10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One):

☒ Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934. For the quarterly period ended September 30, 2022.

☐ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.

Commission File Number: 001-14195

AMERICAN TOWER CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	65-0723837
(State or other jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)

116 Huntington Avenue

Boston, Massachusetts 02116

(Address of principal executive offices)

Telephone Number (617) 375-7500

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each Class	Trading Symbol(s)	Name of exchange on which registered
Common Stock, $0.01 par value	AMT	New York Stock Exchange
1.375% Senior Notes due 2025	AMT 25A	New York Stock Exchange
1.950% Senior Notes due 2026	AMT 26B	New York Stock Exchange
0.450% Senior Notes due 2027	AMT 27C	New York Stock Exchange
0.400% Senior Notes due 2027	AMT 27D	New York Stock Exchange
0.500% Senior Notes due 2028	AMT 28A	New York Stock Exchange
0.875% Senior Notes due 2029	AMT 29B	New York Stock Exchange
0.950% Senior Notes due 2030	AMT 30C	New York Stock Exchange
1.000% Senior Notes due 2032	AMT 32	New York Stock Exchange
1.250% Senior Notes due 2033	AMT 33	New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days:    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.   ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act):    Yes  ☐    No  ☒

As of October 20, 2022, there were 465,605,603 shares of common stock outstanding.

AMERICAN TOWER CORPORATION

TABLE OF CONTENTS

QUARTERLY REPORT ON FORM 10-Q

FOR THE QUARTER ENDED SEPTEMBER 30, 2022

		Page Nos.
PART I. FINANCIAL INFORMATION
Item 1.	Unaudited Consolidated and Condensed Consolidated Financial Statements		1
	Consolidated Balance Sheets as of September 30, 2022 and December 31, 2021		1
	Consolidated Statements of Operations for the three and nine months ended September 30, 2022 and 2021		2
	Consolidated Statements of Comprehensive (Loss) Income for the three and nine months ended September 30, 2022 and 2021		3
	Consolidated Statements of Cash Flows for the nine months ended September 30, 2022 and 2021		4
	Consolidated Statements of Equity for the three and nine months ended September 30, 2022 and 2021		5
	Notes to Consolidated and Condensed Consolidated Financial Statements		7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		34
Item 3.	Quantitative and Qualitative Disclosures about Market Risk		59
Item 4.	Controls and Procedures		59
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings		61
Item 1A.	Risk Factors		61
Item 6.	Exhibits		63
Signatures			64

PART I. FINANCIAL INFORMATION

ITEM 1. UNAUDITED CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(in millions, except share count and per share data)

	September 30, 2022		December 31, 2021
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	2,121.8	$	1,949.9
Restricted cash	127.8		393.4
Accounts receivable, net	722.4		728.9
Prepaid and other current assets	787.0		657.2
Total current assets	3,759.0		3,729.4
PROPERTY AND EQUIPMENT, net	19,402.6		19,784.0
GOODWILL	12,686.2		13,350.1
OTHER INTANGIBLE ASSETS, net	18,320.3		20,727.2
DEFERRED TAX ASSET	116.4		131.6
DEFERRED RENT ASSET	2,878.0		2,539.6
RIGHT-OF-USE ASSET	8,857.5		9,225.1
NOTES RECEIVABLE AND OTHER NON-CURRENT ASSETS	492.8		400.9
TOTAL	$	66,512.8	$	69,887.9
LIABILITIES
CURRENT LIABILITIES:
Accounts payable	$	212.0	$	272.4
Accrued expenses	1,202.7		1,412.8
Distributions payable	697.1		642.1
Accrued interest	199.5		254.7
Current portion of operating lease liability	766.3		712.6
Current portion of long-term obligations	3,015.2		4,568.7
Unearned revenue	529.8		1,204.0
Total current liabilities	6,622.6		9,067.3
LONG-TERM OBLIGATIONS	35,313.9		38,685.5
OPERATING LEASE LIABILITY	7,566.4		8,041.8
ASSET RETIREMENT OBLIGATIONS	2,010.2		2,003.0
DEFERRED TAX LIABILITY	1,496.8		1,830.9
OTHER NON-CURRENT LIABILITIES	1,184.3		1,189.8
Total liabilities	54,194.2		60,818.3
COMMITMENTS AND CONTINGENCIES
EQUITY (shares in thousands):
Common stock: $.01 par value; 1,000,000 shares authorized; 476,517 and 466,687 shares issued; and 465,602 and 455,772 shares outstanding, respectively	4.8		4.7
Additional paid-in capital	14,646.9		12,240.2
Distributions in excess of earnings	(689.3)		(1,142.4)
Accumulated other comprehensive loss	(6,398.2)		(4,738.9)
Treasury stock (10,915 shares at cost)	(1,282.4)		(1,282.4)
Total American Tower Corporation equity	6,281.8		5,081.2
Noncontrolling interests	6,036.8		3,988.4
Total equity	12,318.6		9,069.6
TOTAL	$	66,512.8	$	69,887.9

See accompanying notes to unaudited consolidated and condensed consolidated financial statements.

1

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

(in millions, except share and per share data)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
REVENUES:
Property	$	2,609.9	$	2,368.9	$	7,825.2	$	6,731.6
Services	61.6		85.4		180.9		180.1
Total operating revenues	2,671.5		2,454.3		8,006.1		6,911.7
OPERATING EXPENSES:
Costs of operations (exclusive of items shown separately below):
Property	808.8		693.4		2,374.3		1,880.0
Services	27.7		30.9		84.5		66.5
Depreciation, amortization and accretion	898.1		611.4		2,540.4		1,688.7
Selling, general, administrative and development expense	231.2		205.9		748.0		595.7
Other operating expenses	52.8		85.2		98.6		175.4
Total operating expenses	2,018.6		1,626.8		5,845.8		4,406.3
OPERATING INCOME	652.9		827.5		2,160.3		2,505.4
OTHER INCOME (EXPENSE):
Interest income	18.8		9.4		43.0		28.4
Interest expense	(294.0)		(226.1)		(833.0)		(646.8)
Loss on retirement of long-term obligations	(0.4)		—		(0.4)		(25.7)
Other income (including foreign currency gains of $474.5, $180.5, $1,111.3 and $422.1, respectively)	478.5		166.8		1,109.4		439.6
Total other income (expense)	202.9		(49.9)		319.0		(204.5)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	855.8		777.6		2,479.3		2,300.9
Income tax provision	(36.1)		(51.4)		(66.0)		(174.5)
NET INCOME	819.7		726.2		2,413.3		2,126.4
Net loss (income) attributable to noncontrolling interests	20.0		(3.2)		36.3		(12.1)
NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS	$	839.7	$	723.0	$	2,449.6	$	2,114.3
NET INCOME PER COMMON SHARE AMOUNTS:
Basic net income attributable to American Tower Corporation common stockholders	$	1.80	$	1.59	$	5.32	$	4.70
Diluted net income attributable to American Tower Corporation common stockholders	$	1.80	$	1.58	$	5.31	$	4.68
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING (in thousands):
BASIC	465,594		455,224		460,141		450,148
DILUTED	466,801		456,977		461,360		451,981

See accompanying notes to unaudited consolidated and condensed consolidated financial statements.

2

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

(in millions)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Net income	$	819.7	$	726.2	$	2,413.3	$	2,126.4
Other comprehensive income (loss):
Changes in fair value of cash flow hedges, each net of tax expense of $0	—		—		—		(0.0)
Reclassification of unrealized losses on cash flow hedges to net income, each net of tax expense of $0	—		—		—		0.1
Foreign currency translation adjustments, net of tax (benefit) expense of $(0.8), $0.0, $(1.0) and $(0.0), respectively.	(1,075.9)		(622.0)		(2,117.9)		(826.9)
Other comprehensive (loss) income	(1,075.9)		(622.0)		(2,117.9)		(826.8)
Comprehensive (loss) income	(256.2)		104.2		295.4		1,299.6
Comprehensive loss (income) attributable to noncontrolling interests	225.9		89.7		494.9		94.6
Allocation of accumulated other comprehensive income resulting from purchases of noncontrolling interest and redeemable noncontrolling interests	—		—		—		47.5
Comprehensive (loss) income attributable to American Tower Corporation stockholders	$	(30.3)	$	193.9	$	790.3	$	1,441.7

See accompanying notes to unaudited consolidated and condensed consolidated financial statements.

3

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in millions)

	Nine Months Ended September 30,
	2022		2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	2,413.3	$	2,126.4
Adjustments to reconcile net income to cash provided by operating activities
Depreciation, amortization and accretion	2,540.4		1,688.7
Stock-based compensation expense	138.1		98.0
Loss on early retirement of long-term obligations	0.4		25.7
Other non-cash items reflected in statements of operations	(1,112.2)		(340.8)
Increase in net deferred rent balances	(350.4)		(324.3)
Right-of-use asset and Operating lease liability, net	0.6		13.9
Changes in unearned revenue	(710.9)		995.1
Increase in assets	(309.3)		(201.6)
(Decrease) increase in liabilities	(98.8)		59.9
Cash provided by operating activities	2,511.2		4,141.0
CASH FLOWS FROM INVESTING ACTIVITIES
Payments for purchase of property and equipment and construction activities	(1,215.4)		(916.7)
Payments for acquisitions, net of cash acquired	(359.1)		(9,595.3)
Proceeds from sale of short-term investments and other non-current assets	16.0		13.8
Payment for investments in equity securities	—		(25.0)
Deposits and other	52.3		(1.3)
Cash used for investing activities	(1,506.2)		(10,524.5)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from short-term borrowings, net	13.5		—
Borrowings under credit facilities	3,500.0		7,666.9
Proceeds from issuance of senior notes, net	1,293.6		5,609.4
Proceeds from term loans	—		2,347.0
Repayments of notes payable, credit facilities, senior notes, secured debt, term loans and finance leases	(8,595.7)		(10,752.8)
Distributions to noncontrolling interest holders	(3.2)		(223.1)
Contributions from noncontrolling interest holders	2,548.5		3,078.2
Proceeds from stock options and employee stock purchase plan	21.0		60.4
Distributions paid on common stock	(1,945.9)		(1,674.4)
Proceeds from the issuance of common stock, net	2,291.7		2,361.8
Payment for early retirement of long-term obligations	—		(61.9)
Deferred financing costs and other financing activities	(84.0)		(126.2)
Purchase of redeemable noncontrolling interest	—		(2.5)
Cash (used for) provided by financing activities	(960.5)		8,282.8
Net effect of changes in foreign currency exchange rates on cash and cash equivalents, and restricted cash	(138.2)		(61.4)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH	(93.7)		1,837.9
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	$	2,249.6	$	3,699.3
CASH PAID FOR INCOME TAXES (NET OF REFUNDS OF $7.1 AND $35.2, RESPECTIVELY)	$	244.5	$	121.1
CASH PAID FOR INTEREST	$	852.5	$	576.9
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Purchases of property and equipment under finance leases and perpetual easements	$	19.4	$	42.2
Decrease in accounts payable and accrued expenses for purchases of property and equipment and construction activities	$	(26.5)	$	(0.4)
Settlement of third-party debt	$	—	$	(9.0)

See accompanying notes to unaudited consolidated and condensed consolidated financial statements.

4

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF EQUITY

(in millions, share counts in thousands)

	Common Stock			Treasury Stock			Additional Paid-in Capital		Accumulated Other Comprehensive Loss		Distributions in Excess of Earnings		Noncontrolling Interests		Total Equity
Three Months Ended September 30, 2021 and 2022	Issued Shares	Amount		Shares	Amount
BALANCE, JULY 1, 2021	465,946	$	4.7	(10,915)	$	(1,282.4)	$	12,019.8	$	(3,902.9)	$	(1,085.0)	$	1,069.2	$	6,823.4
Stock-based compensation related activity	378	0.0		—	—		61.5		—		—		—		61.5
Foreign currency translation adjustment, net of tax	—	—		—	—		—		(529.1)		—		(93.2)		(622.3)
Contributions from noncontrolling interest holders	—	—		—	—		—		—		—		3,078.2		3,078.2
Distributions to noncontrolling interest holders	—	—		—	—		—		—		—		(0.1)		(0.1)
Purchase of redeemable noncontrolling interest	—	—		—	—		—		—		—		10.2		10.2
Common stock distributions declared	—	—		—	—		—		—		(598.4)		—		(598.4)
Net income	—	—		—	—		—		—		723.0		1.5		724.5
BALANCE, SEPTEMBER 30, 2021	466,324	$	4.7	(10,915)	$	(1,282.4)	$	12,081.3	$	(4,432.0)	$	(960.4)	$	4,065.8	$	9,477.0
BALANCE, JULY 1, 2022	476,500	$	4.8	(10,915)	$	(1,282.4)	$	14,606.8	$	(5,528.2)	$	(842.3)	$	3,767.5	$	10,726.2
Stock-based compensation related activity	17	0.0		—	—		40.1		—		—		—		40.1
Foreign currency translation adjustment, net of tax	—	—		—	—		—		(870.0)		—		(205.9)		(1,075.9)
Contributions from noncontrolling interest holders	—	—		—	—		—		—		—		2,504.2		2,504.2
Distributions to noncontrolling interest holders	—	—		—	—		—		—		—		(9.0)		(9.0)
Common stock distributions declared	—	—		—	—		—		—		(686.7)		—		(686.7)
Net income (loss)	—	—		—	—		—		—		839.7		(20.0)		819.7
BALANCE, SEPTEMBER 30, 2022	476,517	$	4.8	(10,915)	$	(1,282.4)	$	14,646.9	$	(6,398.2)	$	(689.3)	$	6,036.8	$	12,318.6

5

	Common Stock			Treasury Stock			Additional Paid-in Capital		Accumulated Other Comprehensive Loss		Distributions in Excess of Earnings		Noncontrolling Interests		Total Equity
Nine Months Ended September 30, 2021 and 2022	Issued Shares	Amount		Shares	Amount
BALANCE, JANUARY 1, 2021	455,245	$	4.6	(10,915)	$	(1,282.4)	$	10,473.7	$	(3,759.4)	$	(1,343.0)	$	474.9	$	4,568.4
Stock-based compensation related activity	1,115	0.0		—	—		99.9		—		—		—		99.9
Issuance of common stock- stock purchase plan	38	0.0		—	—		7.7		—		—		—		7.7
Issuance of common stock	9,900	0.1		—	—		2,361.7		—		—		—		2,361.8
Changes in fair value of cash flow hedges, net of tax	—	—		—	—		—		(0.0)		—		—		(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	—	—		—	—		—		(720.2)		—		(103.3)		(823.5)
Adjustment to noncontrolling interest	—	—		—	—		(648.4)		47.4		—		601.0		—
Contributions from noncontrolling interest holders	—	—		—	—		—		—		—		3,078.2		3,078.2
Distributions to noncontrolling interest holders	—	—		—	—		(214.9)		—		—		(0.4)		(215.3)
Redemption of noncontrolling interest	26	0.0		—	—		1.7		—		—		(1.7)		—
Purchase of redeemable noncontrolling interest	—	—		—	—		(0.1)		0.1		—		—		—
Purchase of noncontrolling interest	—	—		—	—		—		—		—		10.2		10.2
Common stock distributions declared	—	—		—	—		—		—		(1,731.7)		—		(1,731.7)
Net income	—	—		—	—		—		—		2,114.3		6.9		2,121.2
BALANCE, SEPTEMBER 30, 2021	466,324	$	4.7	(10,915)	$	(1,282.4)	$	12,081.3	$	(4,432.0)	$	(960.4)	$	4,065.8	$	9,477.0
BALANCE, JANUARY 1, 2022	466,687	$	4.7	(10,915)	$	(1,282.4)	$	12,240.2	$	(4,738.9)	$	(1,142.4)	$	3,988.4	$	9,069.6
Stock-based compensation related activity	607	0.0		—	—		106.8		—		—		—		106.8
Issuance of common stock- stock purchase plan	38	0.0		—	—		8.3		—		—		—		8.3
Issuance of common stock	9,185	0.1		—	—		2,291.6		—		—		—		2,291.7
Foreign currency translation adjustment, net of tax	—	—		—	—		—		(1,659.3)		—		(458.6)		(2,117.9)
Contributions from noncontrolling interest holders	—	—		—	—		—		—		—		2,552.6		2,552.6
Distributions to noncontrolling interest holders	—	—		—	—		—		—		—		(9.3)		(9.3)
Common stock distributions declared	—	—		—	—		—		—		(1,996.5)		—		(1,996.5)
Net income (loss)	—	—		—	—		—		—		2,449.6		(36.3)		2,413.3
BALANCE, SEPTEMBER 30, 2022	476,517	$	4.8	(10,915)	$	(1,282.4)	$	14,646.9	$	(6,398.2)	$	(689.3)	$	6,036.8	$	12,318.6

See accompanying notes to unaudited consolidated and condensed consolidated financial statements.

6

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

1.    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 nine months ended September 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 September 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), (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) and (iii) a common equity interest of approximately 77% in the Company’s U.S. data center business (Stonepeak (as defined and further discussed in note 11) holds approximately 23% of the outstanding common equity and 100% of the outstanding mandatorily convertible preferred equity). As of September 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 nine months ended September 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 nine months ended September 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:

	Nine Months Ended September 30,
	2022		2021
Cash and cash equivalents	$	2,121.8	$	3,277.2
Restricted cash	127.8		422.1
Total cash, cash equivalents and restricted cash	$	2,249.6	$	3,699.3

Restricted cash as of September 30, 2021 includes 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 the space in its data center facilities (the “lease component”) and from the reimbursement of costs incurred by the Company in operating the communications sites and data center facilities and supporting its

7

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

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 nine months ended September 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 September 30, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers (1)		Total
Non-lease property revenue	$	74.3	$	4.1	$	6.5	$	8.3	$	39.0	$	26.8	$	159.0
Services revenue	61.6		—		—		—		—		—		61.6
Total non-lease revenue	$	135.9	$	4.1	$	6.5	$	8.3	$	39.0	$	26.8	$	220.6
Property lease revenue	1,184.9		245.1		296.9		175.7		381.4		166.9		2,450.9
Total revenue	$	1,320.8	$	249.2	$	303.4	$	184.0	$	420.4	$	193.7	$	2,671.5

Three Months Ended September 30, 2021	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers (1)		Total
Non-lease property revenue	$	73.2	$	2.6	$	6.3	$	2.1	$	35.1	$	—	$	119.3
Services revenue	85.4		—		—		—		—		—		85.4
Total non-lease revenue	$	158.6	$	2.6	$	6.3	$	2.1	$	35.1	$	—	$	204.7
Property lease revenue	1,155.3		310.9		251.1		173.7		355.9		2.7		2,249.6
Total revenue	$	1,313.9	$	313.5	$	257.4	$	175.8	$	391.0	$	2.7	$	2,454.3

Nine Months Ended September 30, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers (1)		Total
Non-lease property revenue	$	222.3	$	12.0	$	20.7	$	17.5	$	114.9	$	78.6	$	466.0
Services revenue	180.9		—		—		—		—		—		180.9
Total non-lease revenue	$	403.2	$	12.0	$	20.7	$	17.5	$	114.9	$	78.6	$	646.9
Property lease revenue	3,505.2		833.7		836.0		543.8		1,150.0		490.5		7,359.2
Total revenue	$	3,908.4	$	845.7	$	856.7	$	561.3	$	1,264.9	$	569.1	$	8,006.1

8

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

Nine Months Ended September 30, 2021	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers (1)		Total
Non-lease property revenue	$	214.9	$	6.8	$	17.5	$	6.0	$	100.9	$	—	$	346.1
Services revenue	180.1		—		—		—		—		—		180.1
Total non-lease revenue	$	395.0	$	6.8	$	17.5	$	6.0	$	100.9	$	—	$	526.2
Property lease revenue	3,473.3		886.3		723.6		302.2		992.4		7.7		6,385.5
Total revenue	$	3,868.3	$	893.1	$	741.1	$	308.2	$	1,093.3	$	7.7	$	6,911.7

_______________

(1)Data Centers consists of the Company’s data center facilities located in the United States. For the three and nine months ended September 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 September 30, 2022 and 2021 includes straight-line revenue of $127.7 million and $99.6 million, respectively. Property revenue for the nine months ended September 30, 2022 and 2021 includes straight-line revenue of $350.4 million and $324.3 million, respectively.

The Company actively monitors the creditworthiness of its customers. In recognizing customer revenue, the Company assesses the collectibility of both the amounts billed and the portion recognized in advance of billing on a straight-line basis. This assessment takes customer credit risk and business and industry conditions into consideration to ultimately determine the collectibility of the amounts billed. To the extent the amounts, based on management’s estimates, may not be collectible, revenue recognition is deferred until such point as collectibility is determined to be reasonably assured. During the three months ended September 30, 2022, the Company deferred recognition of revenue of approximately $48 million related to a customer in India.

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 September 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.

2.    PREPAID AND OTHER CURRENT ASSETS

Prepaid and other current assets consisted of the following:

	As of
	September 30, 2022		December 31, 2021
Prepaid assets	$	129.4	$	94.5
Prepaid income tax	157.5		128.6
Unbilled receivables	304.4		269.6
Value added tax and other consumption tax receivables	92.2		83.9
Other miscellaneous current assets	103.5		80.6
Prepaid and other current assets	$	787.0	$	657.2

3.    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.

9

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

During the nine months ended September 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 September 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 September 30, 2022 were as follows:

Fiscal Year	Amount (1)
Remainder of 2022	$	1,675.7
2023	7,397.6
2024	7,121.1
2025	6,715.1
2026	6,284.5
Thereafter	33,155.8
Total	$	62,349.8

_______________

(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 nine months ended September 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 September 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 nine months ended September 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 nine months ended September 30, 2022.

