table summarizes the preliminary and updated allocations of the purchase price paid and the amounts of assets acquired and liabilities assumed for the Telxius Acquisition based upon its estimated fair value at the date of acquisition. Balances are reflected in the accompanying consolidated balance sheet as of June 30, 2022. Preliminary Allocation (1) Updated Allocation Current assets $ 289.0 $ 284.1 Property and equipment 1,417.7 1,323.6 Intangible assets (2): Tenant-related intangible assets 5,391.2 5,381.8 Network location intangible assets 675.8 674.5 Other intangible assets — — Other non-current assets 1,380.3 1,454.3 Current liabilities (331.9) (345.2) Deferred tax liability (1,227.5) (1,191.7) Other non-current liabilities (1,504.8) (1,522.1) Net assets acquired 6,089.8 6,059.3 Goodwill 3,500.0 3,533.0 Fair value of net assets acquired 9,589.8 9,592.3 Purchase price $ 9,589.8 $ 9,592.3 _______________ (1) Balances reflect the preliminary allocation as of September 30, 2021 following the August 2, 2021 closing of the second tranche of the Telxius Acquisition in Germany. (2) Tenant-related intangible assets and network location intangible assets are amortized on a straight-line basis generally over a 20 year period. CoreSite Acquisition —On November 14, 2021, the Company entered into an agreement with CoreSite to acquire all issued and outstanding shares of CoreSite common stock at $170.00 per share. CoreSite’s portfolio consisted of 24 data center facilities and related assets in eight United States markets. On December 28, 2021, the Company completed the CoreSite Acquisition for total consideration of approximately $10.4 billion, including the assumption and repayment of CoreSite’s existing debt. The acquired assets and operations are included in the Data Centers segment. The CoreSite Acquisition was accounted for as a business combination and is subject to post-closing adjustments. The full reconciliation and finalization of the assets acquired and liabilities assumed, including those subject to valuation, have not been completed and, as a result, there may be additional post-closing adjustments. The following table summarizes the preliminary and updated allocation of the purchase price paid and the amounts of assets acquired and liabilities assumed for the CoreSite Acquisition based upon its estimated fair value at the date of acquisition. Balances are reflected in the accompanying consolidated balance sheet as of June 30, 2022. Preliminary Allocation Updated Allocation Current assets $ 99.8 $ 99.6 Property and equipment 5,129.0 5,289.5 Intangible assets (1): Tenant-related intangible assets 665.0 655.0 Network location intangible assets — — Other intangible assets 1,709.0 1,636.3 Other non-current assets 332.9 330.1 Current liabilities (156.6) (153.6) Deferred tax liability — — Other non-current liabilities (323.1) (340.6) Net assets acquired 7,456.0 $ 7,516.3 Goodwill 2,943.3 2,883.0 Fair value of net assets acquired 10,399.3 10,399.3 Debt assumed (955.1) (955.1) Purchase price $ 9,444.2 $ 9,444.2 _______________ (1) Tenant-related intangible assets are amortized on a straight-line basis generally over a 20 year period. Other intangible assets are amortized on a straight-line basis generally over periods ranging from approximately 2 years to 10 years. Pro Forma Consolidated Results (Unaudited) The following table presents the unaudited pro forma financial results as if the 2022 acquisitions had occurred on January 1, 2021 and the 2021 acquisitions had occurred on January 1, 2020. The pro forma results, to the extent available, are based on historical information, and accordingly may not fully reflect the current operations of the acquired business. In addition, the pro forma results do not include any anticipated cost synergies, costs or other integration impacts. Accordingly, such pro forma amounts are not necessarily indicative of the results that actually would have occurred had the transactions been completed on the dates indicated, nor are they indicative of the future operating results of the Company. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Pro forma revenues $ 2,675.5 $ 2,604.9 $ 5,338.3 $ 5,109.1 Pro forma net income attributable to American Tower Corporation common stockholders $ 898.4 $ 659.4 $ 1,610.1 $ 1,209.6 Pro forma net income per common share amounts: Basic net income attributable to American Tower Corporation common stockholders $ 1.93 $ 1.42 $ 3.46 $ 2.61 Diluted net income attributable to American Tower Corporation common stockholders $ 1.93 $ 1.42 $ 3.45 $ 2.60

BUSINESS SEGMENTS

BUSINESS SEGMENTS	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
BUSINESS SEGMENTS	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. This business is referred to as the Company’s property operations. Data Centers —During the fourth quarter of 2021, as a result of the CoreSite Acquisition, the Company established the Data Centers segment as a reportable segment. The 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 services from, and requires different resources, skill sets and marketing strategies than, the existing property operating segment in the U.S. & Canada. Prior to this revision, the Company operated in five property business segments: (i) U.S. & Canada property, (ii) Asia-Pacific property, (iii) Africa property, (iv) Europe property and (v) Latin America property. The change in reportable segments had no impact on the Company’s consolidated financial statements for any prior periods. Historical financial information included in this Quarterly Report has been adjusted to reflect the change in reportable segments. As of June 30, 2022, the Company’s property operations consisted of the following: • U.S. & Canada: property operations in Canada and the United States; • Asia-Pacific: property operations in Australia, Bangladesh, India and the Philippines; • Africa: property operations in Burkina Faso, Ghana, Kenya, Niger, Nigeria, South Africa and Uganda; • Europe: property operations in France, Germany, Poland 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 and structural analysis, which primarily support its communications 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 to the Company’s consolidated financial statements included in the 2021 Form 10-K and as updated in note 1 above. 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. 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, 2022 and 2021 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 Services Other Total Three Months Ended June 30, 2022 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers Segment revenues $ 1,235.9 $ 298.0 $ 285.5 $ 178.8 $ 425.2 $ 191.1 $ 2,614.5 $ 59.8 $ 2,674.3 Segment operating expenses 212.6 181.7 111.9 75.3 133.5 79.0 794.0 28.9 822.9 Segment gross margin 1,023.3 116.3 173.6 103.5 291.7 112.1 1,820.5 30.9 1,851.4 Segment selling, general, administrative and development expense (1) 43.5 6.1 22.0 14.1 25.9 15.5 127.1 5.1 132.2 Segment operating profit $ 979.8 $ 110.2 $ 151.6 $ 89.4 $ 265.8 $ 96.6 $ 1,693.4 $ 25.8 $ 1,719.2 Stock-based compensation expense $ 42.2 42.2 Other selling, general, administrative and development expense 48.5 48.5 Depreciation, amortization and accretion 826.5 826.5 Other income (2) (96.3) (96.3) Income from continuing operations before income taxes $ 898.3 Total assets $ 26,882.2 $ 4,972.0 $ 4,752.8 $ 11,259.4 $ 8,736.9 $ 10,890.6 $ 67,493.9 $ 84.7 $ 538.2 $ 68,116.8 _______________ (1) Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $42.2 million. (2) Primarily includes gains from foreign currency exchange rate fluctuations, partially offset by interest expense. Property Total Services Other Total Three Months Ended June 30, 2021 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers Segment revenues $ 1,230.9 $ 298.2 $ 248.0 $ 87.8 $ 365.6 $ 2.5 $ 2,233.0 $ 65.9 $ 2,298.9 Segment operating expenses 210.8 183.8 85.7 29.9 112.1 1.0 623.3 24.6 647.9 Segment gross margin 1,020.1 114.4 162.3 57.9 253.5 1.5 1,609.7 41.3 1,651.0 Segment selling, general, administrative and development expense (1) 41.1 24.1 17.5 7.9 30.0 1.3 121.9 4.1 126.0 Segment operating profit $ 979.0 $ 90.3 $ 144.8 $ 50.0 $ 223.5 $ 0.2 $ 1,487.8 $ 37.2 $ 1,525.0 Stock-based compensation expense $ 31.9 31.9 Other selling, general, administrative and development expense 49.3 49.3 Depreciation, amortization and accretion 554.8 554.8 Other expense (2) 68.3 68.3 Income from continuing operations before income taxes $ 820.7 Total assets $ 27,315.6 $ 5,140.8 $ 5,031.5 $ 11,566.7 $ 9,240.0 $ 94.3 $ 58,388.9 $ 88.5 $ 505.5 $ 58,982.9 _______________ (1) Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $31.9 million. (2) Primarily includes interest expense, partially offset by gains from foreign currency exchange rate fluctuations. Property Total Services Other Total Six Months Ended June 30, 2022 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers Segment revenues $ 2,468.3 $ 596.5 $ 553.3 $ 377.3 $ 844.5 $ 375.4 $ 5,215.3 $ 119.3 $ 5,334.6 Segment operating expenses 412.4 356.8 209.6 167.6 263.5 155.6 1,565.5 56.8 1,622.3 Segment gross margin 2,055.9 239.7 343.7 209.7 581.0 219.8 3,649.8 62.5 3,712.3 Segment selling, general, administrative and development expense (1) 86.3 54.0 44.5 29.0 54.7 31.9 300.4 11.1 311.5 Segment operating profit $ 1,969.6 $ 185.7 $ 299.2 $ 180.7 $ 526.3 $ 187.9 $ 3,349.4 $ 51.4 $ 3,400.8 Stock-based compensation expense $ 98.9 98.9 Other selling, general, administrative and development expense 106.4 106.4 Depreciation, amortization and accretion 1,642.3 1,642.3 Other income (2) (70.3) (70.3) Income from continuing operations before income taxes $ 1,623.5 _______________ (1) Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $98.9 million. (2) Primarily includes gains from foreign currency exchange rate fluctuations, partially offset by interest expense. Property Total Services Other Total Six Months Ended June 30, 2021 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers Segment revenues $ 2,459.7 $ 579.6 $ 483.7 $ 132.4 $ 702.3 $ 5.0 $ 4,362.7 $ 94.7 $ 4,457.4 Segment operating expenses 407.8 359.3 166.6 37.7 213.3 1.9 1,186.6 35.6 1,222.2 Segment gross margin 2,051.9 220.3 317.1 94.7 489.0 3.1 3,176.1 59.1 3,235.2 Segment selling, general, administrative and development expense (1) 79.4 31.2 36.4 13.5 53.3 2.3 216.1 8.3 224.4 Segment operating profit $ 1,972.5 $ 189.1 $ 280.7 $ 81.2 $ 435.7 $ 0.8 $ 2,960.0 $ 50.8 $ 3,010.8 Stock-based compensation expense $ 69.9 69.9 Other selling, general, administrative and development expense 95.5 95.5 Depreciation, amortization and accretion 1,077.3 1,077.3 Other expense (2) 244.8 244.8 Income from continuing operations before income taxes $ 1,523.3 _______________ (1) Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $69.9 million. (2) Primarily includes interest expense, partially offset by gains from foreign currency exchange rate fluctuations.

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	6 Months Ended
	Jun. 30, 2022
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS Stonepeak Partnership —In July 2022, the Company entered into an agreement pursuant to which Stonepeak Partners LP (“Stonepeak”), on behalf of certain affiliated investment vehicles, will acquire a noncontrolling ownership interest in the Company’s U.S. data center business for total aggregate consideration of $2.5 billion, through an investment in common equity and mandatorily convertible preferred equity. The Company expects the transaction to close in the third quarter of 2022, subject to customary closing conditions. Upon closing of the transaction, the Company will hold a common equity interest of approximately 77% in its U.S. data center business, with Stonepeak holding approximately 23% of outstanding common equity and 100% of outstanding mandatorily convertible preferred equity. On a fully converted basis, which is expected to occur four years from the date of closing, and on the basis of the currently outstanding equity, the Company will hold a controlling ownership interest of approximately 71%, with Stonepeak holding approximately 29%.

BASIS OF PRESENTATION AND SIG_2

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)	6 Months Ended
	Jun. 30, 2022
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.
Reportable Segments	Change in Reportable Segments —During the fourth quarter of 2021, as a result of the Company’s acquisition of CoreSite Realty Corporation (“CoreSite,” and the acquisition, the “CoreSite Acquisition”), the Company updated its reportable segments to add a Data Centers segment. The Data Centers segment is within the Company’s property operations. The Company now reports its results in seven segments – U.S. & Canada property, Asia-Pacific property, Africa property, Europe property, Latin America property, Data Centers and Services, which are discussed further in note 15. The change in reportable segments had no impact on the Company’s consolidated financial statements for any prior periods. Historical financial information included in this Quarterly Report on Form 10-Q (this “Quarterly Report”) has been adjusted to reflect the change in reportable segments.
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 and 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, 2022.
Accounting Standards Updates	Accounting Standards UpdatesIn March 2020, the Financial Accounting Standards Board (the “FASB”) issued guidance to provide optional expedients and exceptions for applying accounting principles generally accepted in the United States to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The guidance applies only to contracts, hedging relationships and other transactions that reference the London Interbank Offered Rate (“LIBOR”) or another reference rate expected to be discontinued because of reference rate reform. The expedients and exceptions provided by the guidance do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022 for which an entity has elected certain optional expedients that are retained through the end of the hedging relationship. In January 2021, the FASB issued additional guidance that clarifies that certain practical expedients and exceptions for contract modifications and hedge accounting apply to derivatives that are affected by reference rate reform.