Information about other lease-related balances is as follows:

	As of
	September 30, 2022		December 31, 2021
Operating leases:
Right-of-use asset	$	8,857.5	$	9,225.1
Current portion of lease liability	$	766.3	$	712.6
Lease liability	7,566.4		8,041.8
Total operating lease liability	$	8,332.7	$	8,754.4

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

	As of
	September 30, 2022		December 31, 2021
Operating leases:
Weighted-average remaining lease term (years)	12.3		13.0
Weighted-average incremental borrowing rate	5.2	%	5.1	%

The following table sets forth the components of lease cost:

10

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Operating lease cost	$	309.1	$	295.6	$	919.8	$	815.3
Variable lease costs not included in lease liability (1)	92.3		94.3		290.0		248.7

______________

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

Supplemental cash flow information is as follows:

	Nine Months Ended September 30,
	2022		2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(916.0)	$	(798.2)
Non-cash items:
New operating leases (1)	$	289.9	$	1,607.2
Operating lease modifications and reassessments	$	114.2	$	165.3

_______________

(1)Amount includes new operating leases and leases acquired in connection with acquisitions. For the nine months ended September 30, 2021, includes $1.4 billion related to the Telxius Acquisition (as defined in note 14).

As of September 30, 2022, the Company does not have material operating or financing leases that have not yet commenced.

Maturities of operating lease liabilities as of September 30, 2022 were as follows:

Fiscal Year	Operating Lease (1)
Remainder of 2022	$	288.8
2023	1,085.7
2024	1,031.2
2025	971.3
2026	914.8
Thereafter	6,980.9
Total lease payments	11,272.7
Less amounts representing interest	(2,940.0)
Total lease liability	8,332.7
Less current portion of lease liability	766.3
Non-current lease liability	$	7,566.4

_______________

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

11

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

4.    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		(59.1)		—		(43.1)
Other (2)	(7.4)		—		—		—		—		—		—		(7.4)
Effect of foreign currency translation	(4.3)		(85.9)		(78.2)		(448.5)		3.5		—		—		(613.4)
Balance as of September 30, 2022	$	4,636.7	$	904.2	$	534.0	$	2,793.6	$	896.4	$	2,919.3	$	2.0	$	12,686.2

_______________

(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 nine months ended September 30, 2022.

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

		As of September 30, 2022						As of December 31, 2021
	Estimated Useful Lives (years)	Gross Carrying Value		Accumulated Amortization		Net Book Value		Gross Carrying Value		Accumulated Amortization		Net Book Value
Acquired network location intangibles (1)	Up to 20	$	6,045.8	$	(2,483.0)	$	3,562.8	$	6,294.6	$	(2,305.1)	$	3,989.5
Acquired tenant-related intangibles	Up to 20	19,004.1		(5,676.0)		13,328.1		20,030.5		(5,051.5)		14,979.0
Acquired licenses and other intangibles	2-20	1,791.3		(361.9)		1,429.4		1,807.9		(49.2)		1,758.7
Total other intangible assets		$	26,841.2	$	(8,520.9)	$	18,320.3	$	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 September 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 nine months ended September 30, 2022 was $378.4 million and $1.3 billion, respectively. Amortization of intangible assets for the three and nine months ended September 30, 2021 was $318.0 million and $846.2 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:

12

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

Fiscal Year	Amount
Remainder of 2022	$	388.9
2023	1,434.8
2024	1,346.2
2025	1,293.4
2026	1,240.5
2027	1,227.4

5.    ACCRUED EXPENSES

Accrued expenses consisted of the following:

	As of
	September 30, 2022		December 31, 2021
Accrued construction costs	$	129.9	$	197.3
Accrued income tax payable	15.3		84.8
Accrued pass-through costs	83.4		91.0
Amounts payable for acquisitions	16.7		95.2
Amounts payable to tenants	86.0		81.1
Accrued property and real estate taxes	284.3		255.3
Accrued rent	77.7		78.8
Payroll and related withholdings	126.7		124.7
Other accrued expenses	382.7		404.6
Total accrued expenses	$	1,202.7	$	1,412.8

6.    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
	September 30, 2022		December 31, 2021		Maturity Date
2021 Multicurrency Credit Facility (1) (2)	$	4,394.3	$	4,388.4	June 30, 2025
2021 Term Loan (1)	996.0		995.4		January 31, 2027
2021 Credit Facility (1)	705.0		1,410.0		January 31, 2027
2021 EUR Three Year Delayed Draw Term Loan (1) (2)	808.3		937.6		May 28, 2024
2021 USD 364-Day Delayed Draw Term Loan (3)	—		2,998.5		N/A
2021 USD Two Year Delayed Draw Term Loan (1)	1,499.1		1,498.4		December 28, 2023
2.250% senior notes (4)	—		600.3		N/A
3.50% senior notes	999.3		997.9		January 31, 2023
3.000% senior notes	692.7		709.9		June 15, 2023
0.600% senior notes	498.7		497.9		January 15, 2024
5.00% senior notes	1,000.6		1,000.9		February 15, 2024
3.375% senior notes	648.0		647.0		May 15, 2024
2.950% senior notes	646.0		644.7		January 15, 2025
2.400% senior notes	747.0		746.1		March 15, 2025
1.375% senior notes (5)	486.9		563.8		April 4, 2025
4.000% senior notes	746.5		745.5		June 1, 2025
1.300% senior notes	497.1		496.4		September 15, 2025
4.400% senior notes	498.0		497.6		February 15, 2026
1.600% senior notes	696.0		695.2		April 15, 2026
1.950% senior notes (5)	486.9		564.3		May 22, 2026
1.450% senior notes	594.1		593.0		September 15, 2026
3.375% senior notes	992.5		991.2		October 15, 2026

13

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

3.125% senior notes	398.5		398.3		January 15, 2027
2.750% senior notes	745.9		745.2		January 15, 2027
0.450% senior notes (5)	730.1		847.1		January 15, 2027
0.400% senior notes (5)	484.8		562.5		February 15, 2027
3.650% senior notes	642.9		—		March 15, 2027
3.55% senior notes	746.1		745.5		July 15, 2027
3.600% senior notes	694.9		694.3		January 15, 2028
0.500% senior notes (5)	728.5		845.3		January 15, 2028
1.500% senior notes	646.3		645.8		January 31, 2028
3.950% senior notes	592.3		591.6		March 15, 2029
0.875% senior notes (5)	729.9		847.3		May 21, 2029
3.800% senior notes	1,636.4		1,635.1		August 15, 2029
2.900% senior notes	743.2		742.5		January 15, 2030
2.100% senior notes	741.9		741.2		June 15, 2030
0.950% senior notes (5)	483.1		561.0		October 5, 2030
1.875% senior notes	792.1		791.4		October 15, 2030
2.700% senior notes	694.2		693.7		April 15, 2031
2.300% senior notes	691.6		691.0		September 15, 2031
1.000% senior notes (5)	630.2		731.7		January 15, 2032
4.050% senior notes	642.0		—		March 15, 2032
1.250% senior notes (5)	483.1		561.2		May 21, 2033
3.700% senior notes	592.2		592.1		October 15, 2049
3.100% senior notes	1,038.2		1,038.0		June 15, 2050
2.950% senior notes	1,022.0		1,021.5		January 15, 2051
Total American Tower Corporation debt	35,963.4		39,943.3
Series 2013-2A securities (6)	1,299.3		1,298.2		March 15, 2023
Series 2018-1A securities (6)	495.9		495.3		March 15, 2028
Series 2015-2 notes (7)	523.2		522.7		June 16, 2025
CoreSite Debt (8)	—		955.1		N/A
Other subsidiary debt (9)	18.9		8.0		Various
Total American Tower subsidiary debt	2,337.3		3,279.3
Finance lease obligations	28.4		31.6
Total	38,329.1		43,254.2
Less current portion of long-term obligations	(3,015.2)		(4,568.7)
Long-term obligations	$	35,313.9	$	38,685.5

_______________

(1)Accrues interest at a variable rate.

(2)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 during the nine months ended September 30, 2022 using proceeds from (i) the issuance of the 3.650% Notes and the 4.050% Notes (each as defined below), (ii) the June 2022 common stock offering (as further discussed in note 10), (iii) the Stonepeak Transaction (as defined and further discussed in note 11) and (iv) cash on hand.

(4)Repaid in full on January 14, 2022 using borrowings under the 2021 Credit Facility (as defined below).

(5)Notes are denominated in EUR.

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

(7)Maturity date reflects the anticipated repayment date; final legal maturity is June 15, 2050.

(8)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.

(9)Includes (a) 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, and (b) amounts due under drawn letters of credit in Nigeria (as discussed below), which are denominated in USD. As of December 31, 2021 also included U.S. subsidiary debt related to a seller-financed acquisition.

14

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

Current portion of long-term obligations—The Company’s current portion of long-term obligations primarily includes (i) $1.3 billion aggregate principal amount of the Company’s Secured Tower Revenue Securities, Series 2013-2A due March 15, 2023, (ii) $1.0 billion aggregate principal amount of the Company’s 3.50% senior unsecured notes due January 31, 2023 and (iii) $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

15

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

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 nine months ended September 30, 2022, the Company borrowed an aggregate of $850.0 million and repaid an aggregate of $680.0 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 nine months ended September 30, 2022, the Company borrowed an aggregate of $2.7 billion and repaid an aggregate of $3.4 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. On August 11, 2022, the Company repaid all remaining amounts outstanding under the 2021 USD 364-Day Delayed Draw Term Loan using proceeds from the Stonepeak Transaction (as defined and further discussed in note 11).

As of September 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”) 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 (in millions)		Undrawn letters of credit (in millions)		Maturity Date		Current margin over LIBOR or EURIBOR (1)		Current commitment fee (2)
2021 Multicurrency Credit Facility	$	4,394.3	$	3.5	June 30, 2025	(3)	1.125	%	0.110	%
2021 Credit Facility	705.0		24.7		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	808.7		N/A		May 28, 2024		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 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.

(3)Subject to two optional renewal periods.

Nigeria Letters of Credit—During the nine months ended September 30, 2022, the Company drew on letters of credit in Nigeria. The drawn amounts bear interest at a rate equal to the Secured Overnight Financing Rate at the time of drawing plus a spread. Amounts are due 270 days from the date of drawing. As of September 30, 2022, the Company had $13.0 million outstanding under the drawn letters of credit.

16

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

7.    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:

	September 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)	$	33.7	—		—	$	37.1	—		—
Liabilities:
Interest rate swap agreements	—		$	7.6	—	—		—		—
Fair value of debt related to interest rate swap agreements (2)	$	(6.4)	—		—	$	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 nine months ended September 30, 2022, the Company recognized unrealized gains (losses) of $4.4 million and $(3.4) million, respectively, for equity securities held as of September 30, 2022.

(2)Included in the carrying values of the corresponding debt obligations.

During the nine months ended September 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 September 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 nine months ended September 30, 2022 and 2021. There were no other items measured at fair value on a nonrecurring basis during the three and nine months ended September 30, 2022 or 2021.

Fair Value of Financial Instruments—The Company’s financial instruments for which the carrying value reasonably approximates fair value at September 30, 2022 and December 31, 2021 include cash and cash equivalents, restricted cash, accounts receivable and accounts payable. The Company’s estimates of fair value of its long-term obligations, including the current portion, are based primarily upon reported market values. For long-term debt not actively traded, fair value is estimated using either indicative price quotes or a discounted cash flow analysis using rates for debt with similar terms and maturities. As of September 30, 2022 and December 31, 2021, the carrying value of long-term obligations, including the current portion, was $38.3 billion and $43.3 billion, respectively. As of September 30, 2022, the fair value of long-term obligations, including the current portion, was $34.3 billion, of which $23.6 billion was measured using Level 1 inputs and $10.7 billion was measured using Level 2 inputs. As of December 31, 2021, the fair value of long-term obligations, including the current portion, was $44.1 billion, of which $28.5 billion was measured using Level 1 inputs and $15.6 billion was measured using Level 2 inputs.

17

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

8.    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 nine months ended September 30, 2022 were primarily attributable to fewer additions to reserves for the Company’s existing tax positions and reduced earnings in certain foreign jurisdictions. The decrease in the income tax provision during the nine months ended September 30, 2022 also included the reversal of valuation allowances of $79.7 million in certain jurisdictions, as compared to a reversal of $8.8 million during the nine months ended September 30, 2021. 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 September 30, 2022 and December 31, 2021, the total unrecognized tax benefits that would impact the ETR, if recognized, were approximately $99.7 million and $94.8 million, respectively. The amount of unrecognized tax benefits during the three and nine months ended September 30, 2022 includes (i) additions to the Company’s existing tax positions of $2.2 million and $11.8 million, respectively, including remeasurements of acquired liabilities of $3.5 million for the nine months ended September 30, 2022, (ii) reductions due to foreign currency exchange rate fluctuations of $3.9 million and $6.3 million, respectively, and (iii) reductions due to settlements of $1.6 million. 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 $23.3 million.

The Company recorded the following penalties and income tax-related interest expense during the three and nine months ended September 30, 2022 and 2021:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Penalties and income tax-related interest expense (1)	$	3.7	$	9.6	$	15.2	$	43.1

_______________

(1)Nine months ended September 30, 2021 reflects an increase of $16.6 million due to a reclassification of unrecognized tax benefits to penalties and income tax-related interest expense.

As of September 30, 2022 and December 31, 2021, the total amount of accrued income tax related interest and penalties included in the consolidated balance sheets were $52.8 million and $42.3 million, respectively.

9.    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 September 30, 2022, the Company had the ability to grant stock-based awards with respect to an aggregate of 5.2 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

18

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

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 nine months ended September 30, 2022 and 2021, the Company recorded the following stock-based compensation expense in selling, general, administrative and development expense:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Stock-based compensation expense	$	39.2	$	28.1	$	138.1	$	98.0

Stock Options—As of September 30, 2022, there was no unrecognized compensation expense related to unvested stock options.

The Company’s option activity for the nine months ended September 30, 2022 was as follows (shares disclosed in full amounts):

	Number of Options
Outstanding as of January 1, 2022	1,067,999
Exercised	(157,168)
Forfeited	—
Expired	—
Outstanding as of September 30, 2022	910,831

Restricted Stock Units—As of September 30, 2022, total unrecognized compensation expense related to unvested RSUs granted under the 2007 Plan, including the CoreSite Replacement Awards (as defined below), was $199.7 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 September 30, 2022, total unrecognized compensation expense related to the CoreSite Replacement Awards was $9.8 million and is expected to be recognized over a weighted average period of approximately one year.

Performance-Based Restricted Stock Units—During the nine months ended September 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.

19

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

Restricted Stock Units and Performance-Based Restricted Stock Units—The Company’s RSU and PSU activity for the nine months ended September 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)	(537,264)	(98,188)
Forfeited	(61,586)	—
Outstanding as of September 30, 2022	1,401,606	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.

During the three and nine months ended September 30, 2022, the Company recorded $8.3 million and $26.6 million, respectively, in stock-based compensation expense for equity awards in which the performance goals have been established and were probable of being achieved. The remaining unrecognized compensation expense related to these awards at September 30, 2022 was $8.6 million based on the Company’s current assessment of the probability of achieving the performance goals. The weighted average period over which the cost will be recognized is approximately two years.

10.    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 nine months ended September 30, 2022, the Company received an aggregate of $21.0 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 September 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.

20

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

During the nine months ended September 30, 2022, there were no repurchases under either of the Buyback Programs. As of September 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 September 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 nine months ended September 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
September 21, 2022	October 26, 2022	October 11, 2022	$	1.47	$	684.4
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 nine months ended September 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
September 16, 2021	October 15, 2021	September 28, 2021	$	1.31	$	596.6
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.

The Company accrues distributions on unvested restricted stock units, which are payable upon vesting. As of September 30, 2022, the amount accrued for distributions payable related to unvested restricted stock units was $13.5 million. During the nine months ended September 30, 2022 and 2021, the Company paid $6.8 million and $7.5 million of distributions upon the vesting of restricted stock units, respectively. To maintain its qualification for taxation as a REIT, the Company expects to continue paying distributions, the amount, timing and frequency of which will be determined, and subject to adjustment, by the Company’s Board of Directors.

11.    NONCONTROLLING INTERESTS

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

21

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

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 September 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.

Stonepeak Transaction—In July 2022, the Company entered into an agreement with certain investment vehicles affiliated with Stonepeak Partners LP (such investment vehicles, collectively, “Stonepeak”) for Stonepeak to acquire a 29% noncontrolling ownership interest in the Company’s U.S. data center business. The transaction was completed in August 2022 for total aggregate consideration of $2.5 billion, through an investment in common equity of $1,750.0 million and mandatorily convertible preferred equity of $750.0 million (the “Stonepeak Transaction”).

As of September 30, 2022, the Company holds a common equity interest of approximately 77% in its U.S. data center business, with Stonepeak holding approximately 23% of the outstanding common equity and 100% of the outstanding mandatorily convertible preferred equity. On a fully converted basis, which is expected to occur four years from the date of closing in August 2022, 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%. The mandatorily convertible preferred equity, which accrues dividends at 5.0%, will convert into common equity on a one for one basis, subject to adjustment that will be measured on the conversion date.

Subsequent to September 30, 2022, Stonepeak acquired additional noncontrolling ownership interests in the Company’s U.S. data center business, as further discussed in note 16.

Dividends to noncontrolling interests— Certain of the Company’s subsidiaries may, from time to time, declare dividends. In December 2021, AT Iberia C.V., one of the Company’s subsidiaries in Spain, 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.

In August 2022, AT Rhine C.V., one of the Company’s subsidiaries in Germany, declared and paid a dividend of 25.0 million EUR (approximately $25.1 million at the date of payment), pursuant to the terms of the ownership agreements, to ATC Europe and PGGM in proportion to their respective equity interests in AT Rhine C.V.

As of September 30, 2022, the amount accrued for distributions payable related to the outstanding Stonepeak mandatorily convertible preferred equity was $5.5 million.

22

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

The changes in noncontrolling interests were as follows:

	Nine Months Ended September 30,
	2022		2021
Balance as of January 1,	$	3,988.4	$	474.9
ATC Europe Transactions (1)	—		3,078.2
Bangladesh partnership (2)	—		10.2
Stonepeak Transaction (3)	2,500.0		—
Adjustment to noncontrolling interest due to reorganization (4)	—		601.0
Redemption of noncontrolling interest (5)	—		(1.7)
Net (loss) income attributable to noncontrolling interests (6)	(36.3)		6.9
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax	(458.6)		(103.3)
Contributions from noncontrolling interest holders	52.6		—
Distributions to noncontrolling interest holders (6)	(9.3)		(0.4)
Balance as of September 30,	$	6,036.8	$	4,065.8

_______________

(1)Represents the impact of contributions received from CDPQ and Allianz described above on Noncontrolling interests as of September 30, 2021. Reflected within Contributions from noncontrolling interest holders in the consolidated statements of equity.

(2)Represents the impact of contributions made by the Company to establish the joint venture in Bangladesh described above on Noncontrolling interests as of September 30, 2021. Reflected within Purchase of noncontrolling interest in the consolidated statements of equity.

(3)Represents the impact of contributions received from Stonepeak described above on Noncontrolling interests as of September 30, 2022. Reflected within Contributions from noncontrolling interest holders in the consolidated statements of equity.

(4)Represents the impact of the reorganization of European interests described above on Noncontrolling interests.

(5)Represents the impact of the purchase of interests described above on Noncontrolling interests.

(6)For the nine months ended September 30, 2022, primarily includes $5.5 million of distributions payable related to the outstanding Stonepeak mandatorily convertible preferred equity and a dividend of $3.2 million paid to PGGM.

12.    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 September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Net income attributable to American Tower Corporation common stockholders	$	839.7	$	723.0	$	2,449.6	$	2,114.3
Basic weighted average common shares outstanding	465,594		455,224		460,141		450,148
Dilutive securities	1,207		1,753		1,219		1,833
Diluted weighted average common shares outstanding	466,801		456,977		461,360		451,981
Basic net income attributable to American Tower Corporation common stockholders per common share	$	1.80	$	1.59	$	5.32	$	4.70
Diluted net income attributable to American Tower Corporation common stockholders per common share	$	1.80	$	1.58	$	5.31	$	4.68

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 September 30,		Nine Months Ended September 30,
	2022	2021	2022	2021
Restricted stock units	—	—	88	—

13.    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.

23

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

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 September 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.

24

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

14.    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 nine months ended September 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 nine months ended September 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 September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Acquisition and merger related expenses	$	29.0	$	25.3	$	38.2	$	88.8
Integration costs	$	14.0	$	6.9	$	38.8	$	32.9

During the nine months ended September 30, 2022 and 2021, the Company also recorded benefits of $8.5 million and $4.4 million, respectively, related to pre-acquisition contingencies and settlements. The three and nine months ended September 30, 2022 included acquisition and merger related costs associated with the Stonepeak Transaction. The three and nine months ended September 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 nine months ended September 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 nine months ended September 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. This acquisition is being accounted for as an asset acquisition and is included in the table below in “Other.”

25

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

Other Acquisitions—During the nine months ended September 30, 2022, the Company acquired a total of 258 communications sites, as well as other communications infrastructure assets, in the United States, Canada, France, Mexico, Nigeria and Poland, including 208 communications sites in connection with the Company’s agreement with Orange S.A. (“Orange”), as further described below, for an aggregate purchase price of $174.2 million. Of the aggregate purchase price, $11.6 million is reflected as a payable in the consolidated balance sheet as of September 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	$	33.3
Property and equipment	113.6
Intangible assets (1):
Tenant-related intangible assets	143.7
Network location intangible assets	18.8
Other intangible assets	—
Other non-current assets	18.7
Current liabilities	(1.1)
Deferred tax liability	—
Other non-current liabilities	(24.0)
Net assets acquired	303.0
Goodwill	—
Fair value of net assets acquired	303.0
Purchase price	$	303.0

_______________

(1)Tenant-related intangible assets and network location intangible assets are amortized on a straight-line basis over the estimated useful lives of the assets.

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 208 communications sites acquired during the nine months ended September 30, 2022, the Company acquired 1,197 of these communications sites during the years ended December 31, 2020 and 2021. Subsequent to September 30, 2022, the Company completed the acquisition of an additional 75 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, 255.5 million EUR (approximately $250.5 million), including post-closing adjustments, of deferred payments are due in September 2025 and are reflected in Other non-current liabilities in the consolidated

26

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

balance sheet as of September 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 September 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 over the estimated useful lives of the assets.

27

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

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 September 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)		(154.8)
Deferred tax liability	—		—
Other non-current liabilities	(323.1)		(340.6)
Net assets acquired	7,456.0		$	7,515.1
Goodwill	2,943.3		2,884.2
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 over a 10 year period. Other intangible assets are amortized on a straight-line basis over the estimated useful lives of the assets.

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 September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Pro forma revenues	$	2,671.9	$	2,638.7	$	8,011.7	$	7,749.4
Pro forma net income attributable to American Tower Corporation common stockholders	$	839.4	$	574.6	$	2,449.2	$	1,708.9
Pro forma net income per common share amounts:
Basic net income attributable to American Tower Corporation common stockholders	$	1.80	$	1.24	$	5.26	$	3.68
Diluted net income attributable to American Tower Corporation common stockholders	$	1.80	$	1.23	$	5.25	$	3.67

28

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

15.    BUSINESS SEGMENTS

Property

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

Data Centers—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 September 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 nine months ended September 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.

29

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

	Property												Total  Property		Services		Other		Total
Three Months Ended September 30, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	1,259.2	$	249.2	$	303.4	$	184.0	$	420.4	$	193.7	$	2,609.9	$	61.6			$	2,671.5
Segment operating expenses	219.0		171.8		119.8		83.0		131.5		83.7		808.8		27.7				836.5
Segment gross margin	1,040.2		77.4		183.6		101.0		288.9		110.0		1,801.1		33.9				1,835.0
Segment selling, general, administrative and development expense (1)	48.0		10.9		19.4		12.4		26.7		15.8		133.2		5.5				138.7
Segment operating profit	$	992.2	$	66.5	$	164.2	$	88.6	$	262.2	$	94.2	$	1,667.9	$	28.4			$	1,696.3
Stock-based compensation expense																	$	39.2	39.2
Other selling, general, administrative and development expense																	53.3		53.3
Depreciation, amortization and accretion																	898.1		898.1
Other income (2)																	(150.1)		(150.1)
Income from continuing operations before income taxes																			$	855.8
Total assets	$	26,749.3	$	4,799.6	$	4,592.6	$	10,513.7	$	8,477.7	$	10,750.8	$	65,883.7	$	96.9	$	532.2	$	66,512.8

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $39.2 million.

(2)Primarily includes gains from foreign currency exchange rate fluctuations, partially offset by interest expense.

30

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

	Property												Total  Property		Services		Other		Total
Three Months Ended September 30, 2021	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	1,228.5	$	313.5	$	257.4	$	175.8	$	391.0	$	2.7	$	2,368.9	$	85.4			$	2,454.3
Segment operating expenses	220.2		187.1		88.2		73.0		123.7		1.2		693.4		30.9				724.3
Segment gross margin	1,008.3		126.4		169.2		102.8		267.3		1.5		1,675.5		54.5				1,730.0
Segment selling, general, administrative and development expense (1)	47.0		21.5		16.5		12.8		26.3		1.1		125.2		3.8				129.0
Segment operating profit	$	961.3	$	104.9	$	152.7	$	90.0	$	241.0	$	0.4	$	1,550.3	$	50.7			$	1,601.0
Stock-based compensation expense																	$	28.1	28.1
Other selling, general, administrative and development expense																	48.8		48.8
Depreciation, amortization and accretion																	611.4		611.4
Other expense (2)																	135.1		135.1
Income from continuing operations before income taxes																			$	777.6
Total assets	$	27,281.2	$	5,164.2	$	4,965.4	$	12,123.2	$	8,764.1	$	93.8	$	58,391.9	$	100.9	$	2,037.2	$	60,530.0

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $28.1 million.

(2)Primarily includes interest expense, partially offset by gains from foreign currency exchange rate fluctuations.

31

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

	Property												Total  Property		Services		Other		Total
Nine Months Ended September 30, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	3,727.5	$	845.7	$	856.7	$	561.3	$	1,264.9	$	569.1	$	7,825.2	$	180.9			$	8,006.1
Segment operating expenses	631.4		528.6		329.4		250.6		395.0		239.3		2,374.3		84.5				2,458.8
Segment gross margin	3,096.1		317.1		527.3		310.7		869.9		329.8		5,450.9		96.4				5,547.3
Segment selling, general, administrative and development expense (1)	134.3		64.9		63.9		41.4		81.4		47.7		433.6		16.6				450.2
Segment operating profit	$	2,961.8	$	252.2	$	463.4	$	269.3	$	788.5	$	282.1	$	5,017.3	$	79.8			$	5,097.1
Stock-based compensation expense																	$	138.1	138.1
Other selling, general, administrative and development expense																	159.7		159.7
Depreciation, amortization and accretion																	2,540.4		2,540.4
Other income (2)																	(220.4)		(220.4)
Income from continuing operations before income taxes																			$	2,479.3

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $138.1 million.

(2)Primarily includes gains from foreign currency exchange rate fluctuations, partially offset by interest expense.

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AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

	Property												Total  Property		Services		Other		Total
Nine Months Ended September 30, 2021	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	3,688.2	$	893.1	$	741.1	$	308.2	$	1,093.3	$	7.7	$	6,731.6	$	180.1			$	6,911.7
Segment operating expenses	628.0		546.4		254.8		110.7		337.0		3.1		1,880.0		66.5				1,946.5
Segment gross margin	3,060.2		346.7		486.3		197.5		756.3		4.6		4,851.6		113.6				4,965.2
Segment selling, general, administrative and development expense (1)	126.4		52.7		52.9		26.3		79.6		3.4		341.3		12.1				353.4
Segment operating profit	$	2,933.8	$	294.0	$	433.4	$	171.2	$	676.7	$	1.2	$	4,510.3	$	101.5			$	4,611.8
Stock-based compensation expense																	$	98.0	98.0
Other selling, general, administrative and development expense																	144.3		144.3
Depreciation, amortization and accretion																	1,688.7		1,688.7
Other expense (2)																	379.9		379.9
Income from continuing operations before income taxes																			$	2,300.9

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $98.0 million.

(2)Primarily includes interest expense, partially offset by gains from foreign currency exchange rate fluctuations.

16.    SUBSEQUENT EVENTS

Stonepeak Additional Investment—In October 2022, the Company entered into an agreement with Stonepeak for Stonepeak to acquire additional common equity and mandatorily preferred equity interests in the Company’s U.S. data center business for total aggregate consideration of $570.0 million. The transaction was completed on October 20, 2022. The Company used the proceeds to repay existing indebtedness under the 2021 Multicurrency Credit Facility.

After the completion of the transaction, the Company holds a common equity interest of approximately 72% in its U.S. data center business, with Stonepeak holding approximately 28% of the outstanding common equity and 100% of the outstanding mandatorily convertible preferred equity. On a fully converted basis, which is expected to occur four years from the date of the initial closing in August 2022, and on the basis of the currently outstanding equity, the Company will hold a controlling ownership interest of approximately 64%, with Stonepeak holding approximately 36%.

Vodafone Idea—On October 21, 2022, a subsidiary of the Company, ATC Telecom Infrastructure Private Limited (“ATC TIPL”), and Vodafone Idea Limited (“VIL”) notified the stock exchange of India that both parties have board approvals in relation to an issuance of convertible debentures pursuant to which, in exchange for VIL’s payment of certain amounts towards accounts receivables, ATC TIPL shall pay equivalent amounts towards subscription to convertible debentures issued by VIL. The convertible debentures are to be repaid by VIL with interest and ATC TIPL has the option to convert the debentures into equity of VIL. The issuance of the debentures is subject to certain conditions precedent.

New Zealand Acquisition—On October 25, 2022, the Company, through its recently formed New Zealand subsidiary, acquired land under carrier or other third-party communications sites in New Zealand from Clearspan Pty Ltd for total consideration of approximately 50 million New Zealand Dollars (approximately $29 million at the date of closing).

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This Quarterly Report on Form 10-Q (this “Quarterly Report”) contains forward-looking statements relating to our goals, beliefs, plans or current expectations and other statements that are not of historical facts. For example, when we use words such as “project,” “believe,” “anticipate,” “expect,” “forecast,” “estimate,” “intend,” “should,” “would,” “could,” “may” or other words that convey uncertainty of future events or outcomes, we are making forward-looking statements. Certain important factors may cause actual results to differ materially from those indicated by our forward-looking statements, including those set forth under the caption “Risk Factors” in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2021 (the “2021 Form 10-K”). Forward-looking statements represent management’s current expectations and are inherently uncertain. We do not undertake any obligation to update forward-looking statements made by us.

The discussion and analysis of our financial condition and results of operations that follow are based upon our consolidated and condensed consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”). The preparation of our financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses, and the related disclosure of contingent assets and liabilities at the date of our financial statements. Actual results may differ from these estimates and such differences could be material to the financial statements. This discussion should be read in conjunction with our consolidated and condensed consolidated financial statements herein and the accompanying notes, information set forth under the caption “Critical Accounting Policies and Estimates” in the 2021 Form 10-K, and in particular, the information set forth therein under Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

During the fourth quarter of 2021, as a result of the acquisition of CoreSite Realty Corporation (“CoreSite,” and the acquisition, the “CoreSite Acquisition”), we updated our reportable segments to add a Data Centers segment. The Data Centers segment is included within our property operations. We now report our results in seven segments – U.S. & Canada property (which includes all assets in the United States and Canada, other than our data center facilities and related assets), Asia-Pacific property, Africa property, Europe property, Latin America property, Data Centers and Services. We believe this change provides greater visibility into our operating segments and aligns our reporting with management’s current approach of allocating costs and resources, managing growth and profitability and assessing the operating performance of our business segments (see note 15 to our consolidated and condensed consolidated financial statements included in this Quarterly Report). This change applied to our business operations results beginning with the fourth quarter of 2021 and had no impact on our consolidated financial statements for any prior periods. Historical financial information included in Management’s Discussion and Analysis of Financial Condition and Results of Operations has been adjusted to reflect the change in reportable segments.

Overview

We are one of the largest global real estate investment trusts and a leading independent owner, operator and developer of multitenant communications real estate. Our primary business is the leasing of space on 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. In addition to the communications sites in our portfolio, we manage rooftop and tower sites for property owners under various contractual arrangements. We also hold other telecommunications infrastructure, fiber and property interests that we lease primarily to communications service providers and third-party tower operators, and, as discussed further below, we hold a portfolio of highly interconnected data center facilities and related assets in the United States. Our customers include our tenants, licensees and other payers. We refer to the business encompassing the above as our property operations, which accounted for 98% of our total revenues for each of the three and nine months ended September 30, 2022 and includes our U.S. & Canada property, Asia-Pacific property, Africa property, Europe property, Latin America property and Data Centers segments.

We also offer tower-related services in the United States, including site application, zoning and permitting and structural analysis, which primarily support our site leasing business, including the addition of new tenants and equipment on our sites.

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The following table details the number of communications sites, excluding managed sites, that we owned or operated as of September 30, 2022: 

	Number of Owned Towers	Number of Operated  Towers (1)	Number of Owned DAS Sites
U.S. & Canada:
Canada	222	—	—
United States	27,275	15,339	454
U.S. & Canada total	27,497	15,339	454
Asia-Pacific: (2)
Bangladesh	412	—	—
India	75,581	—	836
Philippines	303	—	—
Asia-Pacific total	76,296	—	836
Africa:
Burkina Faso	707	—	—
Ghana	3,537	657	29
Kenya	3,327	—	9
Niger	839	—	—
Nigeria	7,411	—	—
South Africa	2,969	—	—
Uganda	3,930	—	12
Africa total	22,720	657	50
Europe:
France	3,686	303	8
Germany	14,759	—	—
Poland	51	—	—
Spain	11,578	—	1
Europe total	30,074	303	9
Latin America:
Argentina	495	—	11
Brazil	20,643	2,052	121
Chile	3,738	—	138
Colombia	4,977	—	6
Costa Rica	695	—	2
Mexico	9,627	186	92
Paraguay	1,445	—	—
Peru	3,938	450	1
Latin America total	45,558	2,688	371

_______________

(1)Approximately 95% of the operated towers are held pursuant to long-term finance leases, including those subject to purchase options.

(2)We also control land under carrier or other third-party communications sites in Australia, which provides recurring cash flow through tenant leasing arrangements.

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As of September 30, 2022, our property portfolio included 28 operating data center facilities across ten markets in the United States that collectively comprise approximately 3.1 million net rentable square feet (“NRSF”) of data center space, as detailed below:

	Number of Data Centers	Total NRSF (1)
		(in thousands)
San Francisco Bay, CA	8	940
Los Angeles, CA	3	670
Northern Virginia, VA	5	536
New York, NY	2	237
Chicago, IL	2	216
Boston, MA	1	143
Denver, CO	2	35
Miami, FL	2	47
Orlando, FL	1	129
Atlanta, GA	2	128
Total	28	3,081

_______________

(1)Excludes approximately 0.4 million of office and light industrial NRSF acquired as part of the CoreSite Acquisition.

We operate in seven reportable segments: U.S. & Canada property, Asia-Pacific property, Africa property, Europe property, Latin America property, Data Centers and Services. In evaluating operating performance in each business segment, management uses, among other factors, segment gross margin and segment operating profit (see note 15 to our consolidated and condensed consolidated financial statements included in this Quarterly Report).

The 2021 Form 10-K contains information regarding management’s expectations of long-term drivers of demand for our communications sites, as well as key trends, which management believes provide valuable insight into our operating and financial resource allocation decisions. The discussion below should be read in conjunction with the 2021 Form 10-K and, in particular, the information set forth therein under Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Executive Overview.”

In most of our markets, our tenant leases with wireless carriers generally have initial non-cancellable terms of five to ten years with multiple renewal terms. Accordingly, the vast majority of the revenue generated by our property operations during the three and nine months ended September 30, 2022 was recurring revenue that we should continue to receive in future periods. Most of our tenant leases for our communications sites have provisions that periodically increase the rent due under the lease, typically based on an annual fixed escalation (averaging approximately 3% in the United States) or an inflationary index in most of our international markets, or a combination of both. In addition, certain of our tenant leases provide for additional revenue primarily to cover costs (pass-through revenue), such as ground rent or power and fuel costs.

Based upon existing customer leases and foreign currency exchange rates as of September 30, 2022, we expect to generate over $62 billion of non-cancellable customer lease revenue over future periods, before the impact of straight-line lease accounting.

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Following the court rulings by the Supreme Court of India regarding carriers’ obligations for the adjusted gross revenue (“AGR”) fees and charges prescribed by such court, we continue to experience variability and a level of uncertainty in collections in India. As further discussed in Item 1A of this Quarterly Report on Form 10-Q under the caption “Risk Factors— A substantial portion of our revenue is derived from a small number of customers, and we are sensitive to adverse changes in the creditworthiness and financial strength of our customers,” our largest customer in India, Vodafone Idea Limited (“VIL”), has indicated that it would make a partial payment of its contractual amounts owed to us under tenant leases for the remainder of 2022 (the “VIL Shortfall”), including amounts owed for the three months ended September 30, 2022. For the three months ended September 30, 2022, the shortfall in payments totaled approximately $48 million. We have deferred recognition of revenue on the shortfall amount until payment is received. Recognition of revenue on any future shortfalls in payment of contractual amounts will be similarly deferred. Based on indications from VIL, we expect to defer recognition of a similar amount for the three months ended December 31, 2022, pending resolution. VIL has communicated its intent to fulfill the full amount of its contractual obligations commencing January 1, 2023, although no assurance can be given that this will occur.

On October 21, 2022, our subsidiary, ATC Telecom Infrastructure Private Limited (“ATC TIPL”), and VIL notified the stock exchange of India that both parties have board approvals in relation to an issuance of convertible debentures pursuant to which, in exchange for VIL’s payment of certain amounts towards accounts receivables, ATC TIPL shall pay equivalent amounts towards subscription to convertible debentures issued by VIL. The convertible debentures are to be repaid by VIL with interest and ATC TIPL has the option to convert the debentures into equity of VIL. The issuance of the debentures is subject to certain conditions precedent.

We are required to periodically evaluate the carrying value of our assets, or when significant changes in projected cash flows arise, which may result in the realization of impairment expense or other similar charges. For more information, please see our discussion below under the caption “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates.”

The revenues generated by our property operations may be affected by cancellations of existing tenant leases. As discussed above, most of our tenant leases with wireless carriers and broadcasters are multiyear contracts, which typically are non-cancellable; however, in some instances, a lease may be cancelled upon the payment of a termination fee. Revenue lost from either tenant lease cancellations or the non-renewal of leases or rent renegotiations, which we refer to as churn, has historically not had a material adverse effect on the revenues generated by our consolidated property operations. During the nine months ended September 30, 2022, churn was approximately 5% of our tenant billings, primarily driven by churn in our U.S. & Canada property segment, as discussed below.

We expect that our churn rate in our U.S. & Canada property segment will remain elevated for a period of several years due to contractual lease cancellations and non-renewals by T-Mobile, including legacy Sprint Corporation leases, pursuant to the terms of our master lease agreement with T-Mobile US, Inc. (the “T-Mobile MLA”) entered into in September 2020.

As further set forth under the caption “Risk Factors” in Part I, Item 1A of the 2021 Form 10-K, the ongoing coronavirus (“COVID-19”) pandemic, as well as the response to mitigate its spread and effects, may adversely impact us and our customers and the demand for our communications infrastructure in the United States and globally. We have taken a variety of actions to ensure the continued availability of our communications infrastructure assets, while ensuring the safety and security of our employees, customers, vendors and surrounding communities. We will continue to actively monitor the situation and may take further actions as may be required by governmental authorities or that we determine are in the best interests of our employees, customers and business partners.

Non-GAAP Financial Measures

Included in our analysis of our results of operations are discussions regarding earnings before interest, taxes, depreciation, amortization and accretion, as adjusted (“Adjusted EBITDA”), Funds From Operations, as defined by the National Association of Real Estate Investment Trusts (“Nareit FFO”) attributable to American Tower Corporation common stockholders, Consolidated Adjusted Funds From Operations (“Consolidated AFFO”) and AFFO attributable to American Tower Corporation common stockholders.

We define Adjusted EBITDA as Net income before Income (loss) from equity method investments; Income tax benefit (provision); Other income (expense); Gain (loss) on retirement of long-term obligations; Interest expense; Interest income; Other operating income (expense); Depreciation, amortization and accretion; and stock-based compensation expense.

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Nareit FFO attributable to American Tower Corporation common stockholders is defined as net income before gains or losses from the sale or disposal of real estate, real estate related impairment charges, real estate related depreciation, amortization and accretion and dividends on preferred stock and to noncontrolling interests, and including adjustments for (i) unconsolidated affiliates and (ii) noncontrolling interests. In this section, we refer to Nareit FFO attributable to American Tower Corporation common stockholders as “Nareit FFO (common stockholders).”

We define Consolidated AFFO as Nareit FFO (common stockholders) before (i) straight-line revenue and expense; (ii) stock-based compensation expense; (iii) the deferred portion of income tax and other income tax adjustments; (iv) non-real estate related depreciation, amortization and accretion; (v) amortization of deferred financing costs, capitalized interest, debt discounts and premiums and long-term deferred interest charges; (vi) other income (expense); (vii) gain (loss) on retirement of long-term obligations; (viii) other operating income (expense); and adjustments for (ix) unconsolidated affiliates and (x) noncontrolling interests, less cash payments related to capital improvements and cash payments related to corporate capital expenditures.

We define AFFO attributable to American Tower Corporation common stockholders as Consolidated AFFO, excluding the impact of noncontrolling interests on both Nareit FFO (common stockholders) and the other adjustments included in the calculation of Consolidated AFFO. In this section, we refer to AFFO attributable to American Tower Corporation common stockholders as “AFFO (common stockholders).”

Adjusted EBITDA, Nareit FFO (common stockholders), Consolidated AFFO and AFFO (common stockholders) are not intended to replace net income or any other performance measures determined in accordance with GAAP. None of Adjusted EBITDA, Nareit FFO (common stockholders), Consolidated AFFO or AFFO (common stockholders) represents cash flows from operating activities in accordance with GAAP and, therefore, these measures should not be considered indicative of cash flows from operating activities, as a measure of liquidity or a measure of funds available to fund our cash needs, including our ability to make cash distributions. Rather, Adjusted EBITDA, Nareit FFO (common stockholders), Consolidated AFFO and AFFO (common stockholders) are presented as we believe each is a useful indicator of our current operating performance. We believe that these metrics are useful to an investor in evaluating our operating performance because (1) each is a key measure used by our management team for decision making purposes and for evaluating our operating segments’ performance; (2) Adjusted EBITDA is a component underlying our credit ratings; (3) Adjusted EBITDA is widely used in the telecommunications real estate sector to measure operating performance as depreciation, amortization and accretion may vary significantly among companies depending upon accounting methods and useful lives, particularly where acquisitions and non-operating factors are involved; (4) Consolidated AFFO is widely used in the telecommunications real estate sector to adjust Nareit FFO (common stockholders) for items that may otherwise cause material fluctuations in Nareit FFO (common stockholders) growth from period to period that would not be representative of the underlying performance of property assets in those periods; (5) each provides investors with a meaningful measure for evaluating our period-to-period operating performance by eliminating items that are not operational in nature; and (6) each provides investors with a measure for comparing our results of operations to those of other companies, particularly those in our industry.

Our measurement of Adjusted EBITDA, Nareit FFO (common stockholders), Consolidated AFFO and AFFO (common stockholders) may not, however, be fully comparable to similarly titled measures used by other companies. Reconciliations of Adjusted EBITDA, Nareit FFO (common stockholders), Consolidated AFFO and AFFO (common stockholders) to net income, the most directly comparable GAAP measure, have been included below.