BASIS OF PRESENTATION AND SIG_3

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Tables)	6 Months Ended
	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Cash, 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, 2022 2021 Cash and cash equivalents $ 2,066.7 $ 1,928.0 Restricted cash 136.4 72.8 Total cash, cash equivalents and restricted cash $ 2,203.1 $ 2,000.8
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, 2022 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers (1) Total Non-lease property revenue $ 73.8 $ 4.9 $ 7.1 $ 6.8 $ 38.6 $ 26.0 $ 157.2 Services revenue 59.8 — — — — — 59.8 Total non-lease revenue $ 133.6 $ 4.9 $ 7.1 $ 6.8 $ 38.6 $ 26.0 $ 217.0 Property lease revenue 1,162.1 293.1 278.4 172.0 386.6 165.1 2,457.3 Total revenue $ 1,295.7 $ 298.0 $ 285.5 $ 178.8 $ 425.2 $ 191.1 $ 2,674.3 Three Months Ended June 30, 2021 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers (1) Total Non-lease property revenue $ 70.1 $ 1.7 $ 6.3 $ 1.7 $ 33.9 $ — $ 113.7 Services revenue 65.9 — — — — — 65.9 Total non-lease revenue $ 136.0 $ 1.7 $ 6.3 $ 1.7 $ 33.9 $ — $ 179.6 Property lease revenue 1,160.8 296.5 241.7 86.1 331.7 2.5 2,119.3 Total revenue $ 1,296.8 $ 298.2 $ 248.0 $ 87.8 $ 365.6 $ 2.5 $ 2,298.9 Six Months Ended June 30, 2022 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers (1) Total Non-lease property revenue $ 148.0 $ 7.9 $ 14.2 $ 9.2 $ 75.9 $ 51.8 $ 307.0 Services revenue 119.3 — — — — — 119.3 Total non-lease revenue $ 267.3 $ 7.9 $ 14.2 $ 9.2 $ 75.9 $ 51.8 $ 426.3 Property lease revenue 2,320.3 588.6 539.1 368.1 768.6 323.6 4,908.3 Total revenue $ 2,587.6 $ 596.5 $ 553.3 $ 377.3 $ 844.5 $ 375.4 $ 5,334.6 Six Months Ended June 30, 2021 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers (1) Total Non-lease property revenue $ 141.7 $ 4.2 $ 11.2 $ 3.9 $ 65.8 $ — $ 226.8 Services revenue 94.7 — — — — — 94.7 Total non-lease revenue $ 236.4 $ 4.2 $ 11.2 $ 3.9 $ 65.8 $ — $ 321.5 Property lease revenue 2,318.0 575.4 472.5 128.5 636.5 5.0 4,135.9 Total revenue $ 2,554.4 $ 579.6 $ 483.7 $ 132.4 $ 702.3 $ 5.0 $ 4,457.4 _______________ (1) Data Centers consists of the Company’s data center facilities located in the United States. For the three and six months ended June 30, 2021, revenue attributable to the Company’s data center assets previously reported in the U.S. & Canada property segment is now shown in the Data Centers segment.

PREPAID AND OTHER CURRENT ASS_2

PREPAID AND OTHER CURRENT ASSETS (Tables)	6 Months Ended
	Jun. 30, 2022
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, 2022 December 31, 2021 Prepaid assets $ 126.2 $ 94.5 Prepaid income tax 137.6 128.6 Unbilled receivables 283.2 269.6 Value added tax and other consumption tax receivables 93.7 83.9 Other miscellaneous current assets 89.1 80.6 Prepaid and other current assets $ 729.8 $ 657.2

LEASES (Tables)

LEASES (Tables)	6 Months Ended
	Jun. 30, 2022
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, 2022 were as follows: Fiscal Year Amount (1) Remainder of 2022 $ 3,333.2 2023 7,235.7 2024 6,963.5 2025 6,443.2 2026 5,858.5 Thereafter 30,175.5 Total $ 60,009.6 _______________
Schedule of Information About Other Lease-related Balances	Information about other lease-related balances is as follows: As of June 30, 2022 December 31, 2021 Operating leases: Right-of-use asset $ 9,159.2 $ 9,225.1 Current portion of lease liability $ 762.6 $ 712.6 Lease liability 7,862.0 8,041.8 Total operating lease liability $ 8,624.6 $ 8,754.4
Schedule of Components of Operating Lease Cost	The weighted-average remaining lease terms and incremental borrowing rates are as follows: As of June 30, 2022 December 31, 2021 Operating leases: Weighted-average remaining lease term (years) 12.5 13.0 Weighted-average incremental borrowing rate 5.1 % 5.1 % The following table sets forth the components of lease cost: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Operating lease cost $ 304.2 $ 268.4 $ 610.7 $ 519.7 Variable lease costs not included in lease liability (1) 96.3 85.1 197.7 154.4 ______________ (1) Includes property tax paid on behalf of the landlord. Supplemental cash flow information is as follows: Six Months Ended June 30, 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ (636.2) $ (507.0) Non-cash items: New operating leases (1) $ 234.9 $ 1,443.3 Operating lease modifications and reassessments $ 105.9 $ 166.8 _______________ (1) Amount includes new operating leases and leases acquired in connection with acquisitions. For the six months ended June 30, 2021, includes $1.3 billion related to the Telxius Acquisition (as defined in note 14).
Schedule of Maturity of Operating Lease Liabilities	Maturities of operating lease liabilities as of June 30, 2022 were as follows: Fiscal Year Operating Lease (1) Remainder of 2022 $ 562.9 2023 1,087.5 2024 1,042.8 2025 983.3 2026 930.6 Thereafter 7,082.3 Total lease payments 11,689.4 Less amounts representing interest (3,064.8) Total lease liability 8,624.6 Less current portion of lease liability 762.6 Non-current lease liability $ 7,862.0 _______________ (1) Balances are translated at the applicable period-end exchange rate, which may impact comparability between periods.

GOODWILL AND OTHER INTANGIBLE_2

GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)	6 Months Ended
	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [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 Asia-Pacific Africa Europe Latin America Data Centers Balance as of January 1, 2022 $ 4,648.4 $ 990.1 $ 612.2 $ 3,230.4 $ 888.6 $ 2,978.4 $ 2.0 $ 13,350.1 Adjustments (1) — — — 11.7 4.3 (60.3) — (44.3) Other (2) (7.4) — — — — — — (7.4) Effect of foreign currency translation (0.8) (58.3) (44.3) (254.3) 28.8 — — (328.9) Balance as of June 30, 2022 $ 4,640.2 $ 931.8 $ 567.9 $ 2,987.8 $ 921.7 $ 2,918.1 $ 2.0 $ 12,969.5 _______________ (1) Europe and Latin America consist of measurement period adjustments related to the Telxius Acquisition. Data Centers consists of measurement period adjustments related to the CoreSite Acquisition. (2) Other represents the goodwill associated with certain operations acquired in connection with the Company’s acquisition of InSite Wireless Group, LLC. These business operations were sold during the six months ended June 30, 2022.
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, 2022 As of December 31, 2021 Estimated Useful Gross Accumulated Net Book Gross Accumulated Net Book Acquired network location intangibles (1) Up to 20 $ 6,172.4 $ (2,439.0) $ 3,733.4 $ 6,294.6 $ (2,305.1) $ 3,989.5 Acquired tenant-related intangibles Up to 20 19,572.1 (5,526.0) 14,046.1 20,030.5 (5,051.5) 14,979.0 Acquired licenses and other intangibles 2-20 1,735.2 (289.1) 1,446.1 1,807.9 (49.2) 1,758.7 Total other intangible assets $ 27,479.7 $ (8,254.1) $ 19,225.6 $ 28,133.0 $ (7,405.8) $ 20,727.2 _______________ (1) Acquired network location intangibles are amortized over the shorter of the term of the corresponding ground lease, taking into consideration lease renewal options and residual value, generally up to 20 years, as the Company considers these intangibles to be directly related to the tower assets.
Schedule of Expected Future Amortization Expenses	Based on current exchange rates, the Company expects to record amortization expense as follows over the remaining current year and the five subsequent years: Fiscal Year Amount Remainder of 2022 $ 893.5 2023 1,612.2 2024 1,383.4 2025 1,352.7 2026 1,317.5 2027 1,314.9

ACCRUED EXPENSES (Tables)

ACCRUED EXPENSES (Tables)	6 Months Ended
	Jun. 30, 2022
Accrued Liabilities, Current [Abstract]
Schedule of Accrued Expenses	Accrued expenses consisted of the following: As of June 30, 2022 December 31, 2021 Accrued construction costs $ 129.2 $ 197.3 Accrued income tax payable 19.8 84.8 Accrued pass-through costs 137.9 91.0 Amounts payable for acquisitions 85.4 95.2 Amounts payable to tenants 87.2 81.1 Accrued property and real estate taxes 281.7 255.3 Accrued rent 79.0 78.8 Payroll and related withholdings 98.3 124.7 Other accrued expenses 343.7 404.6 Total accrued expenses $ 1,262.2 $ 1,412.8

LONG-TERM OBLIGATIONS (Tables)