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Results of Operations

Three and Nine Months Ended September 30, 2022 and 2021

(in millions, except percentages)

Revenue

	Three Months Ended September 30,				Percent Increase (Decrease)		Nine Months Ended September 30,				Percent Increase (Decrease)
	2022		2021				2022		2021
Property
U.S. & Canada	$	1,259.2	$	1,228.5	2	%	$	3,727.5	$	3,688.2	1	%
Asia-Pacific	249.2		313.5		(21)		845.7		893.1		(5)
Africa	303.4		257.4		18		856.7		741.1		16
Europe	184.0		175.8		5		561.3		308.2		82
Latin America	420.4		391.0		8		1,264.9		1,093.3		16
Data Centers	193.7		2.7		7,074		569.1		7.7		7,291
Total property	2,609.9		2,368.9		10		7,825.2		6,731.6		16
Services	61.6		85.4		(28)		180.9		180.1		0
Total revenues	$	2,671.5	$	2,454.3	9	%	$	8,006.1	$	6,911.7	16	%

Three Months Ended September 30, 2022

U.S. & Canada property segment revenue growth of $30.7 million was attributable to:

• An increase of $28.8 million in other revenue, which included a $22.9 million increase due to straight-line accounting; and

• Tenant billings growth of $2.0 million, which was driven by:

• $38.1 million due to leasing additional space on our sites (“colocations”) and amendments;

• Partially offset by:

• A decrease of $33.0 million resulting from churn in excess of contractual escalations (as discussed above, we expect that our churn rate will be elevated for a period of several years due to the terms of the T-Mobile MLA);

• A decrease of $1.7 million from sites acquired or constructed since the beginning of the prior-year period (“newly acquired or constructed sites”), which includes the impact of the disposition of certain operations acquired in connection with our acquisition of InSite Wireless Group, LLC (the “InSite Acquisition”); and

• A decrease of $1.4 million from other tenant billings.

Segment revenue growth was not meaningfully impacted by foreign currency translation related to fluctuations in Canadian Dollar (“CAD”).

Asia-Pacific property segment revenue decrease of $64.3 million was attributable to:

• A decrease of $39.2 million in other revenue, primarily due to revenue reserves of $26.1 million related to the VIL Shortfall, (as discussed above), as compared to the prior-year period, which included net recoveries of reserves; and

• A decrease of $16.0 million in pass-through revenue, primarily due to revenue reserves of $22.2 million related to the VIL Shortfall, partially offset by an increase in fuel prices;

• Partially offset by tenant billings growth of $8.9 million, which was driven by:

• $7.8 million due to colocations and amendments; and

• $5.9 million generated from newly acquired or constructed sites;

• Partially offset by:

•A decrease of $4.6 million resulting from churn in excess of contractual escalations; and

•A decrease of $0.2 million from other tenant billings.

Segment revenue decline included a decrease of $18.0 million attributable to the negative impact of foreign currency translation related to fluctuations in Indian Rupee (“INR”).

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Africa property segment revenue growth of $46.0 million was attributable to:

• An increase of $57.8 million in pass-through revenue, primarily due to an increase in fuel prices;

• Tenant billings growth of $23.5 million, which was driven by:

• $14.2 million due to colocations and amendments;

• $10.6 million generated from newly acquired or constructed sites; and

• An increase of $0.1 million from other tenant billings;

• Partially offset by a decrease of $1.4 million resulting from churn in excess of contractual escalations; and

• An increase of $0.1 million in other revenue.

Segment revenue growth included a decrease of $35.4 million, attributable to the impact of foreign currency translation, which included, among others, negative impacts of $17.1 million related to fluctuations in Ghanaian Cedi (“GHS”), $6.0 million related to fluctuations in South African Rand (“ZAR”), $3.3 million related to fluctuations in Nigerian Naira (“NGN”), $3.3 million related to fluctuations in West African CFA Franc (“CFA”) and $2.9 million related to fluctuations in Ugandan Shilling.

Europe property segment revenue growth of $8.2 million was attributable to:

• Tenant billings growth of $16.2 million, which was driven by:

• $9.4 million generated from newly acquired or constructed sites, primarily attributable to our transaction with Telxius Telecom, S.A. (“Telxius,” and the acquisition, the “Telxius Acquisition”) and our agreements with Orange S.A. (“Orange”);

• $3.6 million resulting from contractual escalations, net of churn; and

• $3.2 million due to colocations and amendments;

• An increase of $12.4 million in pass-through revenue, primarily due to an increase in energy costs; and

• An increase of $10.4 million in other revenue.

Segment revenue growth included a decrease of $30.8 million primarily attributable to the negative impact of foreign currency translation related to fluctuations in Euro (“EUR”).

Latin America property segment revenue growth of $29.4 million was attributable to:

• Tenant billings growth of $21.1 million, which was driven by:

• $11.4 million from contractual escalations, net of churn;

• $8.4 million due to colocations and amendments;

• $0.7 million generated from newly acquired or constructed sites; and

• $0.6 million from other tenant billings; and

• An increase of $10.6 million in pass-through revenue, primarily attributable to increased pass-through ground rent costs in Brazil; and

• An increase of $7.4 million in other revenue, primarily due to a decrease in revenue reserves.

Segment revenue growth included a decrease of $9.7 million, attributable to the impact of foreign currency translation, which included, among others, negative impacts of $4.3 million related to fluctuations in Chilean Peso (“CLP”), $3.6 million related to fluctuations in Colombian Peso (“COP”) and $1.5 million related to fluctuations in Mexican Peso.

Data Centers segment revenue growth of $191.0 million was attributable to data centers acquired in the fourth quarter of 2021, including through the CoreSite Acquisition.

Services segment revenue decrease of $23.8 million was primarily attributable to a decrease in site application, zoning and permitting and structural analysis services.

Nine Months Ended September 30, 2022

U.S. & Canada property segment revenue growth of $39.3 million was attributable to:

• An increase of $33.4 million in other revenue, which includes a $25.4 million increase due to straight-line accounting; and

• Tenant billings growth of $6.1 million, which was driven by:

• $105.5 million due to colocations and amendments;

• Partially offset by:

• A decrease of $95.1 million resulting from churn in excess of contractual escalations (as discussed above, we expect that our churn rate will be elevated for a period of several years due to the terms of the T-Mobile MLA);

• A decrease of $4.2 million from other tenant billings; and

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• A decrease of $0.1 million generated from newly acquired or constructed sites, which includes the impact of the disposition of certain operations acquired in connection with the InSite Acquisition;

Segment revenue growth was not meaningfully impacted by foreign currency translation related to fluctuations in CAD.

Asia-Pacific property segment revenue decrease of $47.4 million was attributable to:

• A decrease of $34.3 million in other revenue, primarily due to revenue reserves of $26.1 million related to the VIL Shortfall; and

• A decrease of $2.6 million in pass-through revenue, primarily due to revenue reserves of $22.2 million related to the VIL Shortfall, partially offset by an increase in fuel prices;

• Partially offset by tenant billings growth of $29.5 million, which was driven by:

• $28.0 million due to colocations and amendments; and

• $17.2 million generated from newly acquired or constructed sites;

• Partially offset by:

• A decrease of $14.9 million resulting from churn in excess of contractual escalations; and

• A decrease of $0.8 million from other tenant billings.

Segment revenue decline included a decrease of $40.0 million attributable to the negative impact of foreign currency translation related to fluctuations in INR.

Africa property segment revenue growth of $115.6 million was attributable to:

• An increase of $121.2 million in pass-through revenue, primarily due to an increase in fuel prices;

• Tenant billings growth of $78.0 million, which was driven by:

• $41.1 million due to colocations and amendments;

• $34.5 million generated from newly acquired or constructed sites;

• $2.1 million from contractual escalations, net of churn; and

• $0.3 million from other tenant billings;

• Partially offset by a decrease of $14.9 million in other revenue, primarily due to an increase in revenue reserves.

Segment revenue growth included a decrease of $68.7 million, attributable to the impact of foreign currency translation, which included, among others, negative impacts of $34.9 million related to fluctuations in GHS, $10.5 million related to fluctuations in ZAR, $7.6 million related to fluctuations in NGN, $7.4 million related to fluctuations in CFA and $6.1 million related to fluctuations in Kenyan Shilling.

Europe property segment revenue growth of $253.1 million was attributable to:

• Tenant billings growth of $175.8 million, which was driven by:

• $155.2 million generated from newly acquired or constructed sites, primarily attributable to the Telxius Acquisition and our agreements with Orange;

• $11.0 million resulting from contractual escalations, net of churn;

• $9.4 million due to colocations and amendments; and

• $0.2 million from other tenant billings; and

• An increase of $128.3 million in pass-through revenue, primarily attributable to the Telxius Acquisition;

• Partially offset by a decrease of $4.8 million in other revenue.

Segment revenue growth included a decrease of $46.2 million primarily attributable to the negative impact of foreign currency translation related to fluctuations in EUR.

Latin America property segment revenue growth of $171.6 million was attributable to:

• Tenant billings growth of $91.2 million, which was driven by:

• $31.3 million from contractual escalations, net of churn;

• $31.1 million generated from newly acquired or constructed sites, primarily attributable to the Telxius Acquisition;

• $27.2 million due to colocations and amendments; and

• $1.6 million from other tenant billings;

• An increase of $60.1 million in pass-through revenue, primarily attributable to the Telxius Acquisition and increased pass-through ground rent costs in Brazil; and

• An increase of $25.3 million in other revenue as a result of tenant settlements in Mexico.

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Segment revenue growth included a decrease of $5.0 million, attributable to the impact of foreign currency translation, which included, among others, negative impacts of $10.8 million related to fluctuations in CLP, and $8.2 million related to fluctuations in COP, partially offset by a positive impact of $16.9 million related to fluctuations in Brazilian Real.

Data Centers segment revenue growth of $561.4 million was attributable to data centers acquired in the fourth quarter of 2021, including through the CoreSite Acquisition.

Services segment revenue growth was $0.8 million.

Gross Margin

	Three Months Ended September 30,				Percent Increase (Decrease)		Nine Months Ended September 30,				Percent Increase (Decrease)
	2022		2021				2022		2021
Property
U.S. & Canada	$	1,040.2	$	1,008.3	3	%	$	3,096.1	$	3,060.2	1	%
Asia-Pacific	77.4		126.4		(39)		317.1		346.7		(9)
Africa	183.6		169.2		9		527.3		486.3		8
Europe	101.0		102.8		(2)		310.7		197.5		57
Latin America	288.9		267.3		8		869.9		756.3		15
Data Centers	110.0		1.5		7,233		329.8		4.6		7,070
Total property	1,801.1		1,675.5		7		5,450.9		4,851.6		12
Services	33.9		54.5		(38)	%	96.4		113.6		(15)	%

Three Months Ended September 30, 2022

•The increase in U.S. & Canada property segment gross margin was primarily attributable to the increase in revenue described above and a decrease in direct expenses of $1.2 million.

•The decrease in Asia-Pacific property segment gross margin was primarily attributable to the decrease in revenue described above, partially offset by a decrease in direct expenses of $2.5 million. Direct expenses also benefited by $12.8 million from the impact of foreign currency translation.

•The increase in Africa property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $46.5 million, primarily due to an increase in costs associated with pass-through revenue, including fuel costs. Direct expenses also benefited by $14.9 million from the impact of foreign currency translation.

•The decrease in Europe property segment gross margin was primarily attributable to an increase in direct expenses of $24.0 million, primarily due to an increase in costs associated with pass-through revenue, including energy and land rent costs, partially offset by the increase in revenue described above. Direct expenses also benefited by $14.0 million from the impact of foreign currency translation.

•The increase in Latin America property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $11.4 million, primarily due to an increase in costs associated with pass-through revenue, including land rent costs. Direct expenses also benefited by $3.6 million from the impact of foreign currency translation.

•The increase in Data Centers segment gross margin was attributable to data centers acquired in the fourth quarter of 2021, including through the CoreSite Acquisition.

•The decrease in Services segment gross margin was primarily due to the decrease in revenue described above, partially offset by a decrease in direct expenses of $3.2 million.

Nine Months Ended September 30, 2022

•The increase in U.S. & Canada property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $3.4 million.

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•The decrease in Asia-Pacific property segment gross margin was primarily attributable to the decrease in revenue described above and an increase in direct expenses of $8.4 million. Direct expenses also benefited by $26.2 million from the impact of foreign currency translation.

•The increase in Africa property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $103.1 million, primarily due to an increase in costs associated with pass-through revenue, including fuel costs. Direct expenses also benefited by $28.5 million from the impact of foreign currency translation.

•The increase in Europe property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $159.1 million, primarily due to the Telxius Acquisition. Direct expenses also benefited by $19.2 million from the impact of foreign currency translation.

•The increase in Latin America property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $60.8 million, primarily due to the Telxius Acquisition. Direct expenses also benefited by $2.8 million from the impact of foreign currency translation.

•The increase in Data Centers segment gross margin was attributable to data centers acquired in the fourth quarter of 2021, including through the CoreSite Acquisition.

•The decrease in Services segment gross margin was primarily due to an increase in direct expenses of $18.0 million.

Selling, General, Administrative and Development Expense (“SG&A”)

	Three Months Ended September 30,				Percent Increase (Decrease)		Nine Months Ended September 30,				Percent Increase (Decrease)
	2022		2021				2022		2021
Property
U.S. & Canada	$	48.0	$	47.0	2	%	$	134.3	$	126.4	6	%
Asia-Pacific	10.9		21.5		(49)		64.9		52.7		23
Africa	19.4		16.5		18		63.9		52.9		21
Europe	12.4		12.8		(3)		41.4		26.3		57
Latin America	26.7		26.3		2		81.4		79.6		2
Data Centers	15.8		1.1		1,336		47.7		3.4		1,303
Total property	133.2		125.2		6		433.6		341.3		27
Services	5.5		3.8		45		16.6		12.1		37
Other	92.5		76.9		20		297.8		242.3		23
Total selling, general, administrative and development expense	$	231.2	$	205.9	12	%	$	748.0	$	595.7	26	%

Three Months Ended September 30, 2022

•The increases in our U.S. & Canada property segment SG&A and Services segment SG&A were primarily driven by increased personnel costs to support our business.

•The decrease in our Asia-Pacific property segment SG&A was primarily driven by a net decrease in bad debt expense of $7.8 million due to the reversal of bad debt expense for amounts previously reserved related to a tenant in India. During the three months ended September 30, 2022, the impact of the VIL Shortfall is reflected in revenue reserves as described above.

•The increase in our Africa property segment SG&A was primarily driven by an increase in bad debt expense of $4.4 million.

•Our Europe property segment SG&A was relatively consistent as compared to the prior-year period.

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•The increase in our Latin America property segment SG&A was primarily driven by increased personnel costs to support our business, partially offset by a decrease in bad debt expense of $3.4 million.

•The increase in our Data Centers segment SG&A was attributable to data centers acquired in the fourth quarter of 2021, including through the CoreSite Acquisition.

•The increase in other SG&A was primarily attributable to an increase in stock-based compensation expense of $11.1 million, including expense associated with certain equity awards related to the CoreSite Acquisition, and an increase in corporate SG&A, including an increase in personnel costs to support our business.

Nine Months Ended September 30, 2022

•The increases in our U.S. & Canada and Europe property segment SG&A and Services segment SG&A were primarily driven by increased personnel costs to support our business, including as a result of the Telxius Acquisition in Europe.

•The increase in our Asia-Pacific property segment SG&A was primarily driven by a net increase in bad debt expense of $16.2 million.

•The increase in our Africa property segment SG&A was primarily driven by increased personnel costs to support our business and an increase in bad debt expense of $4.8 million.

•The increase in our Latin America property segment SG&A was primarily driven by increased personnel costs to support our business, including as a result of the Telxius Acquisition, partially offset by a decrease in bad debt expense of $10.4 million.

•The increase in our Data Centers segment SG&A was attributable to data centers acquired in the fourth quarter of 2021, including through the CoreSite Acquisition.

•The increase in other SG&A was primarily attributable to an increase in stock-based compensation expense of $40.1 million, including expense associated with certain equity awards related to the CoreSite Acquisition, and an increase in corporate SG&A, including an increase in personnel costs to support our business.

Operating Profit

	Three Months Ended September 30,				Percent Increase (Decrease)		Nine Months Ended September 30,				Percent Increase (Decrease)
	2022		2021				2022		2021
Property
U.S. & Canada	$	992.2	$	961.3	3	%	$	2,961.8	$	2,933.8	1	%
Asia-Pacific	66.5		104.9		(37)		252.2		294.0		(14)
Africa	164.2		152.7		8		463.4		433.4		7
Europe	88.6		90.0		(2)		269.3		171.2		57
Latin America	262.2		241.0		9		788.5		676.7		17
Data Centers	94.2		0.4		23,450		282.1		1.2		23,408
Total property	1,667.9		1,550.3		8		5,017.3		4,510.3		11
Services	28.4		50.7		(44)	%	79.8		101.5		(21)	%

•The increases in operating profit for the three and nine months ended September 30, 2022 for our U.S. & Canada, Africa and Latin America property segments were primarily attributable to increases in our segment gross margin, partially offset by increases in our segment SG&A.

•The decrease in operating profit for the three months ended September 30, 2022 for our Asia-Pacific property segment was primarily attributable to a decrease in our segment gross margin, partially offset by a decrease in our segment SG&A. The decrease in operating profit for the nine months ended September 30, 2022 for our Asia-Pacific property segment was primarily attributable to a decrease in our segment gross margin and an increase in our segment SG&A.

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•The decrease in operating profit for the three months ended September 30, 2022 for our Europe property segment was primarily attributable to a decrease in our segment gross margin, partially offset by a decrease in our segment SG&A. The increase in operating profit for the nine months ended September 30, 2022 for our Europe property segment was primarily attributable to an increase in our segment gross margin, partially offset by an increase in our segment SG&A.

•The increase in operating profit for the three and nine months ended September 30, 2022 for our Data Centers segment was attributable to data centers acquired in the fourth quarter of 2021, including through the CoreSite Acquisition.

•The decreases in operating profit for the three and nine months ended September 30, 2022 for our Services segment were primarily attributable to decreases in our segment gross margin and increases in our segment SG&A.

Depreciation, Amortization and Accretion

	Three Months Ended September 30,				Percent Increase (Decrease)		Nine Months Ended September 30,				Percent Increase (Decrease)
	2022		2021				2022		2021
Depreciation, amortization and accretion	$	898.1	$	611.4	47	%	$	2,540.4	$	1,688.7	50	%

The increases in depreciation, amortization and accretion expense for the three and nine months ended September 30, 2022 were primarily attributable to the acquisition, lease or construction of new sites since the beginning of the prior-year periods, including due to the Telxius Acquisition and the CoreSite Acquisition, which resulted in increases in property and equipment and intangible assets subject to amortization, partially offset by foreign currency exchange rate fluctuations.

Other Operating Expenses

	Three Months Ended September 30,				Percent Increase (Decrease)		Nine Months Ended September 30,				Percent Increase (Decrease)
	2022		2021				2022		2021
Other operating expenses	$	52.8	$	85.2	(38)	%	$	98.6	$	175.4	(44)	%

The decrease in other operating expenses during the three months ended September 30, 2022 was primarily attributable to a decrease in impairment charges of $41.0 million, partially offset by an increase in integration and acquisition related costs, including pre-acquisition contingencies and settlements, of $6.6 million, primarily associated with the Stonepeak Transaction (as defined and as further discussed below). The decrease in other operating expenses during the nine months ended September 30, 2022 was primarily attributable a decrease in integration and acquisition related costs, including pre-acquisition contingencies and settlements, of $48.8 million and a decrease in impairment charges of $31.9 million.

Total Other (Income) Expense

	Three Months Ended September 30,				Percent Increase (Decrease)		Nine Months Ended September 30,				Percent Increase (Decrease)
	2022		2021				2022		2021
Total other (income) expense	$	(202.9)	$	49.9	(507)	%	$	(319.0)	$	204.5	(256)	%

Total other (income) expense consists primarily of interest expense and realized and unrealized foreign currency gains and losses. We record unrealized foreign currency gains or losses as a result of foreign currency exchange rate fluctuations primarily associated with our intercompany notes and similar unaffiliated balances denominated in a currency other than the subsidiaries’ functional currencies.

The change in total other (income) expense during the three months ended September 30, 2022 was primarily due to an increase in foreign currency gains of $294.0 million, partially offset by increases in net interest expense of $58.5 million, primarily due to increases in our weighted average interest rate and our average debt outstanding. The change in total other (income) expense during the nine months ended September 30, 2022 was primarily due to an increase in foreign currency gains of $689.2 million and a decrease in loss on retirement of debt of $25.3 million attributable to the repayment of all amounts outstanding under the securitizations assumed in connection with the InSite Acquisition (the

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“InSite Debt”) in the prior-year period, partially offset by increases in net interest expense of $171.6 million, primarily due to an increase in our weighted average debt outstanding.

Income Tax Provision

	Three Months Ended September 30,						Percent Increase (Decrease)		Nine Months Ended September 30,						Percent Increase (Decrease)
	2022			2021					2022			2021
Income tax provision	$	36.1		$	51.4		(30)	%	$	66.0		$	174.5		(62)	%
Effective tax rate	4.2		%	6.6		%			2.7		%	7.6		%

As a real estate investment trust for U.S. federal income tax purposes (“REIT”), we may deduct earnings distributed to stockholders against the income generated by our REIT operations. In addition, we are able to offset certain income by utilizing our net operating losses (“NOLs”), subject to specified limitations. Consequently, the effective tax rate on income from continuing operations for each of the nine months ended September 30, 2022 and 2021 differs from the federal statutory rate.

The decreases in the income tax provision during the three and nine months ended September 30, 2022 were primarily attributable to fewer additions to reserves for our existing tax positions and reduced earnings in certain foreign jurisdictions. The decrease in the income tax provision during the nine months ended September 30, 2022 also included the reversal of valuation allowances of $79.7 million in certain jurisdictions, as compared to a reversal of $8.8 million during the nine months ended September 30, 2021.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.