LONG-TERM OBLIGATIONS (Tables)	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	Outstanding amounts under the Company’s long-term obligations, reflecting discounts, premiums, debt issuance costs and fair value adjustments due to interest rate swaps consisted of the following: As of June 30, 2022 December 31, 2021 Maturity Date 2021 Multicurrency Credit Facility (1) (2) $ 4,545.5 $ 4,388.4 June 30, 2025 2021 Term Loan (1) 995.8 995.4 January 31, 2027 2021 Credit Facility (1) 2,065.0 1,410.0 January 31, 2027 2021 EUR Three Year Delayed Draw Term Loan (1) (2) 864.4 937.6 May 28, 2024 2021 USD 364-Day Delayed Draw Term Loan (1) 599.3 2,998.5 December 28, 2022 2021 USD Two Year Delayed Draw Term Loan (1) 1,498.8 1,498.4 December 28, 2023 2.250% senior notes (3) — 600.3 N/A 3.50% senior notes 998.9 997.9 January 31, 2023 3.000% senior notes 695.1 709.9 June 15, 2023 0.600% senior notes 498.4 497.9 January 15, 2024 5.00% senior notes 1,000.7 1,000.9 February 15, 2024 3.375% senior notes 647.6 647.0 May 15, 2024 2.950% senior notes 645.5 644.7 January 15, 2025 2.400% senior notes 746.7 746.1 March 15, 2025 1.375% senior notes (4) 520.3 563.8 April 4, 2025 4.000% senior notes 746.1 745.5 June 1, 2025 1.300% senior notes 496.8 496.4 September 15, 2025 4.400% senior notes 497.9 497.6 February 15, 2026 1.600% senior notes 695.7 695.2 April 15, 2026 1.950% senior notes (4) 520.6 564.3 May 22, 2026 1.450% senior notes 593.7 593.0 September 15, 2026 3.375% senior notes 992.0 991.2 October 15, 2026 3.125% senior notes 398.4 398.3 January 15, 2027 2.750% senior notes 745.6 745.2 January 15, 2027 0.450% senior notes (4) 781.0 847.1 January 15, 2027 0.400% senior notes (4) 518.7 562.5 February 15, 2027 3.650% senior notes 642.4 — March 15, 2027 3.55% senior notes 745.9 745.5 July 15, 2027 3.600% senior notes 694.7 694.3 January 15, 2028 0.500% senior notes (4) 779.2 845.3 January 15, 2028 1.500% senior notes 646.1 645.8 January 31, 2028 3.950% senior notes 592.1 591.6 March 15, 2029 0.875% senior notes (4) 780.9 847.3 May 21, 2029 3.800% senior notes 1,636.0 1,635.1 August 15, 2029 2.900% senior notes 743.0 742.5 January 15, 2030 2.100% senior notes 741.7 741.2 June 15, 2030 0.950% senior notes (4) 517.0 561.0 October 5, 2030 1.875% senior notes 791.9 791.4 October 15, 2030 2.700% senior notes 694.0 693.7 April 15, 2031 2.300% senior notes 691.4 691.0 September 15, 2031 1.000% senior notes (4) 674.3 731.7 January 15, 2032 4.050% senior notes 641.8 — March 15, 2032 1.250% senior notes (4) 517.1 561.2 May 21, 2033 3.700% senior notes 592.2 592.1 October 15, 2049 3.100% senior notes 1,038.1 1,038.0 June 15, 2050 2.950% senior notes 1,021.8 1,021.5 January 15, 2051 Total American Tower Corporation debt 38,490.1 39,943.3 Series 2013-2A securities (5) 1,298.9 1,298.2 March 15, 2023 Series 2018-1A securities (5) 495.7 495.3 March 15, 2028 Series 2015-2 notes (6) 523.1 522.7 June 16, 2025 CoreSite Debt (7) — 955.1 N/A Other subsidiary debt (8) 5.9 8.0 Various Total American Tower subsidiary debt 2,323.6 3,279.3 Finance lease obligations 30.3 31.6 Total 40,844.0 43,254.2 Less current portion of long-term obligations (3,603.9) (4,568.7) Long-term obligations $ 37,240.1 $ 38,685.5 _______________ (1) Accrues interest at a variable rate. (2) As of June 30, 2022 reflects borrowings denominated in Euro (“EUR”) and, for the 2021 Multicurrency Credit Facility (as defined below), reflects borrowings denominated in both EUR and U.S. Dollars (“USD”). (3) Repaid in full on January 14, 2022 using borrowings under the 2021 Credit Facility (as defined below). (4) Notes are denominated in EUR. (5) Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2048. (6) Maturity date reflects the anticipated repayment date; final legal maturity is June 15, 2050. (7) Debt entered into by CoreSite assumed in connection with the CoreSite Acquisition (the “CoreSite Debt”). On January 7, 2022, all amounts outstanding under the CoreSite Debt were repaid using borrowings under the 2021 Multicurrency Credit Facility and cash on hand. (8) Includes debt entered into by the Company’s Kenyan subsidiary in connection with an acquisition of communications sites in Kenya, which is denominated in USD and is payable either (i) in future installments subject to the satisfaction of specified conditions or (ii) five years from the note origination date, including the exercise of the optional two year extension, subject to the satisfaction of specified conditions. As of December 31, 2021, also included U.S. subsidiary debt related to a seller-financed acquisition. The key terms of the 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) 3.650% Notes $ 650.0 April 1, 2022 March 15, 2027 3.650% September 15, 2022 March 15 and September 15 February 15, 2027 4.050% Notes $ 650.0 April 1, 2022 March 15, 2032 4.050% September 15, 2022 March 15 and September 15 December 15, 2031 ___________ (1) Accrued and unpaid interest on USD denominated notes is payable in USD semi-annually in arrears and will be computed from the issue date on the basis of a 360-day year comprised of twelve 30-day months. (2) The Company may redeem the Notes at any time, in whole or in part, at a redemption price equal to 100% of the principal amount of the Notes plus a make-whole premium, together with accrued interest to the redemption date. If the Company redeems the Notes on or after the par call date, the Company will not be required to pay a make-whole premium.
Schedule of Maturities of Long-term Debt	As of June 30, 2022, the key terms under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the Company’s $1.0 billion unsecured term loan, as amended and restated in December 2021 (the “2021 Term Loan”), the Company’s 825.0 million EUR unsecured term loan, as amended and restated in December 2021 (the “2021 EUR Three Year Delayed Draw Term Loan”), the 2021 USD 364-Day Delayed Draw Term Loan and the Company’s $1.5 billion unsecured term loan entered into in December 2021 (the “2021 USD Two Year Delayed Draw Term Loan”) were as follows: Outstanding Principal Balance Undrawn letters of credit Maturity Date Current margin over LIBOR or EURIBOR (1) Current commitment fee (2) 2021 Multicurrency Credit Facility $ 4,545.5 $ 3.5 June 30, 2025 (3) 1.125 % 0.110 % 2021 Credit Facility 2,065.0 24.2 January 31, 2027 (3) 1.125 % 0.110 % 2021 Term Loan 1,000.0 N/A January 31, 2027 1.125 % N/A 2021 EUR Three Year Delayed Draw Term Loan 864.9 N/A May 28, 2024 1.125 % N/A 2021 USD 364-Day Delayed Draw Term Loan 600.0 N/A December 28, 2022 1.125 % N/A 2021 USD Two Year Delayed Draw Term Loan 1,500.0 N/A December 28, 2023 1.125 % N/A _______________ (1) LIBOR applies to the USD denominated borrowings under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the 2021 Term Loan, the 2021 USD 364-Day Delayed Draw Term Loan and the 2021 USD Two Year Delayed Draw Term Loan. Euro Interbank Offer Rate (“EURIBOR”) applies to the EUR denominated borrowings under the 2021 Multicurrency Credit Facility and all of the borrowings under the 2021 EUR Three Year Delayed Draw Term Loan. (2) Fee on undrawn portion of each credit facility.

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	6 Months Ended
	Jun. 30, 2022
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.
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, 2022 December 31, 2021 Fair Value Measurements Using Fair Value Measurements Using Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets: Interest rate swap agreements — $ — — — $ 11.0 — Investments in equity securities (1) $ 29.3 — — $ 37.1 — — Liabilities: Interest rate swap agreements — $ 4.7 — — — — Fair value of debt related to interest rate swap agreements (2) $ (3.6) — — $ 12.2 — — _______________ (1) Investments in equity securities are recorded in Notes receivable and other non-current assets in the consolidated balance sheet 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 the three and six months ended June 30, 2022, the Company recognized unrealized losses of $17.3 million and $7.8 million, respectively, for equity securities held as of June 30, 2022. (2) Included in the carrying values of the corresponding debt obligations.

INCOME TAXES (Tables)

INCOME TAXES (Tables)	6 Months Ended
	Jun. 30, 2022
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, 2022 and 2021: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Penalties and income tax-related interest expense (1) $ 4.2 $ 29.8 $ 11.5 $ 33.5 _______________ (1) Three and six months ended June 30, 2021 reflect an increase of $16.6 million due to a reclassification of unrecognized tax benefits to penalties and income tax-related interest expense.

STOCK-BASED COMPENSATION (Table

STOCK-BASED COMPENSATION (Tables)	6 Months Ended
	Jun. 30, 2022
Share-Based Payment Arrangement [Abstract]
Schedule of Stock-Based Compensation Expenses	During the three and six months ended June 30, 2022 and 2021, 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, 2022 2021 2022 2021 Stock-based compensation expense $ 42.2 $ 31.9 $ 98.9 $ 69.9
Schedule of Option Activity	The Company’s option activity for the six months ended June 30, 2022 was as follows (shares disclosed in full amounts): Number of Options Outstanding as of January 1, 2022 1,067,999 Exercised (143,456) Forfeited — Expired — Outstanding as of June 30, 2022 924,543
Schedule of RSU and PSU Activity	The Company’s RSU and PSU activity for the six months ended June 30, 2022 was as follows (shares disclosed in full amounts): RSUs PSUs Outstanding as of January 1, 2022 (1) (2) 1,298,178 267,621 Granted (3) 702,278 98,542 Vested and Released (4) (533,157) (98,188) Forfeited (43,181) — Outstanding as of June 30, 2022 1,424,118 267,975 _______________ (1) RSUs include 125,841 shares of the CoreSite Replacement Awards. (2) PSUs consist of the target number of shares issuable at the end of the three-year performance period for the outstanding 2021 PSUs and the outstanding 2020 PSUs, or 98,694 shares and 70,739 shares, respectively, and the shares issuable at the end of the three-year performance period for the PSUs granted in 2019 (the “2019 PSUs”) based on achievement against the performance metrics for the three-year performance period, or 98,188 shares. (3) PSUs consist of the target number of shares issuable at the end of the three-year performance period for the 2022 PSUs, or 98,542 shares. (4) Includes 17,121 shares of previously vested and deferred RSUs. PSUs consist of shares vested pursuant to the 2019 PSUs. There are no additional shares to be earned related to the 2019 PSUs.

EQUITY (Tables)

EQUITY (Tables)	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
Schedule of Dividends Declared	During the six months ended June 30, 2022, 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 18, 2022 July 8, 2022 June 17, 2022 $ 1.43 $ 665.8 March 10, 2022 April 29, 2022 April 13, 2022 $ 1.40 $ 638.8 December 15, 2021 January 14, 2022 December 27, 2021 $ 1.39 $ 633.5 _______________ (1) Does not include amounts accrued for distributions payable related to unvested restricted stock units. During the six months ended June 30, 2021, 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 27, 2021 July 9, 2021 June 18, 2021 $ 1.27 $ 577.8 March 4, 2021 April 29, 2021 April 13, 2021 $ 1.24 $ 551.5 December 3, 2020 February 2, 2021 December 28, 2020 $ 1.21 $ 537.6 _______________

NONCONTROLLING INTEREST (Tables

NONCONTROLLING INTEREST (Tables)	6 Months Ended
	Jun. 30, 2022
Noncontrolling Interest [Abstract]
Schedule of Changes in Noncontrolling Interests	The changes in noncontrolling interests were as follows: Six Months Ended June 30, 2022 2021 Balance as of January 1, $ 3,988.4 $ 474.9 Adjustment to noncontrolling interest due to reorganization (1) — 601.0 Redemption of noncontrolling interest (2) — (1.7) Net (loss) income attributable to noncontrolling interests (16.3) 5.4 Foreign currency translation adjustment attributable to noncontrolling interests, net of tax (252.7) (10.1) Contributions from noncontrolling interest holders 48.4 — Distributions to noncontrolling interest holders (0.3) (0.3) Balance as of June 30, $ 3,767.5 $ 1,069.2 _______________ (1) Represents the impact of the reorganization of European interests described above on Noncontrolling interests.

EARNINGS PER COMMON SHARE (Tabl

EARNINGS PER COMMON SHARE (Tables)	6 Months Ended
	Jun. 30, 2022
Earnings Per Share [Abstract]
Schedule of Earnings Per Basic and Diluted by Common Class	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, 2022 2021 2022 2021 Net income attributable to American Tower Corporation common stockholders $ 898.2 $ 746.3 $ 1,609.9 $ 1,391.3 Basic weighted average common shares outstanding 458,776 450,617 457,369 447,569 Dilutive securities 1,043 1,737 1,195 1,821 Diluted weighted average common shares outstanding 459,819 452,354 458,564 449,390 Basic net income attributable to American Tower Corporation common stockholders per common share $ 1.96 $ 1.66 $ 3.52 $ 3.11 Diluted net income attributable to American Tower Corporation common stockholders per common share $ 1.95 $ 1.65 $ 3.51 $ 3.10
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, 2022 2021 2022 2021 Restricted stock units 89 3 114 1

ACQUISITIONS (Tables)

ACQUISITIONS (Tables)	6 Months Ended
	Jun. 30, 2022
Business Combination and Asset Acquisition [Abstract]
Schedule of Merger and Acquisition Related Costs	During the three and six months ended June 30, 2022 and 2021, the Company recorded acquisition and merger related expenses for business combinations and non-capitalized asset acquisition costs and integration costs as follows: Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Acquisition and merger related expenses $ 3.5 $ 28.9 $ 9.2 $ 63.5 Integration costs $ 14.8 $ 9.4 $ 24.8 $ 26.0
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the allocations of the purchase prices for the fiscal year 2022 acquisitions based upon their estimated fair value at the date of acquisition: Other Current assets $ 27.0 Property and equipment 54.6 Intangible assets (1): Tenant-related intangible assets 122.4 Network location intangible assets 14.1 Other intangible assets — Other non-current assets 16.3 Current liabilities (0.6) Deferred tax liability — Other non-current liabilities (19.6) Net assets acquired 214.2 Goodwill — Fair value of net assets acquired 214.2 Purchase price $ 214.2 _______________ (1) Tenant-related intangible assets and network location intangible assets are amortized on a straight-line basis generally over a 20 year period. The following table summarizes the preliminary and updated allocations of the purchase price paid and the amounts of assets acquired and liabilities assumed for the Telxius Acquisition based upon its estimated fair value at the date of acquisition. Balances are reflected in the accompanying consolidated balance sheet as of June 30, 2022. Preliminary Allocation (1) Updated Allocation Current assets $ 289.0 $ 284.1 Property and equipment 1,417.7 1,323.6 Intangible assets (2): Tenant-related intangible assets 5,391.2 5,381.8 Network location intangible assets 675.8 674.5 Other intangible assets — — Other non-current assets 1,380.3 1,454.3 Current liabilities (331.9) (345.2) Deferred tax liability (1,227.5) (1,191.7) Other non-current liabilities (1,504.8) (1,522.1) Net assets acquired 6,089.8 6,059.3 Goodwill 3,500.0 3,533.0 Fair value of net assets acquired 9,589.8 9,592.3 Purchase price $ 9,589.8 $ 9,592.3 _______________ (1) Balances reflect the preliminary allocation as of September 30, 2021 following the August 2, 2021 closing of the second tranche of the Telxius Acquisition in Germany. (2) Tenant-related intangible assets and network location intangible assets are amortized on a straight-line basis generally over a 20 year period. The following table summarizes the preliminary and updated allocation of the purchase price paid and the amounts of assets acquired and liabilities assumed for the CoreSite Acquisition based upon its estimated fair value at the date of acquisition. Balances are reflected in the accompanying consolidated balance sheet as of June 30, 2022. Preliminary Allocation Updated Allocation Current assets $ 99.8 $ 99.6 Property and equipment 5,129.0 5,289.5 Intangible assets (1): Tenant-related intangible assets 665.0 655.0 Network location intangible assets — — Other intangible assets 1,709.0 1,636.3 Other non-current assets 332.9 330.1 Current liabilities (156.6) (153.6) Deferred tax liability — — Other non-current liabilities (323.1) (340.6) Net assets acquired 7,456.0 $ 7,516.3 Goodwill 2,943.3 2,883.0 Fair value of net assets acquired 10,399.3 10,399.3 Debt assumed (955.1) (955.1) Purchase price $ 9,444.2 $ 9,444.2 _______________ (1) Tenant-related intangible assets are amortized on a straight-line basis generally over a 20 year period. Other intangible assets are amortized on a straight-line basis generally over periods ranging from approximately 2 years to 10 years.
Schedule of Pro Forma Information	The following table presents the unaudited pro forma financial results as if the 2022 acquisitions had occurred on January 1, 2021 and the 2021 acquisitions had occurred on January 1, 2020. The pro forma results, to the extent available, are based on historical information, and accordingly may not fully reflect the current operations of the acquired business. In addition, the pro forma results do not include any anticipated cost synergies, costs or other integration impacts. Accordingly, such pro forma amounts are not necessarily indicative of the results that actually would have occurred had the transactions been completed on the dates indicated, nor are they indicative of the future operating results of the Company. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Pro forma revenues $ 2,675.5 $ 2,604.9 $ 5,338.3 $ 5,109.1 Pro forma net income attributable to American Tower Corporation common stockholders $ 898.4 $ 659.4 $ 1,610.1 $ 1,209.6 Pro forma net income per common share amounts: Basic net income attributable to American Tower Corporation common stockholders $ 1.93 $ 1.42 $ 3.46 $ 2.61 Diluted net income attributable to American Tower Corporation common stockholders $ 1.93 $ 1.42 $ 3.45 $ 2.60

BUSINESS SEGMENTS (Tables)

BUSINESS SEGMENTS (Tables)	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
Schedule of Summarized Financial Information Concerning the Company's Reportable Segments	Summarized financial information concerning the Company’s reportable segments for the three and six months ended June 30, 2022 and 2021 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 Services Other Total Three Months Ended June 30, 2022 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers Segment revenues $ 1,235.9 $ 298.0 $ 285.5 $ 178.8 $ 425.2 $ 191.1 $ 2,614.5 $ 59.8 $ 2,674.3 Segment operating expenses 212.6 181.7 111.9 75.3 133.5 79.0 794.0 28.9 822.9 Segment gross margin 1,023.3 116.3 173.6 103.5 291.7 112.1 1,820.5 30.9 1,851.4 Segment selling, general, administrative and development expense (1) 43.5 6.1 22.0 14.1 25.9 15.5 127.1 5.1 132.2 Segment operating profit $ 979.8 $ 110.2 $ 151.6 $ 89.4 $ 265.8 $ 96.6 $ 1,693.4 $ 25.8 $ 1,719.2 Stock-based compensation expense $ 42.2 42.2 Other selling, general, administrative and development expense 48.5 48.5 Depreciation, amortization and accretion 826.5 826.5 Other income (2) (96.3) (96.3) Income from continuing operations before income taxes $ 898.3 Total assets $ 26,882.2 $ 4,972.0 $ 4,752.8 $ 11,259.4 $ 8,736.9 $ 10,890.6 $ 67,493.9 $ 84.7 $ 538.2 $ 68,116.8 _______________ (1) Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $42.2 million. (2) Primarily includes gains from foreign currency exchange rate fluctuations, partially offset by interest expense. Property Total Services Other Total Three Months Ended June 30, 2021 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers Segment revenues $ 1,230.9 $ 298.2 $ 248.0 $ 87.8 $ 365.6 $ 2.5 $ 2,233.0 $ 65.9 $ 2,298.9 Segment operating expenses 210.8 183.8 85.7 29.9 112.1 1.0 623.3 24.6 647.9 Segment gross margin 1,020.1 114.4 162.3 57.9 253.5 1.5 1,609.7 41.3 1,651.0 Segment selling, general, administrative and development expense (1) 41.1 24.1 17.5 7.9 30.0 1.3 121.9 4.1 126.0 Segment operating profit $ 979.0 $ 90.3 $ 144.8 $ 50.0 $ 223.5 $ 0.2 $ 1,487.8 $ 37.2 $ 1,525.0 Stock-based compensation expense $ 31.9 31.9 Other selling, general, administrative and development expense 49.3 49.3 Depreciation, amortization and accretion 554.8 554.8 Other expense (2) 68.3 68.3 Income from continuing operations before income taxes $ 820.7 Total assets $ 27,315.6 $ 5,140.8 $ 5,031.5 $ 11,566.7 $ 9,240.0 $ 94.3 $ 58,388.9 $ 88.5 $ 505.5 $ 58,982.9 _______________ (1) Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $31.9 million. (2) Primarily includes interest expense, partially offset by gains from foreign currency exchange rate fluctuations. Property Total Services Other Total Six Months Ended June 30, 2022 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers Segment revenues $ 2,468.3 $ 596.5 $ 553.3 $ 377.3 $ 844.5 $ 375.4 $ 5,215.3 $ 119.3 $ 5,334.6 Segment operating expenses 412.4 356.8 209.6 167.6 263.5 155.6 1,565.5 56.8 1,622.3 Segment gross margin 2,055.9 239.7 343.7 209.7 581.0 219.8 3,649.8 62.5 3,712.3 Segment selling, general, administrative and development expense (1) 86.3 54.0 44.5 29.0 54.7 31.9 300.4 11.1 311.5 Segment operating profit $ 1,969.6 $ 185.7 $ 299.2 $ 180.7 $ 526.3 $ 187.9 $ 3,349.4 $ 51.4 $ 3,400.8 Stock-based compensation expense $ 98.9 98.9 Other selling, general, administrative and development expense 106.4 106.4 Depreciation, amortization and accretion 1,642.3 1,642.3 Other income (2) (70.3) (70.3) Income from continuing operations before income taxes $ 1,623.5 _______________ (1) Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $98.9 million. (2) Primarily includes gains from foreign currency exchange rate fluctuations, partially offset by interest expense. Property Total Services Other Total Six Months Ended June 30, 2021 U.S. & Canada Asia-Pacific Africa Europe Latin America Data Centers Segment revenues $ 2,459.7 $ 579.6 $ 483.7 $ 132.4 $ 702.3 $ 5.0 $ 4,362.7 $ 94.7 $ 4,457.4 Segment operating expenses 407.8 359.3 166.6 37.7 213.3 1.9 1,186.6 35.6 1,222.2 Segment gross margin 2,051.9 220.3 317.1 94.7 489.0 3.1 3,176.1 59.1 3,235.2 Segment selling, general, administrative and development expense (1) 79.4 31.2 36.4 13.5 53.3 2.3 216.1 8.3 224.4 Segment operating profit $ 1,972.5 $ 189.1 $ 280.7 $ 81.2 $ 435.7 $ 0.8 $ 2,960.0 $ 50.8 $ 3,010.8 Stock-based compensation expense $ 69.9 69.9 Other selling, general, administrative and development expense 95.5 95.5 Depreciation, amortization and accretion 1,077.3 1,077.3 Other expense (2) 244.8 244.8 Income from continuing operations before income taxes $ 1,523.3 _______________ (1) Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $69.9 million. (2) Primarily includes interest expense, partially offset by gains from foreign currency exchange rate fluctuations.

BASIS OF PRESENTATION AND SIG_4

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 reportableSegment	Jun. 30, 2022 USD ($)	Jun. 30, 2022 segment	Jun. 30, 2021 USD ($)
Concentration Risk [Line Items]
Number of reportable segments			7		5
Straight-line revenue	$ 113.3	$ 104.8		$ 222.7		$ 224.7
ATC Europe
Concentration Risk [Line Items]
Ownership percentage	52%		52%	52%	52%
Joint Venture - Bangladesh Operations
Concentration Risk [Line Items]
Ownership percentage	51%		51%	51%	51%
Germany | ATC Europe
Concentration Risk [Line Items]
Ownership percentage	87%		87%	87%	87%
Spain | ATC Europe
Concentration Risk [Line Items]
Ownership percentage	83%		83%	83%	83%

BASIS OF PRESENTATION AND SIG_5

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Cash, Cash Equivalents, And Restricted Cash (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 2,066.7	$ 1,949.9	$ 1,928
Restricted cash	136.4	393.4	72.8
Total cash, cash equivalents and restricted cash	$ 2,203.1	$ 2,343.3	$ 2,000.8	$ 1,861.4

BASIS OF PRESENTATION AND SIG_6

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total non-lease revenue	$ 217	$ 179.6	$ 426.3	$ 321.5
Property lease revenue	2,457.3	2,119.3	4,908.3	4,135.9
Total revenue	2,674.3	2,298.9	5,334.6	4,457.4
U.S. & Canada
Disaggregation of Revenue [Line Items]
Total non-lease revenue	133.6	136	267.3	236.4
Property lease revenue	1,162.1	1,160.8	2,320.3	2,318
Total revenue	1,295.7	1,296.8	2,587.6	2,554.4
Asia-Pacific
Disaggregation of Revenue [Line Items]
Total non-lease revenue	4.9	1.7	7.9	4.2
Property lease revenue	293.1	296.5	588.6	575.4
Total revenue	298	298.2	596.5	579.6
Africa
Disaggregation of Revenue [Line Items]
Total non-lease revenue	7.1	6.3	14.2	11.2
Property lease revenue	278.4	241.7	539.1	472.5
Total revenue	285.5	248	553.3	483.7
Europe
Disaggregation of Revenue [Line Items]
Total non-lease revenue	6.8	1.7	9.2	3.9
Property lease revenue	172	86.1	368.1	128.5
Total revenue	178.8	87.8	377.3	132.4
Latin America
Disaggregation of Revenue [Line Items]
Total non-lease revenue	38.6	33.9	75.9	65.8
Property lease revenue	386.6	331.7	768.6	636.5
Total revenue	425.2	365.6	844.5	702.3
Data Centers
Disaggregation of Revenue [Line Items]
Total non-lease revenue	26	0	51.8	0
Property lease revenue	165.1	2.5	323.6	5
Total revenue	191.1	2.5	375.4	5
Non-lease property revenue
Disaggregation of Revenue [Line Items]
Total non-lease revenue	157.2	113.7	307	226.8
Non-lease property revenue | U.S. & Canada
Disaggregation of Revenue [Line Items]
Total non-lease revenue	73.8	70.1	148	141.7
Non-lease property revenue | Asia-Pacific
Disaggregation of Revenue [Line Items]
Total non-lease revenue	4.9	1.7	7.9	4.2
Non-lease property revenue | Africa
Disaggregation of Revenue [Line Items]
Total non-lease revenue	7.1	6.3	14.2	11.2
Non-lease property revenue | Europe
Disaggregation of Revenue [Line Items]
Total non-lease revenue	6.8	1.7	9.2	3.9
Non-lease property revenue | Latin America
Disaggregation of Revenue [Line Items]
Total non-lease revenue	38.6	33.9	75.9	65.8
Non-lease property revenue | Data Centers
Disaggregation of Revenue [Line Items]
Total non-lease revenue	26	0	51.8	0
Services revenue
Disaggregation of Revenue [Line Items]
Total non-lease revenue	59.8	65.9	119.3	94.7
Services revenue | U.S. & Canada
Disaggregation of Revenue [Line Items]
Total non-lease revenue	59.8	65.9	119.3	94.7
Services revenue | Asia-Pacific
Disaggregation of Revenue [Line Items]
Total non-lease revenue	0	0	0	0
Services revenue | Africa
Disaggregation of Revenue [Line Items]
Total non-lease revenue	0	0	0	0
Services revenue | Europe
Disaggregation of Revenue [Line Items]
Total non-lease revenue	0	0	0	0
Services revenue | Latin America
Disaggregation of Revenue [Line Items]
Total non-lease revenue	0	0	0	0
Services revenue | Data Centers
Disaggregation of Revenue [Line Items]
Total non-lease revenue	$ 0	$ 0	$ 0	$ 0