Net Income / Adjusted EBITDA and Net Income / Nareit FFO attributable to American Tower Corporation common stockholders / Consolidated AFFO / AFFO attributable to American Tower Corporation common stockholders 

	Three Months Ended September 30,				Percent Increase (Decrease)		Nine Months Ended September 30,				Percent Increase (Decrease)
	2022		2021				2022		2021
Net income	$	819.7	$	726.2	13	%	$	2,413.3	$	2,126.4	13	%
Income tax provision	36.1		51.4		(30)		66.0		174.5		(62)
Other income	(478.5)		(166.8)		187		(1,109.4)		(439.6)		152
Loss on retirement of long-term obligations	0.4		—		100		0.4		25.7		(98)
Interest expense	294.0		226.1		30		833.0		646.8		29
Interest income	(18.8)		(9.4)		100		(43.0)		(28.4)		51
Other operating expenses	52.8		85.2		(38)		98.6		175.4		(44)
Depreciation, amortization and accretion	898.1		611.4		47		2,540.4		1,688.7		50
Stock-based compensation expense	39.2		28.1		40		138.1		98.0		41
Adjusted EBITDA	$	1,643.0	$	1,552.2	6	%	$	4,937.4	$	4,467.5	11	%

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	Three Months Ended September 30,				Percent Increase (Decrease)		Nine Months Ended September 30,				Percent Increase (Decrease)
	2022		2021				2022		2021
Net income	$	819.7	$	726.2	13	%	$	2,413.3	$	2,126.4	13	%
Real estate related depreciation, amortization and accretion	834.6		550.2		52		2,356.1		1,516.7		55
Losses from sale or disposal of real estate and real estate related impairment charges (1)	14.8		55.4		(73)		32.9		64.9		(49)
Dividends to noncontrolling interests (2)	(8.7)		—		100		(8.7)		—		100
Adjustments for unconsolidated affiliates and noncontrolling interests	(43.0)		(23.5)		83		(127.1)		(59.7)		113
Nareit FFO attributable to American Tower Corporation common stockholders	$	1,617.4	$	1,308.3	24	%	$	4,666.5	$	3,648.3	28	%
Straight-line revenue	(127.7)		(99.6)		28		(350.4)		(324.3)		8
Straight-line expense	9.4		13.0		(28)		30.7		43.4		(29)
Stock-based compensation expense	39.2		28.1		40		138.1		98.0		41
Deferred portion of income tax and other income tax adjustments	(27.0)		(7.5)		260		(178.5)		53.4		(434)
GTP one-time cash tax settlement (3)	—		—		—		46.6		—		100
Non-real estate related depreciation, amortization and accretion	63.5		61.2		4		184.3		172.0		7
Amortization of deferred financing costs, capitalized interest, debt discounts and premiums and long-term deferred interest charges	12.2		9.7		26		35.7		27.4		30
Other income (4)	(478.5)		(166.8)		187		(1,109.4)		(439.6)		152
Loss on retirement of long-term obligations	0.4		—		100		0.4		25.7		(98)
Other operating expense (5)	38.0		29.8		28		65.7		110.5		(41)
Capital improvement capital expenditures	(43.1)		(40.4)		7		(111.5)		(93.8)		19
Corporate capital expenditures	(3.3)		(1.5)		120		(7.3)		(3.7)		97
Adjustments for unconsolidated affiliates and noncontrolling interests	43.0		23.5		83		127.1		59.7		113
Consolidated AFFO	$	1,143.5	$	1,157.8	(1)	%	$	3,538.0	$	3,377.0	5	%
Adjustments for unconsolidated affiliates and noncontrolling interests (6)	(41.9)		(18.7)		124	%	(114.1)		(58.6)		95	%
AFFO attributable to American Tower Corporation common stockholders	$	1,101.6	$	1,139.1	(3)	%	$	3,423.9	$	3,318.4	3	%

_______________

(1)Included in these amounts are impairment charges of $6.1 million, $47.1 million, $14.4 million and $46.3 million, respectively.

(2)For the three and nine months ended September 30, 2022, primarily includes $5.5 million of distributions payable related to the outstanding Stonepeak mandatorily convertible preferred equity.

(3)In 2015, we incurred charges in connection with certain tax elections wherein MIP Tower Holdings LLC, parent company to Global Tower Partners (“GTP”), would no longer operate as a separate REIT for federal and state income tax purposes. We finalized a settlement related to this tax election in the nine month period ended September 30, 2022. We believe that these related transactions are nonrecurring, and do not believe it is an indication of our operating performance. Accordingly, we believe it is more meaningful to present Consolidated AFFO excluding these amounts.

(4)Includes gains on foreign currency exchange rate fluctuations of $474.5 million, $180.5 million, $1.1 billion and $422.1 million, respectively.

(5)Primarily includes acquisition-related costs and integration costs. 

(6)Includes adjustments for the impact on both Nareit FFO attributable to American Tower Corporation common stockholders as well as the other line items included in the calculation of Consolidated AFFO.

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The increases in net income for the three and nine months ended September 30, 2022 were primarily due to (i) increases in gains on foreign currency exchange rate fluctuations, (ii) increases in our operating profit and (iii) decreases in the income tax provision, partially offset by (a) increases in depreciation, amortization and accretion expense and (b) increases in interest expense. Net income for the nine months ended September 30, 2021 included a loss on retirement of long-term obligations of $25.7 million, attributable to the repayment of the InSite Debt.

The increases in Adjusted EBITDA for the three and nine months ended September 30, 2022 were primarily attributable to increases in our gross margin, partially offset by increases in SG&A, excluding the impact of stock-based compensation expense of $14.2 million and $112.2 million, respectively.

The decrease in Consolidated AFFO and AFFO attributable to American Tower Corporation common stockholders for the three months ended September 30, 2022 was primarily attributable to (i) increases in cash paid for taxes and cash paid for interest and (ii) an increase in dividends to noncontrolling interests, including $5.5 million of distributions payable related to the outstanding Stonepeak mandatorily convertible preferred equity, partially offset by an increase in our operating profit, excluding the impact of straight-line accounting. The decrease in AFFO attributable to American Tower Corporation common stockholders was also impacted by changes in noncontrolling interests held in Data Centers, Europe and Asia-Pacific since the beginning of the prior-year period.

The growth in Consolidated AFFO and AFFO attributable to American Tower Corporation common stockholders for the nine months ended September 30, 2022 was primarily attributable to the increase in our operating profit, excluding the impact of straight-line accounting, partially offset by (i) increases in cash paid for taxes and cash paid for interest, (ii) an increase in capital improvement capital expenditures and (iii) an increase in dividends to noncontrolling interests, including $5.5 million of distributions payable related to the outstanding Stonepeak mandatorily convertible preferred equity. The growth in AFFO attributable to American Tower Corporation common stockholders was also impacted by changes in noncontrolling interests held in Data Centers, Europe and Asia-Pacific since the beginning of the prior-year period.

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Liquidity and Capital Resources

The information in this section updates as of September 30, 2022 the “Liquidity and Capital Resources” section of the 2021 Form 10-K and should be read in conjunction with that report.

Overview

During the nine months ended September 30, 2022, our significant financing transactions included:

•Repayment of debt assumed in connection with the CoreSite Acquisition, including senior unsecured notes previously entered into by CoreSite (the “CoreSite Debt”).

•Redemption of our 2.250% senior unsecured notes due 2022 (the “2.250% Notes”) upon their maturity.

•Registered public offering in an aggregate amount of $1.3 billion of senior unsecured notes with maturities in 2027 and 2032.

•Registered public offering of 9,185,000 shares of our common stock for aggregate net proceeds of $2.3 billion.

•The Stonepeak Transaction (as defined and further discussed below) pursuant to which we received $2.5 billion.

•Repayment of all amounts outstanding under the 2021 USD 364-Day Delayed Draw Term Loan (as defined below).

As a holding company, our cash flows are derived primarily from the operations of, and distributions from, our operating subsidiaries or funds raised through borrowings under our credit facilities and debt or equity offerings.

The following table summarizes the significant components of our liquidity (in millions):

	As of September 30, 2022
Available under the 2021 Multicurrency Credit Facility	$	1,605.7
Available under the 2021 Credit Facility	3,295.0
Letters of credit	(28.2)
Total available under credit facilities, net	$	4,872.5
Cash and cash equivalents	2,121.8
Total liquidity	$	6,994.3

Subsequent to September 30, 2022, we made additional repayments of $25.0 million under the 2021 Credit Facility (as defined below) and $570.0 million under the 2021 Multicurrency Credit Facility (as defined below), including repayments as a result of our agreement with Stonepeak in October 2022 (as further discussed below), and borrowings of $650.0 million under the 2021 Credit Facility.

Summary cash flow information is set forth below (in millions):

	Nine Months Ended September 30,
	2022		2021
Net cash provided by (used for):
Operating activities	$	2,511.2	$	4,141.0
Investing activities	(1,506.2)		(10,524.5)
Financing activities	(960.5)		8,282.8
Net effect of changes in foreign currency exchange rates on cash and cash equivalents, and restricted cash	(138.2)		(61.4)
Net (decrease) increase in cash and cash equivalents, and restricted cash	$	(93.7)	$	1,837.9

We use our cash flows to fund our operations and investments in our business, including maintenance and improvements, communications site construction, managed network installations and acquisitions. Additionally, we use our cash flows to make distributions, including distributions of our REIT taxable income to maintain our qualification for taxation as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). We may also repay or repurchase our existing indebtedness or equity from time to time. We typically fund our international expansion efforts primarily through a combination of cash on hand, intercompany debt and equity contributions.

As of September 30, 2022, we had total outstanding indebtedness of $38.6 billion, with a current portion of $3.0 billion. During the nine months ended September 30, 2022, we generated sufficient cash flow from operations, together with borrowings under our credit facilities, proceeds from our equity and debt issuances and cash on hand, to fund our

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acquisitions, capital expenditures and debt service obligations, as well as our required distributions. We believe the cash generated by operating activities during the year ending December 31, 2022, together with our borrowing capacity under our credit facilities, will be sufficient to fund our required distributions, capital expenditures, debt service obligations (interest and principal repayments) and signed acquisitions.     

Material Cash Requirements— There were no material changes to the Material Cash Requirements section of the 2021 Form 10-K.

As of September 30, 2022, we had $1.8 billion of cash and cash equivalents held by our foreign subsidiaries. As of September 30, 2022, we had $268.3 million of cash and cash equivalents held by our joint ventures, of which $218.3 million was held by our foreign joint ventures. While certain subsidiaries may pay us interest or principal on intercompany debt, it has not been our practice to repatriate earnings from our foreign subsidiaries primarily due to our ongoing expansion efforts and related capital needs. However, in the event that we do repatriate any funds, we may be required to accrue and pay certain taxes.

Cash Flows from Operating Activities

The decrease in cash provided by operating activities for the nine months ended September 30, 2022 was primarily attributable to changes in unearned revenue and increases in cash paid for interest and cash paid for taxes, partially offset by an increase in the operating profit of our U.S & Canada, Africa, Europe, Latin America and Data Centers property segments.

Cash Flows from Investing Activities

Our significant investing activities during the nine months ended September 30, 2022 are highlighted below:

•We spent $359.1 million for acquisitions, including payments made for acquisitions completed in 2021.

•We spent $1,236.3 million for capital expenditures, as follows (in millions):

Discretionary capital projects (1)	$	545.9
Ground lease purchases (2)	146.3
Capital improvements and corporate expenditures (3)	118.8
Redevelopment	277.5
Start-up capital projects	147.8
Total capital expenditures (4)	$	1,236.3

_______________

(1)Includes the construction of 4,539 communications sites globally.

(2)Includes $27.6 million of perpetual land easement payments reported in Deferred financing costs and other financing activities in the cash flows from financing activities in our condensed consolidated statements of cash flows.

(3)Includes $4.7 million of finance lease payments reported in Repayments of notes payable, credit facilities, senior notes, secured debt, term loan and finance leases in the cash flows from financing activities in our condensed consolidated statements of cash flows.

(4)Net of purchase credits of $11.4 million on certain assets, which are recorded in investing activities in our condensed consolidated statements of cash flows.

We plan to continue to allocate our available capital, after satisfying our distribution requirements, among investment alternatives that meet our return on investment criteria, while maintaining our commitment to our long-term financial policies. Accordingly, we expect to continue to deploy capital through our annual capital expenditure program, including land purchases and new site and data center facility construction, and through acquisitions. We also regularly review our portfolios as to capital expenditures required to upgrade our infrastructure to our structural standards or address capacity, structural or permitting issues. 

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We expect that our 2022 total capital expenditures will be as follows (in millions):

Discretionary capital projects (1)	$	835	to	$	865
Ground lease purchases	$	180	to	$	200
Capital improvements and corporate expenditures	$	170	to	$	180
Redevelopment	$	440	to	$	460
Start-up capital projects	$	270	to	$	290
Total capital expenditures	$	1,895	to	$	1,995

_______________

(1)Includes the construction of approximately 6,000 to 7,000 communications sites globally.

Cash Flows from Financing Activities

Our significant financing activities were as follows (in millions):

	Nine Months Ended September 30,
	2022		2021
Proceeds from issuance of senior notes, net	$	1,293.6	$	5,609.4
Proceeds from issuance of common stock, net	2,291.7		2,361.8
Repayments of credit facilities, net	(535.0)		(559.0)
Proceeds from term loans	—		2,347.0
Repayments of term loan	(3,000.0)		(1,744.2)
Repayment of securitized debt (1)	—		(763.5)
Repayments of senior notes (2)	(1,555.1)		—
Contributions from noncontrolling interest holders (3)	2,548.5		3,078.2
Distributions to noncontrolling interest holders (4)	(3.2)		(223.1)
Purchase of redeemable noncontrolling interest (5)	—		(2.5)
Distributions paid on common stock	(1,945.9)		(1,674.4)

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(1)During the nine months ended September 30, 2021, we repaid all amounts outstanding under the InSite Debt.

(2)Includes the CoreSite Debt, which, as of December 31, 2021, included $875.0 million aggregate principal amount and a fair value adjustment of $80.1 million. During the nine months ended September 30, 2022, we repaid all amounts outstanding under the CoreSite Debt.

(3)For the nine months ended September 30, 2022, includes $2.5 billion of contributions received from Stonepeak in connection with the Stonepeak Transaction (as further discussed below). For the nine months ended September 30, 2021, includes $3.1 billion of contributions received from 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 noncontrolling interests in subsidiaries whose holdings consist of our operations in France, Germany, Poland and Spain (such subsidiaries collectively, “ATC Europe”) (the “ATC Europe Transactions”).

(4)For the nine months ended September 30, 2021, includes $214.9 million of cash consideration paid to PGGM in connection with the reorganization of our subsidiaries in Europe.

(5)During the nine months ended September 30, 2021, we liquidated our interests in a company held in France for total consideration of 2.2 million EUR (approximately $2.5 million at the date of redemption).

Repayment of 2.250% Senior Notes—On January 14, 2022, we repaid $600.0 million aggregate principal amount of 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, we 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. We 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.

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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

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(1)Accrued and unpaid interest on U.S. Dollar (“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)We 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 we redeem the Notes on or after the par call date, we will not be required to pay a make-whole premium.

If we undergo a change of control and corresponding ratings decline, each as defined in the supplemental indenture for the Notes, we 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 our other senior unsecured debt and are structurally subordinated to all existing and future indebtedness and other obligations of our subsidiaries.

The supplemental indenture contains certain covenants that restrict our ability to merge, consolidate or sell assets and our (together with our subsidiaries’) ability to incur liens. These covenants are subject to a number of exceptions, including that we and our 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.

Repayment of CoreSite Debt—On January 7, 2022, we 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.

2021 Multicurrency Credit Facility—During the nine months ended September 30, 2022, we borrowed an aggregate of $850.0 million and repaid an aggregate of $680.0 million of revolving indebtedness under our $6.0 billion senior unsecured multicurrency revolving credit facility, as amended and restated in December 2021 (the “2021 Multicurrency Credit Facility”). We used the borrowings to repay outstanding indebtedness, including the CoreSite Debt, and for general corporate purposes. We currently have $3.5 million of undrawn letters of credit and maintain the ability to draw down and repay amounts under the 2021 Multicurrency Credit Facility in the ordinary course.

2021 Credit Facility—During the nine months ended September 30, 2022, we borrowed an aggregate of $2.7 billion and repaid an aggregate of $3.4 billion of revolving indebtedness under our $4.0 billion senior unsecured revolving credit facility, as amended and restated in December 2021 (the “2021 Credit Facility”). We used the borrowings to repay outstanding indebtedness, including the 2.250% Notes, and for general corporate purposes. We currently have $24.7 million of undrawn letters of credit and maintain the ability to draw down and repay amounts under the 2021 Credit Facility in the ordinary course.

Repayments under the 2021 USD 364-Day Delayed Draw Term Loan—On April 6, 2022, we repaid $100.0 million of indebtedness under our $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, we 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 below) and cash on hand. On August 11, 2022, we repaid all remaining amounts outstanding under the 2021 USD 364-Day Delayed Draw Term Loan using proceeds from the Stonepeak Transaction (as further discussed below).

As of September 30, 2022, the key terms under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, our $1.0 billion unsecured term loan, as amended and restated in December 2021 (the “2021 Term Loan”), our 825.0 million EUR unsecured term loan, as amended and restated in December 2021 (the “2021 EUR Three Year Delayed Draw Term

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Loan”) and our $1.5 billion unsecured term loan entered into in December 2021 (the “2021 USD Two Year Delayed Draw Term Loan”) were as follows:

Bank Facility		Outstanding Principal Balance ($ in millions)		Maturity Date		LIBOR or EURIBOR borrowing interest rate range (1)	Base rate borrowing interest rate range (1)	Current margin over LIBOR or EURIBOR and the base rate, respectively
2021 Multicurrency Credit Facility	(2)	$	4,394.3	June 30, 2025	(3)	0.875% - 1.750%	0.000% - 0.750%	1.125% and 0.125%
2021 Credit Facility	(4)	705.0		January 31, 2027	(3)	0.875% - 1.750%	0.000% - 0.750%	1.125% and 0.125%
2021 Term Loan	(4)	1,000.0		January 31, 2027		0.875% - 1.750%	0.000% - 0.750%	1.125% and 0.125%
2021 EUR Three Year Delayed Draw Term Loan	(5)	808.7		May 28, 2024		0.875% - 1.625%	0.000% - 0.625%	1.125% and 0.125%
2021 USD Two Year Delayed Draw Term Loan	(4)	1,500.0		December 28, 2023		0.875% - 1.750%	0.000% - 0.750%	1.125% and 0.125%

___________

(1)Represents interest rate above the London Interbank Offered Rate (“LIBOR”) for LIBOR based borrowings, interest rate above Euro Interbank Offer Rate (“EURIBOR”) for EURIBOR based borrowings and interest rate above the defined base rate for base rate borrowings, in each case based on our debt ratings.

(2)Currently borrowed at LIBOR for USD denominated borrowings and at EURIBOR for EUR denominated borrowings.

(3)Subject to two optional renewal periods.

(4)Currently borrowed at LIBOR.

(5)Currently borrowed at EURIBOR.

We must pay a quarterly commitment fee on the undrawn portion of each of the 2021 Multicurrency Credit Facility and the 2021 Credit Facility. The commitment fee for the 2021 Multicurrency Credit Facility and the 2021 Credit Facility ranges from 0.080% to 0.300% per annum, based upon our debt ratings, and is currently 0.110%.

The 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the 2021 Term Loan, the 2021 EUR Three Year Delayed Draw Term Loan and the 2021 USD Two Year Delayed Draw Term Loan do not require amortization of principal and may be paid prior to maturity in whole or in part at our option without penalty or premium. We have the option of choosing either a defined base rate, LIBOR or EURIBOR as the applicable base rate for borrowings under these bank facilities.

The loan agreements for each of the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the 2021 Term Loan, the 2021 EUR Three Year Delayed Draw Term Loan and the 2021 USD Two Year Delayed Draw Term Loan contain certain reporting, information, financial and operating covenants and other restrictions (including limitations on additional debt, guaranties, sales of assets and liens) with which we must comply. Failure to comply with the financial and operating covenants of the loan agreements could not only prevent us from being able to borrow additional funds under the revolving credit facilities, but may constitute a default, which could result in, among other things, the amounts outstanding under the applicable agreement, including all accrued interest and unpaid fees, becoming immediately due and payable.

Nigeria Letters of Credit—During the nine months ended September 30, 2022, we drew on letters of credit in Nigeria. The drawn amounts bear interest at a rate equal to the Secured Overnight Financing Rate at the time of drawing plus a spread. Amounts are due 270 days from the date of drawing. As of September 30, 2022, we had $13.0 million outstanding under the drawn letters of credit.

Stonepeak Transaction—In July 2022, in connection with the funding of the CoreSite Acquisition, we entered into an agreement with certain investment vehicles affiliated with Stonepeak Partners LP (such investment vehicles, collectively, “Stonepeak”) for Stonepeak to acquire a 29% noncontrolling ownership interest in the our U.S. data center business. The transaction was completed in August 2022 for total aggregate consideration of $2.5 billion, through an investment in common equity and mandatorily convertible preferred equity (the “Stonepeak Transaction”). We expect to pay distributions related to the outstanding common equity and mandatorily convertible preferred equity.

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In October 2022, we entered into an agreement with Stonepeak for Stonepeak to acquire additional common equity and mandatorily preferred equity interests in our U.S. data center business for total aggregate consideration of $570.0 million. The transaction was completed on October 20, 2022. We used the proceeds to repay existing indebtedness under the 2021 Multicurrency Credit Facility.

As of the date hereof, we hold a common equity interest of approximately 72% in our U.S. data center business, with Stonepeak holding approximately 28% of the outstanding common equity and 100% of the outstanding mandatorily convertible preferred equity. On a fully converted basis, which is expected to occur four years from the date of the initial closing in August 2022, and on the basis of the currently outstanding equity, we will hold a controlling ownership interest of approximately 64%, with Stonepeak holding approximately 36%. The mandatorily convertible preferred equity, which accrues dividends at 5.0%, will convert into common equity on a one for one basis, subject to adjustment that will be measured on the conversion date.

Stock Repurchase Programs—In March 2011, our Board of Directors approved a stock repurchase program, pursuant to which we are authorized to repurchase up to $1.5 billion of our common stock (the “2011 Buyback”). In December 2017, our Board of Directors approved an additional stock repurchase program, pursuant to which we are authorized to repurchase up to $2.0 billion of our common stock (the “2017 Buyback,” and, together with the 2011 Buyback, the “Buyback Programs”).