PREPAID AND OTHER CURRENT ASS_3

PREPAID AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid assets	$ 126.2	$ 94.5
Prepaid income tax	137.6	128.6
Unbilled receivables	283.2	269.6
Value added tax and other consumption tax receivables	93.7	83.9
Other miscellaneous current assets	89.1	80.6
Prepaid and other current assets	$ 729.8	$ 657.2

LEASES - Future Minimum Rental

LEASES - Future Minimum Rental Receipts Expected Under Operating Leases (Details) $ in Millions	Jun. 30, 2022 USD ($)
Leases [Abstract]
Remainder of 2022	$ 3,333.2
2023	7,235.7
2024	6,963.5
2025	6,443.2
2026	5,858.5
Thereafter	30,175.5
Total	$ 60,009.6

LEASES - Information About Othe

LEASES - Information About Other Lease-related Balances (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Operating leases:
Right-of-use asset	$ 9,159.2	$ 9,225.1
Current portion of lease liability	762.6	712.6
Lease liability	7,862	8,041.8
Total lease liability	$ 8,624.6	$ 8,754.4

LEASES - Schedule Of Weighted A

LEASES - Schedule Of Weighted Average Lease Terms And Discount Rates (Details)	Jun. 30, 2022	Dec. 31, 2021
Operating leases:
Weighted-average remaining lease term (years)	12 years 6 months	13 years
Weighted-average incremental borrowing rate	5.10%	5.10%

LEASES - Lease Costs (Details)

LEASES - Lease Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Leases [Abstract]
Operating lease cost	$ 304.2	$ 268.4	$ 610.7	$ 519.7
Variable lease costs not included in lease liability	$ 96.3	$ 85.1	$ 197.7	$ 154.4

LEASES - Supplemental Cash Flow

LEASES - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ (636.2)	$ (507)
Non-cash items:
New operating leases	234.9	1,443.3
Operating lease modifications and reassessments	$ 105.9	166.8
Telxius Telecom S.A.
Non-cash items:
New operating leases		$ 1,300

LEASES - Maturities Of Operatin

LEASES - Maturities Of Operating Leases (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Leases [Abstract]
Remainder of 2022	$ 562.9
2023	1,087.5
2024	1,042.8
2025	983.3
2026	930.6
Thereafter	7,082.3
Total lease payments	11,689.4
Less amounts representing interest	(3,064.8)
Total lease liability	8,624.6	$ 8,754.4
Current portion of lease liability	762.6	712.6
Non-current lease liability	$ 7,862	$ 8,041.8

GOODWILL AND OTHER INTANGIBLE_3

GOODWILL AND OTHER INTANGIBLE ASSETS - Changes In The Carrying Value Of Goodwill (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 13,350.1
Adjustments	(44.3)
Other	(7.4)
Effect of foreign currency translation	(328.9)
Goodwill, ending balance	12,969.5
U.S. & Canada
Goodwill [Roll Forward]
Goodwill, beginning balance	4,648.4
Adjustments	0
Other	(7.4)
Effect of foreign currency translation	(0.8)
Goodwill, ending balance	4,640.2
Asia-Pacific
Goodwill [Roll Forward]
Goodwill, beginning balance	990.1
Adjustments	0
Other	0
Effect of foreign currency translation	(58.3)
Goodwill, ending balance	931.8
Africa
Goodwill [Roll Forward]
Goodwill, beginning balance	612.2
Adjustments	0
Other	0
Effect of foreign currency translation	(44.3)
Goodwill, ending balance	567.9
Europe
Goodwill [Roll Forward]
Goodwill, beginning balance	3,230.4
Adjustments	11.7
Other	0
Effect of foreign currency translation	(254.3)
Goodwill, ending balance	2,987.8
Latin America
Goodwill [Roll Forward]
Goodwill, beginning balance	888.6
Adjustments	4.3
Other	0
Effect of foreign currency translation	28.8
Goodwill, ending balance	921.7
Data Centers
Goodwill [Roll Forward]
Goodwill, beginning balance	2,978.4
Adjustments	(60.3)
Other	0
Effect of foreign currency translation	0
Goodwill, ending balance	2,918.1
Services
Goodwill [Roll Forward]
Goodwill, beginning balance	2
Adjustments	0
Other	0
Effect of foreign currency translation	0
Goodwill, ending balance	$ 2

GOODWILL AND OTHER INTANGIBLE_4

GOODWILL AND OTHER INTANGIBLE ASSETS - Other Intangible Assets Subject To Amortization (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 27,479.7	$ 28,133
Accumulated Amortization	(8,254.1)	(7,405.8)
Net Book Value	19,225.6	20,727.2
Acquired network location intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	6,172.4	6,294.6
Accumulated Amortization	(2,439)	(2,305.1)
Net Book Value	$ 3,733.4	3,989.5
Acquired network location intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives (years)	20 years
Acquired tenant-related intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 19,572.1	20,030.5
Accumulated Amortization	(5,526)	(5,051.5)
Net Book Value	$ 14,046.1	14,979
Acquired tenant-related intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives (years)	20 years
Acquired licenses and other intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 1,735.2	1,807.9
Accumulated Amortization	(289.1)	(49.2)
Net Book Value	$ 1,446.1	$ 1,758.7
Acquired licenses and other intangibles | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives (years)	2 years
Acquired licenses and other intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives (years)	20 years

GOODWILL AND OTHER INTANGIBLE_5

GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 460.9	$ 274.8	$ 919.5	$ 528.2
Weighted Average
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, remaining amortization period			15 years

GOODWILL AND OTHER INTANGIBLE_6

GOODWILL AND OTHER INTANGIBLE ASSETS - Expected Future Amortization Expenses (Details) $ in Millions	Jun. 30, 2022 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2022	$ 893.5
2023	1,612.2
2024	1,383.4
2025	1,352.7
2026	1,317.5
2027	$ 1,314.9

ACCRUED EXPENSES (Details)

ACCRUED EXPENSES (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Accrued Liabilities, Current [Abstract]
Accrued construction costs	$ 129.2	$ 197.3
Accrued income tax payable	19.8	84.8
Accrued pass-through costs	137.9	91
Amounts payable for acquisitions	85.4	95.2
Amounts payable to tenants	87.2	81.1
Accrued property and real estate taxes	281.7	255.3
Accrued rent	79	78.8
Payroll and related withholdings	98.3	124.7
Other accrued expenses	343.7	404.6
Total accrued expenses	$ 1,262.2	$ 1,412.8

LONG-TERM OBLIGATIONS - Schedul

LONG-TERM OBLIGATIONS - Schedule of Long-Term Debt Obligations (Details) € in Millions, $ in Millions	Jun. 30, 2022 USD ($)	Jun. 30, 2022 EUR (€)	Apr. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Finance lease obligations	$ 30.3			$ 31.6
Total	40,844			43,254.2
Less current portion of long-term obligations	(3,603.9)			(4,568.7)
Long-term obligations	37,240.1			38,685.5
American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	38,490.1			39,943.3
American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	2,323.6			3,279.3
CoreSite Realty Corporation | American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	0			955.1
2021 Multicurrency Credit Facility | Revolving Credit Facility | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	4,545.5			4,388.4
2021 Term Loan | Unsecured debt | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	995.8			995.4
2021 Credit Facility | Revolving Credit Facility | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	2,065			1,410
2021 EUR Three Year Delayed Draw Term Loan | Unsecured debt | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	864.4	€ 825		937.6
2021 USD 364-Day Delayed Draw Term Loan | Unsecured debt | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	599.3			2,998.5
2021 USD Two Year Delayed Draw Term Loan | Unsecured debt | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	$ 1,498.8			1,498.4
2.250% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.25%	2.25%
Long-term debt	$ 0			600.3
3.50% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.50%	3.50%
Long-term debt	$ 998.9			997.9
3.000% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3%	3%
Long-term debt	$ 695.1			709.9
0.600% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	0.60%	0.60%
Long-term debt	$ 498.4			497.9
5.00% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	5%	5%
Long-term debt	$ 1,000.7			1,000.9
3.375% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.375%	3.375%
Long-term debt	$ 647.6			647
2.950% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.95%	2.95%
Long-term debt	$ 645.5			644.7
2.400% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.40%	2.40%
Long-term debt	$ 746.7			746.1
1.375% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.375%	1.375%
Long-term debt	$ 520.3			563.8
4.000% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	4%	4%
Long-term debt	$ 746.1			745.5
1.300% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.30%	1.30%
Long-term debt	$ 496.8			496.4
4.400% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	4.40%	4.40%
Long-term debt	$ 497.9			497.6
1.600% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.60%	1.60%
Long-term debt	$ 695.7			695.2
1.950% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.95%	1.95%
Long-term debt	$ 520.6			564.3
1.450% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.45%	1.45%
Long-term debt	$ 593.7			593
3.375% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.375%	3.375%
Long-term debt	$ 992			991.2
3.125% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.125%	3.125%
Long-term debt	$ 398.4			398.3
2.750% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.75%	2.75%
Long-term debt	$ 745.6			745.2
0.450% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	0.45%	0.45%
Long-term debt	$ 781			847.1
0.400% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	0.40%	0.40%
Long-term debt	$ 518.7			562.5
3.650% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.65%	3.65%
Long-term debt	$ 642.4		$ 650	0
3.55% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.55%	3.55%
Long-term debt	$ 745.9			745.5
3.600% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.60%	3.60%
Long-term debt	$ 694.7			694.3
0.500% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	0.50%	0.50%
Long-term debt	$ 779.2			845.3
1.500% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.50%	1.50%
Long-term debt	$ 646.1			645.8
3.950% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.95%	3.95%
Long-term debt	$ 592.1			591.6
0.875% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	0.875%	0.875%
Long-term debt	$ 780.9			847.3
3.800% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.80%	3.80%
Long-term debt	$ 1,636			1,635.1
2.900% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.90%	2.90%
Long-term debt	$ 743			742.5
2.100% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.10%	2.10%
Long-term debt	$ 741.7			741.2
0.950% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	0.95%	0.95%
Long-term debt	$ 517			561
1.875% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.875%	1.875%
Long-term debt	$ 791.9			791.4
2.700% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.70%	2.70%
Long-term debt	$ 694			693.7
2.300% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.30%	2.30%
Long-term debt	$ 691.4			691
1.000% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1%	1%
Long-term debt	$ 674.3			731.7
4.050% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	4.05%	4.05%
Long-term debt	$ 641.8		$ 650	0
1.250% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.25%	1.25%
Long-term debt	$ 517.1			561.2
3.700% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.70%	3.70%
Long-term debt	$ 592.2			592.1
3.100% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.10%	3.10%
Long-term debt	$ 1,038.1			1,038
2.950% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.95%	2.95%
Long-term debt	$ 1,021.8			1,021.5
Series 2013-2A securities | Secured debt | American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	1,298.9			1,298.2
Series 2018-1A securities | Secured debt | American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	495.7			495.3
Series 2015-2 notes | Secured debt | American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	523.1			522.7
Other subsidiary debt | Unsecured debt | American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	$ 5.9			$ 8

LONG-TERM OBLIGATIONS - Current

LONG-TERM OBLIGATIONS - Current Portion of Long-Term Obligations (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Current portion of long-term obligations	$ 3,603.9	$ 4,568.7
2021 USD 364-Day Delayed Draw Term Loan | Unsecured debt
Debt Instrument [Line Items]
Debt instrument term	364 days
American Tower Corporation | 2021 USD 364-Day Delayed Draw Term Loan | Unsecured debt
Debt Instrument [Line Items]
Current portion of long-term obligations	$ 600
Debt instrument term	364 days
American Tower Corporation | 3.50% senior notes | Senior notes
Debt Instrument [Line Items]
Current portion of long-term obligations	$ 1,000
Debt interest rate	3.50%
American Tower Corporation | 3.000% senior notes | Senior notes
Debt Instrument [Line Items]
Current portion of long-term obligations	$ 700
Debt interest rate	3%
American Tower subsidiary | Series 2013-2A securities | Secured debt
Debt Instrument [Line Items]
Current portion of long-term obligations	$ 1,300

LONG-TERM OBLIGATIONS - Repayme

LONG-TERM OBLIGATIONS - Repayment of Debt (Details) - USD ($) $ in Millions	Jun. 30, 2022	Jan. 14, 2022	Jan. 07, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Accrued and unpaid interest	$ 236.6			$ 254.7
American Tower Corporation | 2.250% senior notes | Senior notes
Debt Instrument [Line Items]
Redemption price		$ 600
Contractual Interest Rate	2.25%
CoreSite Realty Corporation
Debt Instrument [Line Items]
Redemption price			$ 962.9
Prepayment consideration			80.1
Accrued and unpaid interest			$ 7.8

LONG-TERM OBLIGATIONS - Offerin

LONG-TERM OBLIGATIONS - Offering of Senior Notes (Details) - USD ($) $ in Millions		6 Months Ended
	Apr. 01, 2022	Jun. 30, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Proceeds from term loans		$ 0	$ 2,347
Senior notes
Debt Instrument [Line Items]
Redemption price percentage	100%	101%
Unsecured debt | 2021 USD 364-Day Delayed Draw Term Loan
Debt Instrument [Line Items]
Debt instrument term		364 days
American Tower Corporation | Senior notes
Debt Instrument [Line Items]
Proceeds from term loans	$ 1,282.6
American Tower Corporation | Senior notes | 3.650% senior notes
Debt Instrument [Line Items]
Contractual Interest Rate		3.65%
Debt face amount	650
American Tower Corporation | Senior notes | 4.050% senior notes
Debt Instrument [Line Items]
Contractual Interest Rate		4.05%
Debt face amount	$ 650
American Tower Corporation | Unsecured debt | 2021 USD 364-Day Delayed Draw Term Loan
Debt Instrument [Line Items]
Debt instrument term		364 days

LONG-TERM OBLIGATIONS - Sched_2

LONG-TERM OBLIGATIONS - Schedule of Key Terms of Notes (Details) - USD ($) $ in Millions		6 Months Ended
	Apr. 01, 2022	Jun. 30, 2022	Dec. 31, 2021
Senior notes
Debt Instrument [Line Items]
Redemption price percentage	100%	101%
American Tower Corporation
Debt Instrument [Line Items]
Long-term debt		$ 38,490.1	$ 39,943.3
American Tower Corporation | Senior notes | 3.650% senior notes
Debt Instrument [Line Items]
Long-term debt	$ 650	$ 642.4	0
Contractual Interest Rate		3.65%
American Tower Corporation | Senior notes | 4.050% senior notes
Debt Instrument [Line Items]
Long-term debt	$ 650	$ 641.8	$ 0
Contractual Interest Rate		4.05%

LONG-TERM OBLIGATIONS - Bank Fa

LONG-TERM OBLIGATIONS - Bank Facilities (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 10, 2022	Apr. 06, 2022	Apr. 01, 2022	Jan. 14, 2022	Dec. 31, 2021
Line of Credit Facility [Line Items]
Borrowings under credit facilities	$ 2,900	$ 6,511.8
2021 USD 364-Day Delayed Draw Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Debt instrument term	364 days
Revolving Credit Facility | 2021 Multicurrency Credit Facility
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity	$ 6,000
Revolving Credit Facility | 2021 Credit Facility
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity	4,000
American Tower Corporation
Line of Credit Facility [Line Items]
Long-term debt	$ 38,490.1						$ 39,943.3
American Tower Corporation | 2.250% senior notes | Senior notes
Line of Credit Facility [Line Items]
Contractual Interest Rate	2.25%
Redemption price						$ 600
Long-term debt	$ 0						600.3
American Tower Corporation | 2021 USD 364-Day Delayed Draw Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Debt instrument term	364 days
Redemption price			$ 2,300	$ 100
Long-term debt	$ 599.3						2,998.5
American Tower Corporation | 3.650% senior notes | Senior notes
Line of Credit Facility [Line Items]
Contractual Interest Rate	3.65%
Long-term debt	$ 642.4				$ 650		0
American Tower Corporation | 4.050% senior notes | Senior notes
Line of Credit Facility [Line Items]
Contractual Interest Rate	4.05%
Long-term debt	$ 641.8				$ 650		0
American Tower Corporation | Revolving Credit Facility | 2021 Multicurrency Credit Facility
Line of Credit Facility [Line Items]
Borrowings under credit facilities	850
Repayment of indebtedness under credit facility	600
Long-term debt	4,545.5						4,388.4
American Tower Corporation | Revolving Credit Facility | 2021 Credit Facility
Line of Credit Facility [Line Items]
Borrowings under credit facilities	2,100
Repayment of indebtedness under credit facility	1,400
Long-term debt	$ 2,065						$ 1,410

LONG-TERM OBLIGATIONS - Sched_3

LONG-TERM OBLIGATIONS - Schedule of Credit Facilities And Term Loans (Details) € in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($) renewalPeriod	Jun. 30, 2022 EUR (€)	Dec. 31, 2021 USD ($)
2021 EUR Three Year Delayed Draw Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Debt instrument term	3 years
2021 USD 364-Day Delayed Draw Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Debt instrument term	364 days
2021 USD Two Year Delayed Draw Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Debt instrument term	2 years
American Tower Corporation
Line of Credit Facility [Line Items]
Long-term debt	$ 38,490.1		$ 39,943.3
American Tower Corporation | Revolving Credit Facility
Line of Credit Facility [Line Items]
Number of optional renewal periods | renewalPeriod	2
American Tower Corporation | 2021 Multicurrency Credit Facility | Revolving Credit Facility
Line of Credit Facility [Line Items]
Long-term debt	$ 4,545.5		4,388.4
Debt outstanding	4,545.5
Undrawn letters of credit	$ 3.5
Current commitment fee, percentage	0.11%
American Tower Corporation | 2021 Multicurrency Credit Facility | Revolving Credit Facility | Current margin over LIBOR
Line of Credit Facility [Line Items]
Current margin over LIBOR or EURIBOR	1.125%
American Tower Corporation | 2021 Credit Facility | Revolving Credit Facility
Line of Credit Facility [Line Items]
Long-term debt	$ 2,065		1,410
Debt outstanding	2,065
Undrawn letters of credit	$ 24.2
Current commitment fee, percentage	0.11%
American Tower Corporation | 2021 Credit Facility | Revolving Credit Facility | Current margin over LIBOR
Line of Credit Facility [Line Items]
Current margin over LIBOR or EURIBOR	1.125%
American Tower Corporation | 2021 Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Long-term debt	$ 995.8		995.4
Debt outstanding	$ 1,000
American Tower Corporation | 2021 Term Loan | Unsecured debt | Current margin over LIBOR
Line of Credit Facility [Line Items]
Current margin over LIBOR or EURIBOR	1.125%
American Tower Corporation | 2021 EUR Three Year Delayed Draw Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Long-term debt	$ 864.4	€ 825	937.6
Debt outstanding	$ 864.9
American Tower Corporation | 2021 EUR Three Year Delayed Draw Term Loan | Unsecured debt | Current margin over LIBOR
Line of Credit Facility [Line Items]
Current margin over LIBOR or EURIBOR	1.125%
American Tower Corporation | 2021 USD 364-Day Delayed Draw Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Long-term debt	$ 599.3		2,998.5
Debt instrument term	364 days
Debt outstanding	$ 600
American Tower Corporation | 2021 USD 364-Day Delayed Draw Term Loan | Unsecured debt | Current margin over LIBOR
Line of Credit Facility [Line Items]
Current margin over LIBOR or EURIBOR	1.125%
American Tower Corporation | 2021 USD Two Year Delayed Draw Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Long-term debt	$ 1,498.8		$ 1,498.4
Debt outstanding	$ 1,500
American Tower Corporation | 2021 USD Two Year Delayed Draw Term Loan | Unsecured debt | Current margin over LIBOR
Line of Credit Facility [Line Items]
Current margin over LIBOR or EURIBOR	1.125%

FAIR VALUE MEASUREMENTS - Asset

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, 2022	Jun. 30, 2022	Dec. 31, 2021
Liabilities:
Unrealized gains (losses) for equity securities	$ 17.3	$ 7.8
Fair Value, Measurements, Recurring | Level 1
Assets:
Investments in equity securities	29.3	29.3	$ 37.1
Fair Value, Measurements, Recurring | Level 1 | Interest Rate Swap
Assets:
Interest rate swap agreements	0	0	0
Liabilities:
Interest rate swap agreements	0	0	0
Fair value of debt related to interest rate swap agreements	(3.6)	(3.6)	12.2
Fair Value, Measurements, Recurring | Level 2
Assets:
Investments in equity securities	0	0	0
Fair Value, Measurements, Recurring | Level 2 | Interest Rate Swap
Assets:
Interest rate swap agreements	0	0	11
Liabilities:
Interest rate swap agreements	4.7	4.7	0
Fair value of debt related to interest rate swap agreements	0	0	0
Fair Value, Measurements, Recurring | Level 3
Assets:
Investments in equity securities	0	0	0
Fair Value, Measurements, Recurring | Level 3 | Interest Rate Swap
Assets:
Interest rate swap agreements	0	0	0
Liabilities:
Interest rate swap agreements	0	0	0
Fair value of debt related to interest rate swap agreements	$ 0	$ 0	$ 0

FAIR VALUE MEASUREMENTS - Narra

FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term obligations	$ 40,844,000,000	$ 43,254,200,000
Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	37,700,000,000	44,100,000,000
Estimate of Fair Value Measurement | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	24,800,000,000	28,500,000,000
Estimate of Fair Value Measurement | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	$ 12,900,000,000	$ 15,600,000,000
American Tower Corporation | 2.250% senior notes | Senior notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contractual Interest Rate	2.25%
Interest rate swap agreements	$ 0

INCOME TAXES - Narrative (Detai

INCOME TAXES - Narrative (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Income Tax Contingency [Line Items]
Reversal of valuation allowances	$ 42,500,000	$ 79,700,000
Unrecognized tax benefits that would impact the ETR	102,700,000	102,700,000	$ 94,800,000
Unrecognized tax benefits, increase resulting from current period tax positions	7,900,000	9,600,000
Unrecognized tax benefits, decrease due to foreign currency translation	4,900,000	2,400,000
Unrecognized tax benefits, income tax penalties and interest accrued	54,500,000	54,500,000	$ 42,300,000
Minimum
Income Tax Contingency [Line Items]
Decrease in unrecognized tax benefits is reasonably possible	0	0
Maximum
Income Tax Contingency [Line Items]
Decrease in unrecognized tax benefits is reasonably possible	$ 20,700,000	$ 20,700,000

INCOME TAXES - Schedule of Pena

INCOME TAXES - Schedule of Penalties and Income Tax Related Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Penalties and income tax-related interest expense	$ 4.2	$ 29.8	$ 11.5	$ 33.5
Increase to penalties and income tax-related interest expense due to reclassifications		$ 16.6		$ 16.6

STOCK-BASED COMPENSATION - Narr

STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Discount from market price			15%
Unrecognized compensation expense	$ 0		$ 0
Stock-based compensation expense	42,200,000	$ 31,900,000	$ 98,900,000	$ 69,900,000
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected weighted average recognition period			2 years
Units granted (in shares)			702,278
RSUs | CoreSite Realty Corporation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	13,000,000		$ 13,000,000
Expected weighted average recognition period			1 year
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years		3 years	3 years
Unrecognized compensation expense	17,000,000		$ 17,000,000
Expected weighted average recognition period			2 years
Units granted (in shares)			98,542
Stock-based compensation expense	$ 10,000,000		$ 18,300,000
Performance Shares | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of potential target shares			0%
Performance Shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of potential target shares			200%
2007 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issuable under stock incentive plan (in shares)	5,100,000		5,100,000
2007 Plan | Certain Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issuable under stock incentive plan (in shares)	1,400,000		1,400,000
2007 Plan | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Unrecognized compensation expense	$ 233,700,000		$ 233,700,000
2007 Plan | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
2007 Plan | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period			10 years
2022 PSUs | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Units granted (in shares)			98,542
2021 PSUs | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Units granted (in shares)					98,694
2020 PSUs | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Units granted (in shares)						110,925

STOCK-BASED COMPENSATION - Summ

STOCK-BASED COMPENSATION - Summary Of Stock-based Compensation Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Share-Based Payment Arrangement [Abstract]
Stock-based compensation expense	$ 42.2	$ 31.9	$ 98.9	$ 69.9

STOCK-BASED COMPENSATION - Su_2

STOCK-BASED COMPENSATION - Summary Of The Company's Option Activity (Details)	6 Months Ended
	Jun. 30, 2022 shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding at beginning of period (in shares)	1,067,999
Options exercised (in shares)	(143,456)
Options forfeited (in shares)	0
Options expired (in shares)	0
Options outstanding at end of period (in shares)	924,543