During the nine months ended September 30, 2022, there were no repurchases under either of the Buyback Programs.

We expect to continue managing the pacing of the remaining approximately $2.0 billion under the Buyback Programs in response to general market conditions and other relevant factors. We expect to fund any further repurchases of our common stock through a combination of cash on hand, cash generated by operations and borrowings under our credit facilities. Repurchases under the Buyback Programs are subject to, among other things, us having available cash to fund the repurchases.

Sales of Equity Securities—We receive proceeds from sales of our equity securities pursuant to our employee stock purchase plan (the “ESPP”) and upon exercise of stock options granted under our equity incentive plan. During the nine months ended September 30, 2022, we received an aggregate of $21.0 million in proceeds upon exercises of stock options and sales pursuant to the ESPP.

2020 “At the Market” Stock Offering Program—In August 2020, we established an “at the market” stock offering program through which we may issue and sell shares of our 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 our specific instructions, at negotiated prices. We intend 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 September 30, 2022, we have not sold any shares of common stock under the 2020 ATM Program.

Common Stock Offering—On June 7, 2022, we completed a registered public offering of 9,185,000 shares of our 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. We used the net proceeds to repay existing indebtedness under the 2021 USD 364-Day Delayed Draw Term Loan.

Distributions—As a REIT, we must annually distribute to our stockholders an amount equal to at least 90% of our REIT taxable income (determined before the deduction for distributed earnings and excluding any net capital gain). Generally, we have distributed, and expect to continue to distribute, all or substantially all of our REIT taxable income after taking into consideration our utilization of NOLs. We have distributed an aggregate of approximately $13.8 billion to our common stockholders, including the dividend paid in October 2022, primarily classified as ordinary income that may be treated as qualified REIT dividends under Section 199A of the Code for taxable years ending before 2026.

During the nine months ended September 30, 2022, we paid $4.22 per share, or $1.9 billion, to our common stockholders of record. In addition, we declared a distribution of $1.47 per share, or $684.4 million, paid on October 26, 2022 to our common stockholders of record at the close of business on October 11, 2022.

The amount, timing and frequency of future distributions will be at the sole discretion of our Board of Directors and will depend on various factors, a number of which may be beyond our control, including our financial condition and

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operating cash flows, the amount required to maintain our qualification for taxation as a REIT and reduce any income and excise taxes that we otherwise would be required to pay, limitations on distributions in our existing and future debt and preferred equity instruments, our ability to utilize NOLs to offset our distribution requirements, limitations on our ability to fund distributions using cash generated through our taxable REIT subsidiaries and other factors that our Board of Directors may deem relevant.

We accrue distributions on unvested restricted stock units, which are payable upon vesting. As of September 30, 2022, the amount accrued for distributions payable related to unvested restricted stock units was $13.5 million. During the nine months ended September 30, 2022, we paid $6.8 million of distributions upon the vesting of restricted stock units.

Factors Affecting Sources of Liquidity    

As discussed in the “Liquidity and Capital Resources” section of the 2021 Form 10-K, our liquidity depends on our ability to generate cash flow from operating activities, borrow funds under our credit facilities and maintain compliance with the contractual agreements governing our indebtedness. We believe that the debt agreements discussed below represent our material debt agreements that contain covenants, our compliance with which would be material to an investor’s understanding of our financial results and the impact of those results on our liquidity.

Restrictions Under Loan Agreements Relating to Our Credit Facilities—The loan agreements for the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the 2021 Term Loan, the 2021 EUR Three Year Delayed Draw Term Loan and the 2021 USD Two Year Delayed Draw Term Loan contain certain financial and operating covenants and other restrictions applicable to us and our subsidiaries that are not designated as unrestricted subsidiaries on a consolidated basis. These restrictions include limitations on additional debt, distributions and dividends, guaranties, sales of assets and liens. The loan agreements also contain covenants that establish financial tests with which we and our restricted subsidiaries must comply related to total leverage and senior secured leverage, as set forth in the table below. As of September 30, 2022, we were in compliance with each of these covenants.

		Compliance Tests For The 12 Months Ended September 30, 2022 ($ in billions)
	Ratio (1)	Additional Debt Capacity Under Covenants (2)	Capacity for Adjusted EBITDA Decrease Under Covenants (3)
Consolidated Total Leverage Ratio	Total Debt to Adjusted EBITDA ≤ 7.50:1.00	~ 10.9	~ 1.5
Consolidated Senior Secured Leverage Ratio	Senior Secured Debt to Adjusted EBITDA ≤ 3.00:1.00	~ 17.3 (4)	~ 5.8

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(1)Each component of the ratio as defined in the applicable loan agreement.

(2)Assumes no change to Adjusted EBITDA.

(3)Assumes no change to our debt levels.

(4)Effectively, however, additional Senior Secured Debt under this ratio would be limited to the capacity under the Consolidated Total Leverage Ratio.

Under the terms of the agreements for the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the 2021 Term Loan, the 2021 EUR Three Year Delayed Draw Term Loan and the 2021 USD Two Year Delayed Draw Term Loan, the Telxius Acquisition and the CoreSite Acquisition are designated as a Qualified Acquisitions, whereby our Total Debt to Adjusted EBITDA ratio was adjusted to not exceed 7.50 to 1.00 for four fiscal quarters following consummation of the Telxius Acquisition, which began with the quarter ended June 30, 2021, and for four fiscal quarters following consummation of the CoreSite Acquisition, which began with the quarter ended December 31, 2021. The loan agreements for our credit facilities also contain reporting and information covenants that require us to provide financial and operating information to the lenders within certain time periods. If we are unable to provide the required information on a timely basis, we would be in breach of these covenants.

Failure to comply with the financial maintenance tests and certain other covenants of the loan agreements for our credit facilities could not only prevent us from being able to borrow additional funds under these credit facilities, but may also constitute a default under these credit facilities, which could result in, among other things, the amounts outstanding, including all accrued interest and unpaid fees, becoming immediately due and payable. If this were to occur, we may not have sufficient cash on hand to repay such indebtedness. The key factors affecting our ability to comply with the debt covenants described above are our financial performance relative to the financial maintenance tests defined in the loan agreements for these credit facilities and our ability to fund our debt service obligations. Based upon our current

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expectations, we believe our operating results during the next 12 months will be sufficient to comply with these covenants.

Restrictions Under Agreements Relating to the 2015 Securitization and the Trust Securitizations—The indenture and related supplemental indenture governing the American Tower Secured Revenue Notes, Series 2015-2, Class A (the “Series 2015-2 Notes”) issued by GTP Acquisition Partners I, LLC (“GTP Acquisition Partners”) in a private securitization transaction in May 2015 (the “2015 Securitization”) and the loan agreement related to the securitization transactions completed in March 2013 (the “2013 Securitization”) and March 2018 (the “2018 Securitization” and, together with the 2013 Securitization, the “Trust Securitizations”) include certain financial ratios and operating covenants and other restrictions customary for transactions subject to rated securitizations. Among other things, GTP Acquisition Partners and American Tower Asset Sub, LLC and American Tower Asset Sub II, LLC (together, the “AMT Asset Subs”) are prohibited from incurring other indebtedness for borrowed money or further encumbering their assets, subject to customary carve-outs for ordinary course trade payables and permitted encumbrances (as defined in the applicable agreements).

Under the agreements, amounts due will be paid from the cash flows generated by the assets securing the Series 2015-2 Notes or the assets securing the nonrecourse loan that secures the Secured Tower Revenue Securities, Series 2013-2A (the “Series 2013-2A Securities”), Secured Tower Revenue Securities, Series 2018-1, Subclass A (the “Series 2018-1A Securities”), and the Secured Tower Revenue Securities, Series 2018-1, Subclass R (the “Series 2018-1R Securities” and, together with the Series 2018-1A Securities, the “2018 Securities”) issued in the Trust Securitizations (the “Loan”), as applicable, which must be deposited into certain reserve accounts, and thereafter distributed, solely pursuant to the terms of the applicable agreement. On a monthly basis, after payment of all required amounts under the applicable agreement, subject to the conditions described in the table below, the excess cash flows generated from the operation of such assets are released to GTP Acquisition Partners or the AMT Asset Subs, as applicable, which can then be distributed to, and used by, us. As of September 30, 2022, $96.5 million held in such reserve accounts was classified as restricted cash.

Certain information with respect to the 2015 Securitization and the Trust Securitizations is set forth below. The debt service coverage ratio (“DSCR”) is generally calculated as the ratio of the net cash flow (as defined in the applicable agreement) to the amount of interest, servicing fees and trustee fees required to be paid over the succeeding 12 months on the principal amount of the Series 2015-2 Notes or the Loan, as applicable, that will be outstanding on the payment date following such date of determination.

	Issuer or Borrower	Notes/Securities Issued	Conditions Limiting Distributions of Excess Cash		Excess Cash Distributed During the Nine Months Ended September 30, 2022	DSCR as of September 30, 2022	Capacity for Decrease in Net Cash Flow Before Triggering Cash Trap DSCR (1)	Capacity for Decrease in Net Cash Flow Before Triggering Minimum DSCR (1)
			Cash Trap DSCR	Amortization Period
					(in millions)		(in millions)	(in millions)
2015 Securitization	GTP Acquisition Partners	American Tower Secured Revenue Notes, Series 2015-2	1.30x, Tested Quarterly (2)	(3)(4)	$294.9	16.33x	$276.6	$279.4
Trust Securitizations	AMT Asset Subs	Secured Tower Revenue Securities, Series 2013-2A, Secured Tower Revenue Securities, Series 2018-1, Subclass A and Secured Tower Revenue Securities, Series 2018-1, Subclass R	1.30x, Tested Quarterly (2)	(3)(5)	$461.9	10.28x	$536.4	$545.4

_____________

(1)Based on the net cash flow of the applicable issuer or borrower as of September 30, 2022 and the expenses payable over the next 12 months on the Series 2015-2 Notes or the Loan, as applicable.

(2)Once triggered, a Cash Trap DSCR condition continues to exist until the DSCR exceeds the Cash Trap DSCR for two consecutive calendar quarters. During a Cash Trap DSCR condition, all cash flow in excess of amounts required to make debt service payments, fund required reserves, pay management fees and budgeted operating expenses and make other payments required under the applicable transaction documents,

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referred to as excess cash flow, will be deposited into a reserve account (the “Cash Trap Reserve Account”) instead of being released to the applicable issuer or borrower. 

(3)An amortization period commences if the DSCR is equal to or below 1.15x (the “Minimum DSCR”) at the end of any calendar quarter and continues to exist until the DSCR exceeds the Minimum DSCR for two consecutive calendar quarters.

(4)No amortization period is triggered if the outstanding principal amount of a series has not been repaid in full on the applicable anticipated repayment date. However, in such event, additional interest will accrue on the unpaid principal balance of the applicable series, and such series will begin to amortize on a monthly basis from excess cash flow.

(5)An amortization period exists if the outstanding principal amount has not been paid in full on the applicable anticipated repayment date and continues to exist until such principal has been repaid in full.

A failure to meet the noted DSCR tests could prevent GTP Acquisition Partners or the AMT Asset Subs from distributing excess cash flow to us, which could affect our ability to fund our capital expenditures, including tower construction and acquisitions, and to meet REIT distribution requirements. During an “amortization period,” all excess cash flow and any amounts then in the applicable Cash Trap Reserve Account would be applied to pay the principal of the Series 2015-2 Notes or the Loan, as applicable, on each monthly payment date, and so would not be available for distribution to us. Further, additional interest will begin to accrue with respect to the Series 2015-2 Notes or subclass of the Loan from and after the anticipated repayment date at a per annum rate determined in accordance with the applicable agreement. With respect to the Series 2015-2 Notes, upon the occurrence of, and during, an event of default, the applicable trustee may, in its discretion or at the direction of holders of more than 50% of the aggregate outstanding principal of the Series 2015-2 Notes, declare the Series 2015-2 Notes immediately due and payable, in which case any excess cash flow would need to be used to pay holders of such notes. Furthermore, if GTP Acquisition Partners or the AMT Asset Subs were to default on the Series 2015-2 Notes or the Loan, the applicable trustee may seek to foreclose upon or otherwise convert the ownership of all or any portion of the 3,528 communications sites that secure the Series 2015-2 Notes or the 5,102 broadcast and wireless communications towers and related assets that secure the Loan, respectively, in which case we could lose such sites and the revenue associated with those assets.

As discussed above, we use our available liquidity and seek new sources of liquidity to fund capital expenditures, future growth and expansion initiatives, satisfy our distribution requirements and repay or repurchase our debt. If we determine that it is desirable or necessary to raise additional capital, we may be unable to do so, or such additional financing may be prohibitively expensive or restricted by the terms of our outstanding indebtedness. Additionally, as further discussed under the caption “Risk Factors” in Item 1A of the 2021 Form 10-K, extreme market volatility and disruption caused by the COVID-19 pandemic may impact our ability to raise additional capital through debt financing activities or our ability to repay or refinance maturing liabilities, or impact the terms of any new obligations. If we are unable to raise capital when our needs arise, we may not be able to fund capital expenditures, future growth and expansion initiatives, satisfy our REIT distribution requirements and debt service obligations, or refinance our existing indebtedness.

In addition, our liquidity depends on our ability to generate cash flow from operating activities. As set forth under the caption “Risk Factors” in Item 1A of the 2021 Form 10-K, we derive a substantial portion of our revenues from a small number of customers and, consequently, a failure by a significant customer to perform its contractual obligations to us could adversely affect our cash flow and liquidity.

For more information regarding the terms of our outstanding indebtedness, please see note 8 to our consolidated financial statements included in the 2021 Form 10-K.

Critical Accounting Policies and Estimates

Management’s discussion and analysis of financial condition and results of operations are based upon our consolidated and condensed consolidated financial statements, which have been prepared in accordance with GAAP. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, as well as related disclosures of contingent assets and liabilities. We evaluate our policies and estimates on an ongoing basis, including those related to impairment of long-lived assets, asset retirement obligations, revenue recognition, rent expense, income taxes and accounting for business combinations and acquisitions of assets, as further discussed in the 2021 Form 10-K. Management bases its estimates on historical experience and various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying amounts of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

We have reviewed our policies and estimates to determine our critical accounting policies for the nine months ended September 30, 2022. We have made no material changes to the critical accounting policies described in the 2021 Form 10-K.

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In October 2019, the Supreme Court of India issued a ruling regarding the definition of AGR and associated fees and charges, which was reaffirmed in March 2020, and again in July 2021 with respect to the total charges, that may have a material financial impact on certain of our customers and could affect their ability to perform their obligations under agreements with us. In September 2020, the Supreme Court of India defined the expected timeline of ten years for payments owed under the ruling. In September 2021, the government of India approved a relief package that, among other things, included (i) a four-year moratorium on the payment of AGR fees owed and (ii) a change in the definition of AGR on a prospective basis. During the three months ended September 30, 2022, our largest customer in India, VIL, indicated that it would make a partial payment of its contractual amounts owed to us under tenant leases for the remainder of 2022, including amounts owed for the three months ended September 30, 2022. For the three months ended September 30, 2022, the shortfall in payments totaled approximately $48 million. We have deferred recognition of revenue on the shortfall amount until payment is received. Recognition of revenue on any future shortfalls in payment of contractual amounts will be similarly deferred. Based on indications from VIL, we expect to defer recognition of a similar amount for the three months ended December 31, 2022, pending resolution. VIL has communicated its intent to fulfill the full amount of its contractual obligations commencing January 1, 2023, although no assurance can be given that this will occur.

We will continue to monitor the status of these developments, as it is possible that the estimated future cash flows may differ from current estimates and changes in estimated cash flows from customers in India could have an impact on previously recorded tangible and intangible assets, including amounts originally recorded as tenant-related intangibles.

The carrying value of tenant-related intangibles in India was $0.8 billion as of September 30, 2022, which represents 6% of our consolidated balance of $13.3 billion. Additionally, a significant reduction in customer related cash flows in India could also impact our tower portfolio and network location intangibles. The carrying values of our tower portfolio and network location intangibles in India were $0.9 billion and $0.3 billion, respectively, as of September 30, 2022, which represent 11% and 9% of our consolidated balances of $8.5 billion and $3.6 billion, respectively. The carrying value of goodwill in India was $0.9 billion as of September 30, 2022, which represents 7% of our consolidated balance of $12.7 billion.

During the nine months ended September 30, 2022, no potential goodwill impairment was identified as the fair value of each of our reporting units was in excess of its carrying amount.

Accounting Standards Update

For a discussion of recent accounting standards updates, see note 1 to our consolidated and condensed consolidated financial statements included in this Quarterly Report.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Interest Rate Risk

As of September 30, 2022, we have three interest rate swap agreements related to a portion of our 3.000% senior unsecured notes due 2023 (the “3.000% Notes”). These swaps have been designated as fair value hedges, have an aggregate notional amount of $500.0 million and an interest rate of one-month LIBOR plus applicable spreads and expire in June 2023.

Changes in interest rates can cause interest charges to fluctuate on our variable rate debt. Variable rate debt as of September 30, 2022 consisted of $4.4 billion under the 2021 Multicurrency Credit Facility, $705.0 million under the 2021 Credit Facility, $1.0 billion under the 2021 Term Loan, $808.7 million under the 2021 EUR Three Year Delayed Draw Term Loan, $1.5 billion under the 2021 USD Two Year Delayed Draw Term Loan and $500.0 million under the interest rate swap agreements related to the 3.000% Notes. A 10% increase in current interest rates would result in an additional $22.7 million of interest expense for the nine months ended September 30, 2022.

Foreign Currency Risk

We are exposed to market risk from changes in foreign currency exchange rates primarily in connection with our foreign subsidiaries and joint ventures internationally. Any transaction denominated in a currency other than the U.S. Dollar is reported in U.S. Dollars at the applicable exchange rate. All assets and liabilities are translated into U.S. Dollars at exchange rates in effect at the end of the applicable fiscal reporting period and all revenues and expenses are translated at average rates for the period. The cumulative translation effect is included in equity as a component of Accumulated other comprehensive loss. We may enter into additional foreign currency financial instruments in anticipation of future transactions to minimize the impact of foreign currency exchange rate fluctuations. For the nine months ended September 30, 2022, 44% of our revenues and 48% of our total operating expenses were denominated in foreign currencies.

As of September 30, 2022, we have incurred intercompany debt that is not considered to be permanently reinvested and similar unaffiliated balances that were denominated in a currency other than the functional currency of the subsidiary in which it is recorded. As this debt had not been designated as being a long-term investment in nature, any changes in the foreign currency exchange rates will result in unrealized gains or losses, which will be included in our determination of net income. An adverse change of 10% in the underlying exchange rates of our unsettled intercompany debt and similar unaffiliated balances would result in $36.9 million of unrealized losses that would be included in Other expense in our consolidated statements of operations for the nine months ended September 30, 2022. As of September 30, 2022, we have 7.3 billion EUR (approximately $7.1 billion) denominated debt outstanding. An adverse change of 10% in the underlying exchange rates of our outstanding EUR debt would result in $0.8 billion of foreign currency losses that would be included in Other expense in our consolidated statements of operations for the nine months ended September 30, 2022.

ITEM 4. CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

We have established disclosure controls and procedures designed to ensure that material information relating to us, including our consolidated subsidiaries, is made known to the officers who certify our financial reports and to other members of senior management and the Board of Directors.

Our management, with the participation of our principal executive officer and principal financial officer, evaluated the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), as of the end of the period covered by this Quarterly Report. Based on this evaluation, our principal executive officer and principal financial officer concluded that these disclosure controls and procedures were effective as of September 30, 2022 and designed to ensure that the information required to be disclosed in our reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the requisite time periods specified in the applicable rules and forms, and that it is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.

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Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) during the fiscal quarter ended September 30, 2022 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. As permitted by the rules and regulations of the Securities and Exchange Commission, we excluded from our assessment the internal control over financial reporting at Telxius and CoreSite, which were acquired in 2021, for the year ended December 31, 2021. We consider Telxius and CoreSite to be material to our results of operations, financial position and cash flows, and we are in the process of integrating the internal control procedures of Telxius and CoreSite into our internal control structure.

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PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

We periodically become involved in various claims and lawsuits that are incidental to our business. In the opinion of management, after consultation with counsel, there are no matters currently pending that would, in the event of an adverse outcome, have a material impact on our consolidated financial position, results of operations or liquidity.

ITEM 1A. RISK FACTORS

We have updated the risk factor regarding our customers. Other than as set forth below, there were no material changes to the risk factors disclosed in Item 1A of the 2021 Form 10-K.

A substantial portion of our revenue is derived from a small number of customers, and we are sensitive to adverse changes in the creditworthiness and financial strength of our customers.

A substantial portion of our total operating revenues is derived from a small number of customers. If any of these customers are unwilling or unable to perform their obligations under their agreements with us, our revenues, results of operations, financial condition and liquidity could be materially and adversely affected.

One or more of our customers, or their parent companies, may experience financial difficulties, file for bankruptcy or reduce or terminate operations as a result of a prolonged economic downturn, economic difficulties (including those from the imposition of taxes, fees, regulations or judicial interpretations of regulations, and any associated penalties or interest, which may be substantial) or otherwise. The ongoing COVID-19 pandemic could materially and adversely affect our customers through disruptions of, among other things, their ability to procure their equipment through their supply chains and their ability to maintain liquidity and deploy network capital, with potential decreases in consumer spending contributing to liquidity risks. Such financial difficulties could result in uncollectible accounts receivable and an impairment of our deferred rent asset, tower asset, network location intangible asset, tenant-related intangible asset or goodwill. The loss of significant customers, or the loss of all or a portion of our anticipated lease revenues from certain customers, could have a material adverse effect on our business, results of operations or financial condition.

Our largest customer in India is VIL, which represented approximately 2% and 3% of our total revenue for the three and nine months ended September 30, 2022, respectively. During the three months ended September 30, 2022, VIL indicated that it would make a partial payment of its contractual amounts owed to us under tenant leases for the remainder of 2022, including amounts owed for the three months ended September 30, 2022. For the three months ended September 30, 2022, the shortfall in payments totaled approximately $48 million. We have deferred recognition of revenue on the shortfall amount until payment is received. Recognition of revenue on any future shortfalls in payment of contractual amounts will be similarly deferred. Based on indications from VIL, we expect to defer recognition of a similar amount for the three months ended December 31, 2022, pending resolution. VIL has communicated its intent to fulfill the full amount of its contractual obligations commencing January 1, 2023, although no assurance can be given that this will occur.

On October 21, 2022, ATC TIPL and VIL notified the stock exchange of India that both parties have board approvals in relation to an issuance of convertible debentures pursuant to which, in exchange for VIL’s payment of certain amounts towards accounts receivables, ATC TIPL shall pay equivalent amounts towards subscription to convertible debentures issued by VIL. The convertible debentures are to be repaid by VIL with interest and ATC TIPL has the option to convert the debentures into equity of VIL. The issuance of the debentures is subject to certain conditions precedent, which may not be met. VIL may not be able to meet its operating obligations, including making payments to us in the future, which could have a material adverse effect on our business and results of operations.

Due to the long-term nature of our customer leases, we depend on the continued financial strength of our customers. Many communications service providers operate with substantial levels of debt. In our international operations, many of our customers are subsidiaries of global telecommunications companies. These subsidiaries may not have the explicit or implied financial support of their parent entities.

In addition, many of our customers and potential customers rely on capital raising activities to fund their operations and capital expenditures, which may be more difficult or expensive in the event of downturns in the economy or disruptions in the financial and credit markets, such as the current environment driven by the significant disruptions caused by factors such as the COVID-19 pandemic, inflation, rising interest rates and supply chain disruptions. If our customers or

61

potential customers are unable to raise adequate capital to fund their business plans or face capital constraints, they may reduce their spending, file for bankruptcy or reduce or terminate operations, which could materially and adversely affect demand for our communications infrastructure and our services business.

In the ordinary course of our business, we do occasionally experience disputes with our customers, generally regarding the interpretation of terms in our leases. Historically, we have resolved these disputes in a manner that did not have a material adverse effect on us or our relationships with our customers. However, it is possible that such disputes could lead to a termination of our leases with those customers, a material adverse modification of the terms of those leases or a deterioration in our relationships with those customers that leads to a failure to obtain new business from them, any of which could have a material adverse effect on our business, results of operations or financial condition. If we are forced to resolve any of these disputes through litigation, our relationship with the applicable customer could be terminated or damaged, which could lead to decreased revenue or increased costs, resulting in a corresponding adverse effect on our business, results of operations or financial condition.

62

ITEM 6. EXHIBITS

		Incorporated By Reference
Exhibit No.	Description of Document	Form	File No.	Date of Filing	Exhibit No.
3.1	Restated Certificate of Incorporation of the Company as filed with the Secretary of State of the State of Delaware, effective as of December 31, 2011	8-K	001-14195	January 3, 2012	3.1
3.2	Certificate of Merger, effective as of December 31, 2011	8-K	001-14195	January 3, 2012	3.2
3.3	Amended and Restated By-Laws of the Company, effective as of February 12, 2016	8-K	001-14195	February 16, 2016	3.1
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002	Filed herewith as Exhibit 31.1	—	—	—
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002	Filed herewith as Exhibit 31.2	—	—	—
32	Certifications filed pursuant to 18. U.S.C. Section 1350	Filed herewith as Exhibit 32	—	—	—
101.SCH	Inline XBRL Taxonomy Extension Schema Document		—	—	—
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF	Inline XBRL Taxonomy Extension Definition	Filed herewith as Exhibit 101
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)	—	—	—	—

63

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	AMERICAN TOWER CORPORATION
Date: October 27, 2022	By:	/S/   RODNEY M. SMITH
		Rodney M. Smith Executive Vice President, Chief Financial Officer and Treasurer (Duly Authorized Officer and Principal Financial Officer)

64

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

I, Thomas A. Bartlett, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of American Tower Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: October 27, 2022	By:	/S/    THOMAS A. BARTLETT
		Thomas A. Bartlett
		President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Rodney M. Smith, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of American Tower Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: October 27, 2022	By:	/S/    RODNEY M.SMITH
		Rodney M. Smith
		Executive Vice President, Chief Financial Officer and Treasurer

EX-32

Exhibit 32

CERTIFICATIONS PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with this Quarterly Report on Form 10-Q of American Tower Corporation (the “Company”) for the nine months ended September 30, 2022, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned officers of the Company hereby certifies, pursuant to 18 U.S.C. Section 1350, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: October 27, 2022	By:	/S/   THOMAS A. BARTLETT
		Thomas A. Bartlett
		President and Chief Executive Officer
Date: October 27, 2022	By:	/S/    RODNEY M. SMITH
		Rodney M. Smith
		Executive Vice President, Chief Financial Officer and Treasurer

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Cover Page - shares	9 Months Ended
	Sep. 30, 2022	Oct. 20, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 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		465,605,603
Entity Central Index Key	0001053507
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
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

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
CURRENT ASSETS:
Cash and cash equivalents	$ 2,121.8	$ 1,949.9
Restricted cash	127.8	393.4
Accounts receivable, net	722.4	728.9
Prepaid and other current assets	787.0	657.2
Total current assets	3,759.0	3,729.4
PROPERTY AND EQUIPMENT, net	19,402.6	19,784.0
GOODWILL	12,686.2	13,350.1
OTHER INTANGIBLE ASSETS, net	18,320.3	20,727.2
DEFERRED TAX ASSET	116.4	131.6
DEFERRED RENT ASSET	2,878.0	2,539.6
RIGHT-OF-USE ASSET	8,857.5	9,225.1
NOTES RECEIVABLE AND OTHER NON-CURRENT ASSETS	492.8	400.9
TOTAL	66,512.8	69,887.9
CURRENT LIABILITIES:
Accounts payable	212.0	272.4
Accrued expenses	1,202.7	1,412.8
Distributions payable	697.1	642.1
Accrued interest	199.5	254.7
Current portion of operating lease liability	766.3	712.6
Current portion of long-term obligations	3,015.2	4,568.7
Unearned revenue	529.8	1,204.0
Total current liabilities	6,622.6	9,067.3
LONG-TERM OBLIGATIONS	35,313.9	38,685.5
OPERATING LEASE LIABILITY	7,566.4	8,041.8
ASSET RETIREMENT OBLIGATIONS	2,010.2	2,003.0
DEFERRED TAX LIABILITY	1,496.8	1,830.9
OTHER NON-CURRENT LIABILITIES	1,184.3	1,189.8
Total liabilities	54,194.2	60,818.3
COMMITMENTS AND CONTINGENCIES
EQUITY (shares in thousands):
Common stock: $.01 par value; 1,000,000 shares authorized; 476,517 and 466,687 shares issued; and 465,602 and 455,772 shares outstanding, respectively	4.8	4.7
Additional paid-in capital	14,646.9	12,240.2
Distributions in excess of earnings	(689.3)	(1,142.4)
Accumulated other comprehensive loss	(6,398.2)	(4,738.9)
Treasury stock (10,915 shares at cost)	(1,282.4)	(1,282.4)
Total American Tower Corporation equity	6,281.8	5,081.2
Noncontrolling interests	6,036.8	3,988.4
Total equity	12,318.6	9,069.6
TOTAL	$ 66,512.8	$ 69,887.9

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares shares in Thousands	Sep. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000	1,000,000
Common stock, shares issued (in shares)	476,517	466,687
Common stock, shares outstanding (in shares)	465,602	455,772
Treasury stock, shares (in shares)	10,915	10,915

XML

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
REVENUES:
Total operating revenues	$ 2,671.5	$ 2,454.3	$ 8,006.1	$ 6,911.7
Costs of operations (exclusive of items shown separately below):
Property	808.8	693.4	2,374.3	1,880.0
Depreciation, amortization and accretion	898.1	611.4	2,540.4	1,688.7
Selling, general, administrative and development expense	231.2	205.9	748.0	595.7
Other operating expenses	52.8	85.2	98.6	175.4
Total operating expenses	2,018.6	1,626.8	5,845.8	4,406.3
OPERATING INCOME	652.9	827.5	2,160.3	2,505.4
OTHER INCOME (EXPENSE):
Interest income	18.8	9.4	43.0	28.4
Interest expense	(294.0)	(226.1)	(833.0)	(646.8)
Loss on retirement of long-term obligations	(0.4)	0.0	(0.4)	(25.7)
Other income (including foreign currency gains of $474.5, $180.5, $1,111.3 and $422.1, respectively)	478.5	166.8	1,109.4	439.6
Total other income (expense)	202.9	(49.9)	319.0	(204.5)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	855.8	777.6	2,479.3	2,300.9
Income tax provision	(36.1)	(51.4)	(66.0)	(174.5)
NET INCOME	819.7	726.2	2,413.3	2,126.4
Net loss (income) attributable to noncontrolling interests	20.0	(3.2)	36.3	(12.1)
NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS	$ 839.7	$ 723.0	$ 2,449.6	$ 2,114.3
NET INCOME PER COMMON SHARE AMOUNTS:
Basic net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 1.80	$ 1.59	$ 5.32	$ 4.70
Diluted net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 1.80	$ 1.58	$ 5.31	$ 4.68
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING (in thousands):
BASIC (in shares)	465,594	455,224	460,141	450,148
DILUTED (in shares)	466,801	456,977	461,360	451,981
Property
REVENUES:
Total operating revenues	$ 2,609.9	$ 2,368.9	$ 7,825.2	$ 6,731.6
Services
REVENUES:
Total operating revenues	61.6	85.4	180.9	180.1
Costs of operations (exclusive of items shown separately below):
Services	$ 27.7	$ 30.9	$ 84.5	$ 66.5

XML

CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Foreign currency (losses) gains	$ 474.5	$ 180.5	$ 1,111.3	$ 422.1

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 819.7	$ 726.2	$ 2,413.3	$ 2,126.4
Other comprehensive income (loss):
Changes in fair value of cash flow hedges, each net of tax expense of $0	0.0	0.0	0.0	(0.0)
Reclassification of unrealized losses on cash flow hedges to net income, each net of tax expense of $0	0.0	0.0	0.0	0.1
Foreign currency translation adjustments, net of tax (benefit) expense of $(0.8), $0.0, $(1.0) and $(0.0), respectively.	(1,075.9)	(622.0)	(2,117.9)	(826.9)
Other comprehensive (loss) income	(1,075.9)	(622.0)	(2,117.9)	(826.8)
Comprehensive (loss) income	(256.2)	104.2	295.4	1,299.6
Comprehensive loss (income) attributable to noncontrolling interests	225.9	89.7	494.9	94.6
Allocation of accumulated other comprehensive income resulting from purchases of noncontrolling interest and redeemable noncontrolling interests	0.0	0.0	0.0	47.5
Comprehensive (loss) income attributable to American Tower Corporation stockholders	$ (30.3)	$ 193.9	$ 790.3	$ 1,441.7

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Changes in fair value of cash flow hedges, tax	$ 0.0	$ 0.0	$ 0.0	$ 0.0
Reclassification of unrealized gains on cash flow hedges to net income, tax	0.0	0.0	0.0	0.0
Foreign currency translation adjustments, tax expense (benefit)	$ (0.8)	$ 0.0	$ (1.0)	$ (0.0)

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 2,413.3	$ 2,126.4
Adjustments to reconcile net income to cash provided by operating activities
Depreciation, amortization and accretion	2,540.4	1,688.7
Stock-based compensation expense	138.1	98.0
Loss on early retirement of long-term obligations	0.4	25.7
Other non-cash items reflected in statements of operations	(1,112.2)	(340.8)
Increase in net deferred rent balances	(350.4)	(324.3)
Right-of-use asset and Operating lease liability, net	0.6	13.9
Changes in unearned revenue	(710.9)	995.1
Increase in assets	(309.3)	(201.6)
(Decrease) increase in liabilities	(98.8)	59.9
Cash provided by operating activities	2,511.2	4,141.0
CASH FLOWS FROM INVESTING ACTIVITIES
Payments for purchase of property and equipment and construction activities	(1,215.4)	(916.7)
Payments for acquisitions, net of cash acquired	(359.1)	(9,595.3)
Proceeds from sale of short-term investments and other non-current assets	16.0	13.8
Payment for investments in equity securities	0.0	(25.0)
Deposits and other	52.3	(1.3)
Cash used for investing activities	(1,506.2)	(10,524.5)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from short-term borrowings, net	13.5	0.0
Borrowings under credit facilities	3,500.0	7,666.9
Proceeds from issuance of senior notes, net	1,293.6	5,609.4
Proceeds from term loans	0.0	2,347.0
Repayments of notes payable, credit facilities, senior notes, secured debt, term loans and finance leases	(8,595.7)	(10,752.8)
Distributions to noncontrolling interest holders	(3.2)	(223.1)
Contributions from noncontrolling interest holders	2,548.5	3,078.2
Proceeds from stock options and employee stock purchase plan	21.0	60.4
Distributions paid on common stock	(1,945.9)	(1,674.4)
Proceeds from the issuance of common stock, net	2,291.7	2,361.8
Payment for early retirement of long-term obligations	0.0	(61.9)
Deferred financing costs and other financing activities	(84.0)	(126.2)
Purchase of redeemable noncontrolling interest	0.0	(2.5)
Cash (used for) provided by financing activities	(960.5)	8,282.8
Net effect of changes in foreign currency exchange rates on cash and cash equivalents, and restricted cash	(138.2)	(61.4)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH	(93.7)	1,837.9
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	2,249.6	3,699.3
CASH PAID FOR INCOME TAXES (NET OF REFUNDS OF $7.1 AND $35.2, RESPECTIVELY)	244.5	121.1
CASH PAID FOR INTEREST	852.5	576.9
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Purchases of property and equipment under finance leases and perpetual easements	19.4	42.2
Decrease in accounts payable and accrued expenses for purchases of property and equipment and construction activities	(26.5)	(0.4)
Settlement of third-party debt	$ 0.0	$ (9.0)

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Statement of Cash Flows [Abstract]
Income tax refunds	$ 7.1	$ 35.2

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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, treasury stock (shares) at Dec. 31, 2020			(10,915)
Balance at beginning of period at Dec. 31, 2020	$ 4,568.4	$ 4.6	$ (1,282.4)	$ 10,473.7	$ (3,759.4)	$ (1,343.0)	$ 474.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity (shares)		1,115
Stock-based compensation related activity	99.9	$ 0.0		99.9
Issuance of common stock-stock purchase plan (in shares)		38
Issuance of common stock-stock purchase plan	7.7	$ 0.0		7.7
Issuance of common stock (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)				(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	(823.5)				(720.2)		(103.3)
Adjustment to noncontrolling interest	0.0			(648.4)	47.4		601.0
Contributions from noncontrolling interest holders	3,078.2						3,078.2
Distributions to noncontrolling interest holders	(215.3)			(214.9)			(0.4)
Redemption of noncontrolling interest (shares)		26
Redemption of noncontrolling interest	0.0	$ 0.0		1.7			(1.7)
Purchase of redeemable noncontrolling interest	0.0			(0.1)	0.1
Purchase of noncontrolling interest	10.2						10.2
Common stock distributions declared	(1,731.7)					(1,731.7)
Net income (loss)	2,121.2					2,114.3	6.9
Balance at end of period, common stock (shares) at Sep. 30, 2021		466,324
Balance at end of period, treasury stock (shares) at Sep. 30, 2021			(10,915)
Balance at end of period at Sep. 30, 2021	9,477.0	$ 4.7	$ (1,282.4)	12,081.3	(4,432.0)	(960.4)	4,065.8
Balance at beginning of period, common stock (shares) at Jun. 30, 2021		465,946
Balance at beginning of period, treasury stock (shares) at Jun. 30, 2021			(10,915)
Balance at beginning of period at Jun. 30, 2021	6,823.4	$ 4.7	$ (1,282.4)	12,019.8	(3,902.9)	(1,085.0)	1,069.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity (shares)		378
Stock-based compensation related activity	61.5	$ 0.0		61.5
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	0.0
Foreign currency translation adjustment, net of tax	(622.3)				(529.1)		(93.2)
Contributions from noncontrolling interest holders							3,078.2
Distributions to noncontrolling interest holders	(0.1)						(0.1)
Purchase of redeemable noncontrolling interest	10.2						10.2
Common stock distributions declared	(598.4)					(598.4)
Net income (loss)	724.5					723.0	1.5
Balance at end of period, common stock (shares) at Sep. 30, 2021		466,324
Balance at end of period, treasury stock (shares) at Sep. 30, 2021			(10,915)
Balance at end of period at Sep. 30, 2021	$ 9,477.0	$ 4.7	$ (1,282.4)	12,081.3	(4,432.0)	(960.4)	4,065.8
Balance at beginning of period, common stock (shares) at Dec. 31, 2021	455,772	466,687
Balance at beginning of period, treasury stock (shares) at Dec. 31, 2021	(10,915)		(10,915)
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity (shares)		607
Stock-based compensation related activity	106.8	$ 0.0		106.8
Issuance of common stock-stock purchase plan (in shares)		38
Issuance of common stock-stock purchase plan	8.3	$ 0.0		8.3
Issuance of common stock (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	0.0
Reclassification of unrealized losses on cash flow hedges to net income, net of tax	0.0
Foreign currency translation adjustment, net of tax	(2,117.9)				(1,659.3)		(458.6)
Adjustment to noncontrolling interest							0.0
Contributions from noncontrolling interest holders	2,552.6						2,552.6
Distributions to noncontrolling interest holders	(9.3)						(9.3)
Redemption of noncontrolling interest							0.0
Common stock distributions declared	(1,996.5)					(1,996.5)
Net income (loss)	$ 2,413.3					2,449.6	(36.3)
Balance at end of period, common stock (shares) at Sep. 30, 2022	465,602	476,517
Balance at end of period, treasury stock (shares) at Sep. 30, 2022	(10,915)		(10,915)
Balance at end of period at Sep. 30, 2022	$ 12,318.6	$ 4.8	$ (1,282.4)	14,646.9	(6,398.2)	(689.3)	6,036.8
Balance at beginning of period, common stock (shares) at Jun. 30, 2022		476,500
Balance at beginning of period, treasury stock (shares) at Jun. 30, 2022			(10,915)
Balance at beginning 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity (shares)		17
Stock-based compensation related activity	40.1	$ 0.0		40.1
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	0.0
Foreign currency translation adjustment, net of tax	(1,075.9)				(870.0)		(205.9)
Contributions from noncontrolling interest holders	2,504.2						2,504.2
Distributions to noncontrolling interest holders	(9.0)						(9.0)
Common stock distributions declared	(686.7)					(686.7)
Net income (loss)	$ 819.7					839.7	(20.0)
Balance at end of period, common stock (shares) at Sep. 30, 2022	465,602	476,517
Balance at end of period, treasury stock (shares) at Sep. 30, 2022	(10,915)		(10,915)
Balance at end of period at Sep. 30, 2022	$ 12,318.6	$ 4.8	$ (1,282.4)	$ 14,646.9	$ (6,398.2)	$ (689.3)	$ 6,036.8

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

9 Months Ended

Sep. 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 nine months ended September 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 September 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), (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) and (iii) a common equity interest of approximately 77% in the Company’s U.S. data center business (Stonepeak (as defined and further discussed in note 11) holds approximately 23% of the outstanding common equity and 100% of the outstanding mandatorily convertible preferred equity). As of September 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 nine months ended September 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 nine months ended September 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:

	Nine Months Ended September 30,
	2022		2021
Cash and cash equivalents	$	2,121.8	$	3,277.2
Restricted cash	127.8		422.1
Total cash, cash equivalents and restricted cash	$	2,249.6	$	3,699.3

Restricted cash as of September 30, 2021 includes 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 the space in its data center facilities (the “lease component”) and from the reimbursement of costs incurred by the Company in operating the communications sites and data center facilities and supporting its

customers’ equipment as well as other services and contractual rights (the “non-lease component”). Most of the Company’s revenue is derived from leasing arrangements and is accounted for as lease revenue unless the timing and pattern of revenue recognition of the non-lease component differs from the lease component. If the timing and pattern of the non-lease component revenue recognition differs from that of the lease component, the Company separately determines the stand-alone selling prices and pattern of revenue recognition for each performance obligation. Revenue related to distributed antenna system (“DAS”) networks and fiber and other related assets results from agreements with customers that are generally not accounted for as leases.