STOCK-BASED COMPENSATION - Su_3

STOCK-BASED COMPENSATION - Summary Of Restricted Stock Activity (Details) - shares	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021	Dec. 31, 2020
RSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Units outstanding at beginning of period (in shares)	1,298,178
Units granted (in shares)	702,278
Units vested and released (in shares)	(533,157)
Units forfeited (in shares)	(43,181)
Units outstanding at end of period (in shares)	1,424,118	1,298,178
Units outstanding (in shares)	1,424,118	1,298,178
Units granted (in shares)	702,278
Units previously vested and deferred (in shares)	17,121
RSUs | CoreSite Realty Corporation
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Units outstanding at beginning of period (in shares)	125,841
Units outstanding at end of period (in shares)		125,841
Units outstanding (in shares)		125,841
PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Units outstanding at beginning of period (in shares)	267,621
Units granted (in shares)	98,542
Units vested and released (in shares)	(98,188)
Units forfeited (in shares)	0		(40,186)
Units outstanding at end of period (in shares)	267,975	267,621
Units outstanding (in shares)	267,975	267,621
Vesting period	3 years	3 years	3 years
Units granted (in shares)	98,542
PSUs | 2021 PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Units granted (in shares)		98,694
Units outstanding at end of period (in shares)	98,694
Units outstanding (in shares)	98,694
Vesting period	3 years
Units granted (in shares)		98,694
PSUs | 2020 PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Units granted (in shares)			110,925
Units outstanding at end of period (in shares)	70,739
Units outstanding (in shares)	70,739
Vesting period	3 years
Units granted (in shares)			110,925
PSUs | 2019 PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Units outstanding at end of period (in shares)	98,188
Units outstanding (in shares)	98,188
Vesting period	3 years
PSUs | 2022 PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Units granted (in shares)	98,542
Vesting period	3 years
Units granted (in shares)	98,542

EQUITY - Narrative (Details)

EQUITY - Narrative (Details) - USD ($)		1 Months Ended	6 Months Ended
	Jun. 07, 2022	Aug. 31, 2020	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2017	Mar. 31, 2011
Class of Stock [Line Items]
Proceeds from stock options and employee stock purchase plan			$ 19,800,000
Stock offering, value (up to)		$ 1,000,000,000
Common stock, par value (in usd per share)	$ 0.01		$ 0.01		$ 0.01
Price per share (in usd per share)	$ 256
Accrued dividend RSU			$ 11,200,000
Paid dividend RSU			$ 6,800,000	$ 7,300,000
2021 USD 364-Day Delayed Draw Term Loan | Unsecured debt
Class of Stock [Line Items]
Debt instrument term			364 days
Public Stock Offering
Class of Stock [Line Items]
Stock offerings (in shares)	9,185,000
Proceeds from sale of stock	$ 2,300,000,000
2020 ATM Program
Class of Stock [Line Items]
Stock offerings (in shares)			0
2011 Buyback
Class of Stock [Line Items]
Stock repurchase program, authorized amount							$ 1,500,000,000
Treasury stock activity (in shares)			14,361,283
Treasury stock repurchased			$ 1,500,000,000
2017 Buyback
Class of Stock [Line Items]
Stock repurchase program, authorized amount						$ 2,000,000,000
Treasury stock activity (in shares)			0

EQUITY - Distributions Declared

EQUITY - Distributions Declared (Details) - USD ($) $ / shares in Units, $ in Millions

6 Months Ended

Jul. 08, 2022

May 18, 2022

Apr. 29, 2022

Mar. 10, 2022

Jan. 14, 2022

Dec. 15, 2021

Jul. 09, 2021

May 27, 2021

Apr. 29, 2021

Mar. 04, 2021

Feb. 02, 2021

Dec. 03, 2020

Jun. 30, 2022

Jun. 30, 2021

Dividends Payable [Line Items]

Aggregate Payment Amount on common stock

$ 1,280.1

$ 1,096.4

Common Stock | Dividends Declared And Paid

Dividends Payable [Line Items]

Distribution per share, common stock (in dollars per share)

$ 1.43

$ 1.40

$ 1.39

$ 1.27

$ 1.24

$ 1.21

Aggregate Payment Amount on common stock

$ 638.8

$ 633.5

$ 577.8

$ 551.5

$ 537.6

Common Stock | Dividends Declared And Paid | Subsequent Event

Dividends Payable [Line Items]

Aggregate Payment Amount on common stock

$ 665.8

NONCONTROLLING INTEREST - Narra

NONCONTROLLING INTEREST - Narrative (Details) € in Millions, ৳ in Millions, $ in Millions

1 Months Ended

2 Months Ended

3 Months Ended

6 Months Ended

Dec. 31, 2021 USD ($)

Dec. 31, 2021 EUR (€)

Sep. 30, 2021 USD ($)

Sep. 30, 2021 EUR (€)

Aug. 31, 2021 USD ($)

Aug. 31, 2021 BDT (৳)

Jun. 30, 2021 USD ($)

Jun. 30, 2021 EUR (€)

Mar. 31, 2021 USD ($)

Jun. 30, 2021

Jun. 30, 2021 USD ($)

Jun. 30, 2022 USD ($)

Jun. 30, 2021 USD ($)

Noncontrolling Interest [Line Items]

Adjustment to noncontrolling interest

$ 0

$ 0

KTBL Acquisition

Noncontrolling Interest [Line Items]

Percentage of interests acquired

51%

51%

Purchase price

$ 10.6

৳ 900

Additional Paid-in Capital

Noncontrolling Interest [Line Items]

Adjustment to noncontrolling interest

$ (648.4)

(648.4)

(648.4)

Noncontrolling Interests

Noncontrolling Interest [Line Items]

Adjustment to noncontrolling interest

601

601

$ 0

601

Accumulated Other Comprehensive Loss

Noncontrolling Interest [Line Items]

Adjustment to noncontrolling interest

47.4

$ 47.4

$ 47.4

Subsidiary Interest

Noncontrolling Interest [Line Items]

Payments to acquire noncontrolling interest

$ 6

Ownership percentage

100%

ATC Europe

Noncontrolling Interest [Line Items]

Payments to acquire noncontrolling interest

$ 214.9

€ 178

Ownership percentage

52%

Ownership percentage by noncontrolling owners

49%

49%

49%

49%

49%

Germany

Noncontrolling Interest [Line Items]

Ownership percentage by noncontrolling owners

13%

Spain

Noncontrolling Interest [Line Items]

Ownership percentage by noncontrolling owners

17%

AT Iberia C.V.

Noncontrolling Interest [Line Items]

Dividends declared

$ 15.9

€ 14

ATC Europe | France And Poland

Noncontrolling Interest [Line Items]

Ownership percentage

100%

ATC Europe | Germany

Noncontrolling Interest [Line Items]

Ownership percentage

87%

ATC Europe | Spain

Noncontrolling Interest [Line Items]

Ownership percentage

83%

CDPQ | ATC Europe

Noncontrolling Interest [Line Items]

Ownership interest acquired

30%

30%

Allianz | ATC Europe

Noncontrolling Interest [Line Items]

Ownership interest acquired

18%

18%

CDPQ & Allianz | ATC Europe

Noncontrolling Interest [Line Items]

Payments to acquire noncontrolling interest

$ 3,100

€ 2,600

Confidence Group | KTBL

Noncontrolling Interest [Line Items]

Ownership percentage by noncontrolling owners

49%

49%

NONCONTROLLING INTEREST - Sched

NONCONTROLLING INTEREST - Schedule of Changes in Noncontrolling Interest (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at beginning of period		$ 9,250.7	$ 4,338.9	$ 9,069.6	$ 4,568.4
Adjustment to noncontrolling interest due to reorganization			0		0
Redemption of noncontrolling interest					0
Net (loss) income attributable to noncontrolling interests		890.9	747.9	1,593.6	1,396.7
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax		(1,136.4)	122.3	(1,042)	(201.2)
Contributions from noncontrolling interest holders		48.4		48.4
Distributions to noncontrolling interest holders		(0.1)	(214.9)	(0.3)	(215.2)
Balance at end of period	$ 6,823.4	10,726.2	6,823.4	10,726.2	6,823.4
Noncontrolling Interests
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at beginning of period		3,887.7	455.5	3,988.4	474.9
Adjustment to noncontrolling interest due to reorganization	601		601	0	601
Redemption of noncontrolling interest				0	(1.7)
Net (loss) income attributable to noncontrolling interests		(7.3)	1.6	(16.3)	5.4
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax		(161.2)	11.1	(252.7)	(10.1)
Contributions from noncontrolling interest holders		48.4		48.4	0
Distributions to noncontrolling interest holders		(0.1)		(0.3)	(0.3)
Balance at end of period	$ 1,069.2	$ 3,767.5	$ 1,069.2	$ 3,767.5	$ 1,069.2

EARNINGS PER COMMON SHARE - Sch

EARNINGS PER COMMON SHARE - Schedule Of Earnings Per Basic And Diluted By Common Class (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net income attributable to American Tower Corporation common stockholders, basic	$ 898.2	$ 746.3	$ 1,609.9	$ 1,391.3
Basic weighted average common shares outstanding (in shares)	458,776	450,617	457,369	447,569
Dilutive securities (in shares)	1,043	1,737	1,195	1,821
Diluted weighted average common shares outstanding (in shares)	459,819	452,354	458,564	449,390
Basic net income attributable to American Tower Corporation common stockholders per common share (in dollars per share)	$ 1.96	$ 1.66	$ 3.52	$ 3.11
Diluted net income attributable to American Tower Corporation common stockholders per common share (in dollars per share)	$ 1.95	$ 1.65	$ 3.51	$ 3.10

EARNINGS PER COMMON SHARE - S_2

EARNINGS PER COMMON SHARE - Schedule Of Shares Excluded From Computation Of Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from dilutive effect (in shares)	89	3	114	1

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Details) ₨ in Millions, $ in Millions				6 Months Ended
	Dec. 05, 2016 USD ($)	Dec. 05, 2016 INR (₨)	Mar. 27, 2015 USD ($) communicationsSite renewalPeriod	Jun. 30, 2022 USD ($) communicationsSite renewalPeriod	Dec. 31, 2000 communicationsSite
INDIA
Loss Contingencies [Line Items]
Foreign income tax assessment	$ 69.8	₨ 4,750
Verizon Transaction
Loss Contingencies [Line Items]
Leased assets, number of communication sites | communicationsSite			11,250
Right to lease, weighted average term			28 years
Aggregate purchase option price for towers | $			$ 5,000
Customer lease, initial term			10 years
Successive terms to renew lease | renewalPeriod			8
Lease renewal term			5 years
AT&T Transaction
Loss Contingencies [Line Items]
Leased assets, number of communication sites | communicationsSite				400	2,000
Aggregate purchase option price for towers | $				$ 1,100
Successive terms to renew lease | renewalPeriod				5
Lease renewal term				5 years
Operating lease, term of contract				27 years

ACQUISITIONS - Schedule of Merg

ACQUISITIONS - Schedule of Merger and Acquisition Related Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Acquisition and merger related expenses	$ 3.5	$ 28.9	$ 9.2	$ 63.5
Integration costs	$ 14.8	$ 9.4	$ 24.8	$ 26

ACQUISITIONS - Narrative (Detai

ACQUISITIONS - Narrative (Details) $ / shares in Units, € in Millions, $ in Millions

1 Months Ended

3 Months Ended

6 Months Ended

Dec. 28, 2021 USD ($)

Aug. 02, 2021 USD ($) communicationSite

Aug. 02, 2021 EUR (€) communicationSite

Jan. 13, 2021 USD ($) communicationSite

Jan. 13, 2021 EUR (€) communicationSite

Nov. 28, 2019 USD ($) communicationSite

Nov. 28, 2019 EUR (€) communicationSite

Jun. 30, 2021 USD ($) communicationSite

Jun. 30, 2021 EUR (€) communicationSite

Jun. 30, 2022 USD ($) communicationSite

Jun. 30, 2022 EUR (€) communicationSite

Jun. 30, 2022 USD ($) communicationSite

Jun. 30, 2022 EUR (€) communicationSite

Jun. 30, 2021 USD ($) communicationSite

Jul. 28, 2022 communicationSite

Dec. 31, 2021 communicationSite

Nov. 14, 2021 market dataCenter $ / shares

Dec. 31, 2020 communicationSite

Business Acquisition [Line Items]

Payment received related to acquisition | $

$ 4.3

$ 4.4

Telxius Telecom S.A.

Business Acquisition [Line Items]

Number of sites acquired

31,000

31,000

Purchase price

$ 700

€ 600

$ 9,400

€ 7,700

Telxius Telecom S.A. | GERMANY

Business Acquisition [Line Items]

Number of sites acquired

4,000

4,000

Telxius Telecom S.A. | Telxius European Tower Division

Business Acquisition [Line Items]

Number of sites acquired

20,000

20,000

20,000

Purchase price

$ 7,700

€ 6,300

Telxius Telecom S.A. | Telxius Latin America Tower Division

Business Acquisition [Line Items]

Number of sites acquired

7,000

7,000

7,000

Purchase price

$ 1,100

€ 900

CoreSite Realty Corporation

Business Acquisition [Line Items]

Number of sites acquired | dataCenter

24

Purchase price | $

$ 10,400

Price per share of shares acquired (in dollars per share) | $ / shares

$ 170

CoreSite Realty Corporation | U.S.

Business Acquisition [Line Items]

Number of operating markets related to acquired sites | market

8

Other non-current liabilities | Telxius Telecom S.A.

Business Acquisition [Line Items]

Purchase price

259.7

€ 247.7

Spain Fiber Acquisition

Business Acquisition [Line Items]

Purchase price

$ 128.8

€ 120.1

Spain Fiber Acquisition | Accounts Payable, Current

Business Acquisition [Line Items]

Purchase price

$ 76.8

€ 73.2

2022 Other Acquisitions | Communication Sites

Business Acquisition [Line Items]

Purchase price | $

$ 85.4

Number of sites acquired

144

144

144

144

2022 Other Acquisitions | Accounts Payable, Current | Communication Sites

Business Acquisition [Line Items]

Purchase price | $

$ 3.3

Orange S.A. | Communication Sites

Business Acquisition [Line Items]

Number of sites acquired

2,000

2,000

96

96

96

96

1,197

1,197

Purchase, period to be paid over

5 years

5 years

Orange S.A. | Communication Sites | Subsequent Event

Business Acquisition [Line Items]

Number of sites acquired

84

Orange S.A. | Communication Sites | Minimum

Business Acquisition [Line Items]

Purchase price

$ 550.5

€ 500

Orange S.A. | Communication Sites | Maximum

Business Acquisition [Line Items]

Purchase price

$ 660.5

€ 600

ACQUISITIONS - Schedule of Allo

ACQUISITIONS - Schedule of Allocation of Purchase Price for Asset Acquisitions (Details) - USD ($) $ in Millions			6 Months Ended
	Jun. 30, 2022	Dec. 28, 2021	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Updated Allocation
GOODWILL	$ 12,969.5		$ 12,969.5	$ 13,350.1
Tenant-related intangible assets | Maximum
Updated Allocation
Estimated Useful Lives (years)			20 years
Network location intangible assets | Maximum
Updated Allocation
Estimated Useful Lives (years)			20 years
Telxius Telecom S.A.
Updated Allocation
Current assets	284.1		$ 284.1		$ 289
Property and equipment	1,323.6		1,323.6		1,417.7
Other non-current assets	1,454.3		1,454.3		1,380.3
Current liabilities	(345.2)		(345.2)		(331.9)
Deferred tax liability	(1,191.7)		(1,191.7)		(1,227.5)
Other non-current liabilities	(1,522.1)		(1,522.1)		(1,504.8)
Net assets acquired	6,059.3		6,059.3		6,089.8
GOODWILL	3,533		3,533		3,500
Fair value of net assets acquired	9,592.3		9,592.3		9,589.8
Purchase price	9,592.3		9,592.3		9,589.8
Telxius Telecom S.A. | Tenant-related intangible assets
Updated Allocation
Intangibles assets	5,381.8		5,381.8		5,391.2
Telxius Telecom S.A. | Network location intangible assets
Updated Allocation
Intangibles assets	674.5		674.5		675.8
Telxius Telecom S.A. | Other intangible assets
Updated Allocation
Intangibles assets	0		$ 0		$ 0
Telxius Telecom S.A. | Tenant-related and network location intangible assets
Updated Allocation
Estimated Useful Lives (years)			20 years
CoreSite Realty Corporation
Updated Allocation
Current assets	99.6	$ 99.8	$ 99.6
Property and equipment	5,289.5	5,129	5,289.5
Other non-current assets	330.1	332.9	330.1
Current liabilities	(153.6)	(156.6)	(153.6)
Deferred tax liability	0	0	0
Other non-current liabilities	(340.6)	(323.1)	(340.6)
Net assets acquired	7,516.3	7,456	7,516.3
GOODWILL	2,883	2,943.3	2,883
Fair value of net assets acquired	10,399.3	10,399.3	10,399.3
Debt assumed	(955.1)	(955.1)
Purchase price	9,444.2	9,444.2	9,444.2
CoreSite Realty Corporation | Tenant-related intangible assets
Updated Allocation
Intangibles assets	655	665	655
CoreSite Realty Corporation | Network location intangible assets
Updated Allocation
Intangibles assets	0	0	0
CoreSite Realty Corporation | Other intangible assets
Updated Allocation
Intangibles assets	1,636.3	$ 1,709	$ 1,636.3
CoreSite Realty Corporation | Other intangible assets | Minimum
Updated Allocation
Estimated Useful Lives (years)			2 years
CoreSite Realty Corporation | Other intangible assets | Maximum
Updated Allocation
Estimated Useful Lives (years)			10 years
CoreSite Realty Corporation | Tenant-related and network location intangible assets
Updated Allocation
Estimated Useful Lives (years)			20 years
Acquisitions 2022
Other
Current assets	27		$ 27
Property and equipment	54.6		54.6
Other non-current assets	16.3		16.3
Current liabilities	(0.6)		(0.6)
Deferred tax liability	0		0
Other non-current liabilities	(19.6)		(19.6)
Net assets acquired	214.2		214.2
Fair value of net assets acquired	214.2		214.2
Purchase price			214.2
Acquisitions 2022 | Tenant-related intangible assets
Other
Intangible assets	122.4		122.4
Acquisitions 2022 | Network location intangible assets
Other
Intangible assets	14.1		14.1
Acquisitions 2022 | Other intangible assets
Other
Intangible assets	$ 0		$ 0
Acquisitions 2022 | Tenant-related and network location intangible assets
Updated Allocation
Estimated Useful Lives (years)			20 years

ACQUISITIONS - Pro Forma Inform

ACQUISITIONS - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Pro forma revenues	$ 2,675.5	$ 2,604.9	$ 5,338.3	$ 5,109.1
Pro forma net income attributable to American Tower Corporation common stockholders	$ 898.4	$ 659.4	$ 1,610.1	$ 1,209.6
Pro forma net income per common share amounts:
Basic net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 1.93	$ 1.42	$ 3.46	$ 2.61
Diluted net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 1.93	$ 1.42	$ 3.45	$ 2.60

BUSINESS SEGMENTS - Narrative (

BUSINESS SEGMENTS - Narrative (Details) - 6 months ended Jun. 30, 2022	reportableSegment	segment
Segment Reporting [Abstract]
Number of reportable segments	7	5

BUSINESS SEGMENTS - Summarized

BUSINESS SEGMENTS - Summarized Segment Financial Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Segment revenues	$ 2,674.3	$ 2,298.9	$ 5,334.6	$ 4,457.4
Segment selling, general, administrative and development expense	222.9	207.2	516.8	389.8
OPERATING INCOME	782.3	849.2	1,507.4	1,677.9
Stock-based compensation expense	42.2	31.9	98.9	69.9
Depreciation, amortization and accretion			1,642.3	1,077.3
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	898.3	820.7	1,623.5	1,523.3
Total assets	68,116.8	58,982.9	68,116.8	58,982.9	$ 69,887.9
Selling, General and Administrative Expenses
Segment Reporting Information [Line Items]
Stock-based compensation expense	42.2	31.9	98.9	69.9
U.S. & Canada
Segment Reporting Information [Line Items]
Segment revenues	1,295.7	1,296.8	2,587.6	2,554.4
Asia-Pacific
Segment Reporting Information [Line Items]
Segment revenues	298	298.2	596.5	579.6
Africa
Segment Reporting Information [Line Items]
Segment revenues	285.5	248	553.3	483.7
Europe
Segment Reporting Information [Line Items]
Segment revenues	178.8	87.8	377.3	132.4
Latin America
Segment Reporting Information [Line Items]
Segment revenues	425.2	365.6	844.5	702.3
Data Centers
Segment Reporting Information [Line Items]
Segment revenues	191.1	2.5	375.4	5
Operating Segments
Segment Reporting Information [Line Items]
Segment revenues	2,674.3	2,298.9	5,334.6	4,457.4
Segment operating expenses	822.9	647.9	1,622.3	1,222.2
Segment gross margin	1,851.4	1,651	3,712.3	3,235.2
Segment selling, general, administrative and development expense	132.2	126	311.5	224.4
OPERATING INCOME	1,719.2	1,525	3,400.8	3,010.8
Operating Segments | Property
Segment Reporting Information [Line Items]
Segment revenues	2,614.5	2,233	5,215.3	4,362.7
Segment operating expenses	794	623.3	1,565.5	1,186.6
Segment gross margin	1,820.5	1,609.7	3,649.8	3,176.1
Segment selling, general, administrative and development expense	127.1	121.9	300.4	216.1
OPERATING INCOME	1,693.4	1,487.8	3,349.4	2,960
Total assets	67,493.9	58,388.9	67,493.9	58,388.9
Operating Segments | U.S. & Canada
Segment Reporting Information [Line Items]
Segment revenues	1,235.9	1,230.9	2,468.3	2,459.7
Segment operating expenses	212.6	210.8	412.4	407.8
Segment gross margin	1,023.3	1,020.1	2,055.9	2,051.9
Segment selling, general, administrative and development expense	43.5	41.1	86.3	79.4
OPERATING INCOME	979.8	979	1,969.6	1,972.5
Total assets	26,882.2	27,315.6	26,882.2	27,315.6
Operating Segments | Asia-Pacific
Segment Reporting Information [Line Items]
Segment revenues	298	298.2	596.5	579.6
Segment operating expenses	181.7	183.8	356.8	359.3
Segment gross margin	116.3	114.4	239.7	220.3
Segment selling, general, administrative and development expense	6.1	24.1	54	31.2
OPERATING INCOME	110.2	90.3	185.7	189.1
Total assets	4,972	5,140.8	4,972	5,140.8
Operating Segments | Africa
Segment Reporting Information [Line Items]
Segment revenues	285.5	248	553.3	483.7
Segment operating expenses	111.9	85.7	209.6	166.6
Segment gross margin	173.6	162.3	343.7	317.1
Segment selling, general, administrative and development expense	22	17.5	44.5	36.4
OPERATING INCOME	151.6	144.8	299.2	280.7
Total assets	4,752.8	5,031.5	4,752.8	5,031.5
Operating Segments | Europe
Segment Reporting Information [Line Items]
Segment revenues	178.8	87.8	377.3	132.4
Segment operating expenses	75.3	29.9	167.6	37.7
Segment gross margin	103.5	57.9	209.7	94.7
Segment selling, general, administrative and development expense	14.1	7.9	29	13.5
OPERATING INCOME	89.4	50	180.7	81.2
Total assets	11,259.4	11,566.7	11,259.4	11,566.7
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Segment revenues	425.2	365.6	844.5	702.3
Segment operating expenses	133.5	112.1	263.5	213.3
Segment gross margin	291.7	253.5	581	489
Segment selling, general, administrative and development expense	25.9	30	54.7	53.3
OPERATING INCOME	265.8	223.5	526.3	435.7
Total assets	8,736.9	9,240	8,736.9	9,240
Operating Segments | Data Centers
Segment Reporting Information [Line Items]
Segment revenues	191.1	2.5	375.4	5
Segment operating expenses	79	1	155.6	1.9
Segment gross margin	112.1	1.5	219.8	3.1
Segment selling, general, administrative and development expense	15.5	1.3	31.9	2.3
OPERATING INCOME	96.6	0.2	187.9	0.8
Total assets	10,890.6	94.3	10,890.6	94.3
Operating Segments | Services
Segment Reporting Information [Line Items]
Segment revenues	59.8	65.9	119.3	94.7
Segment operating expenses	28.9	24.6	56.8	35.6
Segment gross margin	30.9	41.3	62.5	59.1
Segment selling, general, administrative and development expense	5.1	4.1	11.1	8.3
OPERATING INCOME	25.8	37.2	51.4	50.8
Total assets	84.7	88.5	84.7	88.5
Other
Segment Reporting Information [Line Items]
Segment selling, general, administrative and development expense	48.5	49.3	106.4	95.5
Stock-based compensation expense	42.2	31.9	98.9	69.9
Depreciation, amortization and accretion	826.5	554.8	1,642.3	1,077.3
Other Income	(96.3)		(70.3)
Other expense		68.3		244.8
Total assets	$ 538.2	$ 505.5	$ 538.2	$ 505.5

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details) - Subsequent Event - Data Centers $ in Billions	1 Months Ended
	Jul. 28, 2022 USD ($)
Subsequent Event [Line Items]
Controlling ownership interest percentage	0.77
Forecast
Subsequent Event [Line Items]
Controlling ownership interest percentage	0.71
Stonepeak
Subsequent Event [Line Items]
Aggregate consideration paid to acquire noncontrolling ownership interest	$ 2.5
Convertible basis term	4 years
Stonepeak | Forecast
Subsequent Event [Line Items]
Equity method investment, ownership interest percentage	29%
Stonepeak | Common equity
Subsequent Event [Line Items]
Equity method investment, ownership interest percentage	23%
Stonepeak | Convertible preferred equity
Subsequent Event [Line Items]
Equity method investment, ownership interest percentage	100%