Non-lease property revenue—Non-lease property revenue consists primarily of revenue generated from DAS networks, fiber and other property related revenue. DAS networks and fiber arrangements generally require that the Company provide the tenant the right to use available capacity on the applicable communications infrastructure. Performance obligations are satisfied over time for the duration of the arrangements. Non-lease property revenue also includes revenue generated from interconnection offerings in the Company’s data center facilities. Interconnection offerings are generally contracted on a month-to-month basis and are cancellable by the Company or the data center customer at any time. Performance obligations are satisfied over time for the duration of the arrangements. Other property related revenue streams, which include site inspections, are not material on either an individual or consolidated basis. There were no material changes in the receivables, contract assets and contract liabilities from contracts with customers for the three and nine months ended September 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 September 30, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers (1)		Total
Non-lease property revenue	$	74.3	$	4.1	$	6.5	$	8.3	$	39.0	$	26.8	$	159.0
Services revenue	61.6		—		—		—		—		—		61.6
Total non-lease revenue	$	135.9	$	4.1	$	6.5	$	8.3	$	39.0	$	26.8	$	220.6
Property lease revenue	1,184.9		245.1		296.9		175.7		381.4		166.9		2,450.9
Total revenue	$	1,320.8	$	249.2	$	303.4	$	184.0	$	420.4	$	193.7	$	2,671.5

Three Months Ended September 30, 2021	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers (1)		Total
Non-lease property revenue	$	73.2	$	2.6	$	6.3	$	2.1	$	35.1	$	—	$	119.3
Services revenue	85.4		—		—		—		—		—		85.4
Total non-lease revenue	$	158.6	$	2.6	$	6.3	$	2.1	$	35.1	$	—	$	204.7
Property lease revenue	1,155.3		310.9		251.1		173.7		355.9		2.7		2,249.6
Total revenue	$	1,313.9	$	313.5	$	257.4	$	175.8	$	391.0	$	2.7	$	2,454.3

Nine Months Ended September 30, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers (1)		Total
Non-lease property revenue	$	222.3	$	12.0	$	20.7	$	17.5	$	114.9	$	78.6	$	466.0
Services revenue	180.9		—		—		—		—		—		180.9
Total non-lease revenue	$	403.2	$	12.0	$	20.7	$	17.5	$	114.9	$	78.6	$	646.9
Property lease revenue	3,505.2		833.7		836.0		543.8		1,150.0		490.5		7,359.2
Total revenue	$	3,908.4	$	845.7	$	856.7	$	561.3	$	1,264.9	$	569.1	$	8,006.1

Nine Months Ended September 30, 2021	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers (1)		Total
Non-lease property revenue	$	214.9	$	6.8	$	17.5	$	6.0	$	100.9	$	—	$	346.1
Services revenue	180.1		—		—		—		—		—		180.1
Total non-lease revenue	$	395.0	$	6.8	$	17.5	$	6.0	$	100.9	$	—	$	526.2
Property lease revenue	3,473.3		886.3		723.6		302.2		992.4		7.7		6,385.5
Total revenue	$	3,868.3	$	893.1	$	741.1	$	308.2	$	1,093.3	$	7.7	$	6,911.7

_______________

(1)Data Centers consists of the Company’s data center facilities located in the United States. For the three and nine months ended September 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 September 30, 2022 and 2021 includes straight-line revenue of $127.7 million and $99.6 million, respectively. Property revenue for the nine months ended September 30, 2022 and 2021 includes straight-line revenue of $350.4 million and $324.3 million, respectively.

The Company actively monitors the creditworthiness of its customers. In recognizing customer revenue, the Company assesses the collectibility of both the amounts billed and the portion recognized in advance of billing on a straight-line basis. This assessment takes customer credit risk and business and industry conditions into consideration to ultimately determine the collectibility of the amounts billed. To the extent the amounts, based on management’s estimates, may not be collectible, revenue recognition is deferred until such point as collectibility is determined to be reasonably assured. During the three months ended September 30, 2022, the Company deferred recognition of revenue of approximately $48 million related to a customer in India.

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 September 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.

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PREPAID AND OTHER CURRENT ASSETS

9 Months Ended

Sep. 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
	September 30, 2022		December 31, 2021
Prepaid assets	$	129.4	$	94.5
Prepaid income tax	157.5		128.6
Unbilled receivables	304.4		269.6
Value added tax and other consumption tax receivables	92.2		83.9
Other miscellaneous current assets	103.5		80.6
Prepaid and other current assets	$	787.0	$	657.2

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LEASES

9 Months Ended

Sep. 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 nine months ended September 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 September 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 September 30, 2022 were as follows:

Fiscal Year	Amount (1)
Remainder of 2022	$	1,675.7
2023	7,397.6
2024	7,121.1
2025	6,715.1
2026	6,284.5
Thereafter	33,155.8
Total	$	62,349.8

_______________

(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 nine months ended September 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 September 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 nine months ended September 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 nine months ended September 30, 2022.

Information about other lease-related balances is as follows:

	As of
	September 30, 2022		December 31, 2021
Operating leases:
Right-of-use asset	$	8,857.5	$	9,225.1
Current portion of lease liability	$	766.3	$	712.6
Lease liability	7,566.4		8,041.8
Total operating lease liability	$	8,332.7	$	8,754.4

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

	As of
	September 30, 2022		December 31, 2021
Operating leases:
Weighted-average remaining lease term (years)	12.3		13.0
Weighted-average incremental borrowing rate	5.2	%	5.1	%

The following table sets forth the components of lease cost:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Operating lease cost	$	309.1	$	295.6	$	919.8	$	815.3
Variable lease costs not included in lease liability (1)	92.3		94.3		290.0		248.7

______________

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

Supplemental cash flow information is as follows:

	Nine Months Ended September 30,
	2022		2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(916.0)	$	(798.2)
Non-cash items:
New operating leases (1)	$	289.9	$	1,607.2
Operating lease modifications and reassessments	$	114.2	$	165.3

_______________

(1)Amount includes new operating leases and leases acquired in connection with acquisitions. For the nine months ended September 30, 2021, includes $1.4 billion related to the Telxius Acquisition (as defined in note 14).

As of September 30, 2022, the Company does not have material operating or financing leases that have not yet commenced.

Maturities of operating lease liabilities as of September 30, 2022 were as follows:

Fiscal Year	Operating Lease (1)
Remainder of 2022	$	288.8
2023	1,085.7
2024	1,031.2
2025	971.3
2026	914.8
Thereafter	6,980.9
Total lease payments	11,272.7
Less amounts representing interest	(2,940.0)
Total lease liability	8,332.7
Less current portion of lease liability	766.3
Non-current lease liability	$	7,566.4

_______________

(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 nine months ended September 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 September 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 September 30, 2022 were as follows:

Fiscal Year	Amount (1)
Remainder of 2022	$	1,675.7
2023	7,397.6
2024	7,121.1
2025	6,715.1
2026	6,284.5
Thereafter	33,155.8
Total	$	62,349.8

_______________

(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 nine months ended September 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 September 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 nine months ended September 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 nine months ended September 30, 2022.

Information about other lease-related balances is as follows:

	As of
	September 30, 2022		December 31, 2021
Operating leases:
Right-of-use asset	$	8,857.5	$	9,225.1
Current portion of lease liability	$	766.3	$	712.6
Lease liability	7,566.4		8,041.8
Total operating lease liability	$	8,332.7	$	8,754.4

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

	As of
	September 30, 2022		December 31, 2021
Operating leases:
Weighted-average remaining lease term (years)	12.3		13.0
Weighted-average incremental borrowing rate	5.2	%	5.1	%

The following table sets forth the components of lease cost:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Operating lease cost	$	309.1	$	295.6	$	919.8	$	815.3
Variable lease costs not included in lease liability (1)	92.3		94.3		290.0		248.7

______________

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

Supplemental cash flow information is as follows:

	Nine Months Ended September 30,
	2022		2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(916.0)	$	(798.2)
Non-cash items:
New operating leases (1)	$	289.9	$	1,607.2
Operating lease modifications and reassessments	$	114.2	$	165.3

_______________

(1)Amount includes new operating leases and leases acquired in connection with acquisitions. For the nine months ended September 30, 2021, includes $1.4 billion related to the Telxius Acquisition (as defined in note 14).

As of September 30, 2022, the Company does not have material operating or financing leases that have not yet commenced.

Maturities of operating lease liabilities as of September 30, 2022 were as follows:

Fiscal Year	Operating Lease (1)
Remainder of 2022	$	288.8
2023	1,085.7
2024	1,031.2
2025	971.3
2026	914.8
Thereafter	6,980.9
Total lease payments	11,272.7
Less amounts representing interest	(2,940.0)
Total lease liability	8,332.7
Less current portion of lease liability	766.3
Non-current lease liability	$	7,566.4

_______________

(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 nine months ended September 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 September 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 September 30, 2022 were as follows:

Fiscal Year	Amount (1)
Remainder of 2022	$	1,675.7
2023	7,397.6
2024	7,121.1
2025	6,715.1
2026	6,284.5
Thereafter	33,155.8
Total	$	62,349.8

_______________

(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 nine months ended September 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 September 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 nine months ended September 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 nine months ended September 30, 2022.

Information about other lease-related balances is as follows:

	As of
	September 30, 2022		December 31, 2021
Operating leases:
Right-of-use asset	$	8,857.5	$	9,225.1
Current portion of lease liability	$	766.3	$	712.6
Lease liability	7,566.4		8,041.8
Total operating lease liability	$	8,332.7	$	8,754.4

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

	As of
	September 30, 2022		December 31, 2021
Operating leases:
Weighted-average remaining lease term (years)	12.3		13.0
Weighted-average incremental borrowing rate	5.2	%	5.1	%

The following table sets forth the components of lease cost:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Operating lease cost	$	309.1	$	295.6	$	919.8	$	815.3
Variable lease costs not included in lease liability (1)	92.3		94.3		290.0		248.7

______________

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

Supplemental cash flow information is as follows:

	Nine Months Ended September 30,
	2022		2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(916.0)	$	(798.2)
Non-cash items:
New operating leases (1)	$	289.9	$	1,607.2
Operating lease modifications and reassessments	$	114.2	$	165.3

_______________

(1)Amount includes new operating leases and leases acquired in connection with acquisitions. For the nine months ended September 30, 2021, includes $1.4 billion related to the Telxius Acquisition (as defined in note 14).

As of September 30, 2022, the Company does not have material operating or financing leases that have not yet commenced.

Maturities of operating lease liabilities as of September 30, 2022 were as follows:

Fiscal Year	Operating Lease (1)
Remainder of 2022	$	288.8
2023	1,085.7
2024	1,031.2
2025	971.3
2026	914.8
Thereafter	6,980.9
Total lease payments	11,272.7
Less amounts representing interest	(2,940.0)
Total lease liability	8,332.7
Less current portion of lease liability	766.3
Non-current lease liability	$	7,566.4

_______________

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

XML

GOODWILL AND OTHER INTANGIBLE ASSETS

9 Months Ended

Sep. 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		(59.1)		—		(43.1)
Other (2)	(7.4)		—		—		—		—		—		—		(7.4)
Effect of foreign currency translation	(4.3)		(85.9)		(78.2)		(448.5)		3.5		—		—		(613.4)
Balance as of September 30, 2022	$	4,636.7	$	904.2	$	534.0	$	2,793.6	$	896.4	$	2,919.3	$	2.0	$	12,686.2

_______________

(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 nine months ended September 30, 2022.

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

		As of September 30, 2022						As of December 31, 2021
	Estimated Useful Lives (years)	Gross Carrying Value		Accumulated Amortization		Net Book Value		Gross Carrying Value		Accumulated Amortization		Net Book Value
Acquired network location intangibles (1)	Up to 20	$	6,045.8	$	(2,483.0)	$	3,562.8	$	6,294.6	$	(2,305.1)	$	3,989.5
Acquired tenant-related intangibles	Up to 20	19,004.1		(5,676.0)		13,328.1		20,030.5		(5,051.5)		14,979.0
Acquired licenses and other intangibles	2-20	1,791.3		(361.9)		1,429.4		1,807.9		(49.2)		1,758.7
Total other intangible assets		$	26,841.2	$	(8,520.9)	$	18,320.3	$	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 September 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 nine months ended September 30, 2022 was $378.4 million and $1.3 billion, respectively. Amortization of intangible assets for the three and nine months ended September 30, 2021 was $318.0 million and $846.2 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	$	388.9
2023	1,434.8
2024	1,346.2
2025	1,293.4
2026	1,240.5
2027	1,227.4

XML

ACCRUED EXPENSES

9 Months Ended

Sep. 30, 2022

Accrued Liabilities, Current [Abstract]

ACCRUED EXPENSES

ACCRUED EXPENSES

Accrued expenses consisted of the following:

	As of
	September 30, 2022		December 31, 2021
Accrued construction costs	$	129.9	$	197.3
Accrued income tax payable	15.3		84.8
Accrued pass-through costs	83.4		91.0
Amounts payable for acquisitions	16.7		95.2
Amounts payable to tenants	86.0		81.1
Accrued property and real estate taxes	284.3		255.3
Accrued rent	77.7		78.8
Payroll and related withholdings	126.7		124.7
Other accrued expenses	382.7		404.6
Total accrued expenses	$	1,202.7	$	1,412.8

XML

LONG-TERM OBLIGATIONS

9 Months Ended

Sep. 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
	September 30, 2022		December 31, 2021		Maturity Date
2021 Multicurrency Credit Facility (1) (2)	$	4,394.3	$	4,388.4	June 30, 2025
2021 Term Loan (1)	996.0		995.4		January 31, 2027
2021 Credit Facility (1)	705.0		1,410.0		January 31, 2027
2021 EUR Three Year Delayed Draw Term Loan (1) (2)	808.3		937.6		May 28, 2024
2021 USD 364-Day Delayed Draw Term Loan (3)	—		2,998.5		N/A
2021 USD Two Year Delayed Draw Term Loan (1)	1,499.1		1,498.4		December 28, 2023
2.250% senior notes (4)	—		600.3		N/A
3.50% senior notes	999.3		997.9		January 31, 2023
3.000% senior notes	692.7		709.9		June 15, 2023
0.600% senior notes	498.7		497.9		January 15, 2024
5.00% senior notes	1,000.6		1,000.9		February 15, 2024
3.375% senior notes	648.0		647.0		May 15, 2024
2.950% senior notes	646.0		644.7		January 15, 2025
2.400% senior notes	747.0		746.1		March 15, 2025
1.375% senior notes (5)	486.9		563.8		April 4, 2025
4.000% senior notes	746.5		745.5		June 1, 2025
1.300% senior notes	497.1		496.4		September 15, 2025
4.400% senior notes	498.0		497.6		February 15, 2026
1.600% senior notes	696.0		695.2		April 15, 2026
1.950% senior notes (5)	486.9		564.3		May 22, 2026
1.450% senior notes	594.1		593.0		September 15, 2026
3.375% senior notes	992.5		991.2		October 15, 2026

3.125% senior notes	398.5		398.3		January 15, 2027
2.750% senior notes	745.9		745.2		January 15, 2027
0.450% senior notes (5)	730.1		847.1		January 15, 2027
0.400% senior notes (5)	484.8		562.5		February 15, 2027
3.650% senior notes	642.9		—		March 15, 2027
3.55% senior notes	746.1		745.5		July 15, 2027
3.600% senior notes	694.9		694.3		January 15, 2028
0.500% senior notes (5)	728.5		845.3		January 15, 2028
1.500% senior notes	646.3		645.8		January 31, 2028
3.950% senior notes	592.3		591.6		March 15, 2029
0.875% senior notes (5)	729.9		847.3		May 21, 2029
3.800% senior notes	1,636.4		1,635.1		August 15, 2029
2.900% senior notes	743.2		742.5		January 15, 2030
2.100% senior notes	741.9		741.2		June 15, 2030
0.950% senior notes (5)	483.1		561.0		October 5, 2030
1.875% senior notes	792.1		791.4		October 15, 2030
2.700% senior notes	694.2		693.7		April 15, 2031
2.300% senior notes	691.6		691.0		September 15, 2031
1.000% senior notes (5)	630.2		731.7		January 15, 2032
4.050% senior notes	642.0		—		March 15, 2032
1.250% senior notes (5)	483.1		561.2		May 21, 2033
3.700% senior notes	592.2		592.1		October 15, 2049
3.100% senior notes	1,038.2		1,038.0		June 15, 2050
2.950% senior notes	1,022.0		1,021.5		January 15, 2051
Total American Tower Corporation debt	35,963.4		39,943.3
Series 2013-2A securities (6)	1,299.3		1,298.2		March 15, 2023
Series 2018-1A securities (6)	495.9		495.3		March 15, 2028
Series 2015-2 notes (7)	523.2		522.7		June 16, 2025
CoreSite Debt (8)	—		955.1		N/A
Other subsidiary debt (9)	18.9		8.0		Various
Total American Tower subsidiary debt	2,337.3		3,279.3
Finance lease obligations	28.4		31.6
Total	38,329.1		43,254.2
Less current portion of long-term obligations	(3,015.2)		(4,568.7)
Long-term obligations	$	35,313.9	$	38,685.5

_______________

(1)Accrues interest at a variable rate.

(2)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 during the nine months ended September 30, 2022 using proceeds from (i) the issuance of the 3.650% Notes and the 4.050% Notes (each as defined below), (ii) the June 2022 common stock offering (as further discussed in note 10), (iii) the Stonepeak Transaction (as defined and further discussed in note 11) and (iv) cash on hand.

(4)Repaid in full on January 14, 2022 using borrowings under the 2021 Credit Facility (as defined below).

(5)Notes are denominated in EUR.

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

(7)Maturity date reflects the anticipated repayment date; final legal maturity is June 15, 2050.

(8)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.

(9)Includes (a) 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, and (b) amounts due under drawn letters of credit in Nigeria (as discussed below), which are denominated in USD. 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) $1.3 billion aggregate principal amount of the Company’s Secured Tower Revenue Securities, Series 2013-2A due March 15, 2023, (ii) $1.0 billion aggregate principal amount of the Company’s 3.50% senior unsecured notes due January 31, 2023 and (iii) $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 nine months ended September 30, 2022, the Company borrowed an aggregate of $850.0 million and repaid an aggregate of $680.0 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 nine months ended September 30, 2022, the Company borrowed an aggregate of $2.7 billion and repaid an aggregate of $3.4 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. On August 11, 2022, the Company repaid all remaining amounts outstanding under the 2021 USD 364-Day Delayed Draw Term Loan using proceeds from the Stonepeak Transaction (as defined and further discussed in note 11).

As of September 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”) 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 (in millions)		Undrawn letters of credit (in millions)		Maturity Date		Current margin over LIBOR or EURIBOR (1)		Current commitment fee (2)
2021 Multicurrency Credit Facility	$	4,394.3	$	3.5	June 30, 2025	(3)	1.125	%	0.110	%
2021 Credit Facility	705.0		24.7		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	808.7		N/A		May 28, 2024		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 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.

(3)Subject to two optional renewal periods.

Nigeria Letters of Credit—During the nine months ended September 30, 2022, the Company drew on letters of credit in Nigeria. The drawn amounts bear interest at a rate equal to the Secured Overnight Financing Rate at the time of drawing plus a spread. Amounts are due 270 days from the date of drawing. As of September 30, 2022, the Company had $13.0 million outstanding under the drawn letters of credit.

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FAIR VALUE MEASUREMENTS

9 Months Ended

Sep. 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:

	September 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)	$	33.7	—		—	$	37.1	—		—
Liabilities:
Interest rate swap agreements	—		$	7.6	—	—		—		—
Fair value of debt related to interest rate swap agreements (2)	$	(6.4)	—		—	$	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 nine months ended September 30, 2022, the Company recognized unrealized gains (losses) of $4.4 million and $(3.4) million, respectively, for equity securities held as of September 30, 2022.

(2)Included in the carrying values of the corresponding debt obligations.

During the nine months ended September 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 September 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 nine months ended September 30, 2022 and 2021. There were no other items measured at fair value on a nonrecurring basis during the three and nine months ended September 30, 2022 or 2021.

Fair Value of Financial Instruments—The Company’s financial instruments for which the carrying value reasonably approximates fair value at September 30, 2022 and December 31, 2021 include cash and cash equivalents, restricted cash, accounts receivable and accounts payable. The Company’s estimates of fair value of its long-term obligations, including the current portion, are based primarily upon reported market values. For long-term debt not actively traded, fair value is estimated using either indicative price quotes or a discounted cash flow analysis using rates for debt with similar terms and maturities. As of September 30, 2022 and December 31, 2021, the carrying value of long-term obligations, including the current portion, was $38.3 billion and $43.3 billion, respectively. As of September 30, 2022, the fair value of long-term obligations, including the current portion, was $34.3 billion, of which $23.6 billion was measured using Level 1 inputs and $10.7 billion was measured using Level 2 inputs. As of December 31, 2021, the fair value of long-term obligations, including the current portion, was $44.1 billion, of which $28.5 billion was measured using Level 1 inputs and $15.6 billion was measured using Level 2 inputs.

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INCOME TAXES

9 Months Ended

Sep. 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 nine months ended September 30, 2022 were primarily attributable to fewer additions to reserves for the Company’s existing tax positions and reduced earnings in certain foreign jurisdictions. The decrease in the income tax provision during the nine months ended September 30, 2022 also included the reversal of valuation allowances of $79.7 million in certain jurisdictions, as compared to a reversal of $8.8 million during the nine months ended September 30, 2021. 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 September 30, 2022 and December 31, 2021, the total unrecognized tax benefits that would impact the ETR, if recognized, were approximately $99.7 million and $94.8 million, respectively. The amount of unrecognized tax benefits during the three and nine months ended September 30, 2022 includes (i) additions to the Company’s existing tax positions of $2.2 million and $11.8 million, respectively, including remeasurements of acquired liabilities of $3.5 million for the nine months ended September 30, 2022, (ii) reductions due to foreign currency exchange rate fluctuations of $3.9 million and $6.3 million, respectively, and (iii) reductions due to settlements of $1.6 million. 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 $23.3 million.

The Company recorded the following penalties and income tax-related interest expense during the three and nine months ended September 30, 2022 and 2021:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Penalties and income tax-related interest expense (1)	$	3.7	$	9.6	$	15.2	$	43.1

_______________

(1)Nine months ended September 30, 2021 reflects an increase of $16.6 million due to a reclassification of unrecognized tax benefits to penalties and income tax-related interest expense.

As of September 30, 2022 and December 31, 2021, the total amount of accrued income tax related interest and penalties included in the consolidated balance sheets were $52.8 million and $42.3 million, respectively.

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STOCK-BASED COMPENSATION

9 Months Ended

Sep. 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 September 30, 2022, the Company had the ability to grant stock-based awards with respect to an aggregate of 5.2 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 nine months ended September 30, 2022 and 2021, the Company recorded the following stock-based compensation expense in selling, general, administrative and development expense:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Stock-based compensation expense	$	39.2	$	28.1	$	138.1	$	98.0

Stock Options—As of September 30, 2022, there was no unrecognized compensation expense related to unvested stock options.

The Company’s option activity for the nine months ended September 30, 2022 was as follows (shares disclosed in full amounts):

	Number of Options
Outstanding as of January 1, 2022	1,067,999
Exercised	(157,168)
Forfeited	—
Expired	—
Outstanding as of September 30, 2022	910,831

Restricted Stock Units—As of September 30, 2022, total unrecognized compensation expense related to unvested RSUs granted under the 2007 Plan, including the CoreSite Replacement Awards (as defined below), was $199.7 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 September 30, 2022, total unrecognized compensation expense related to the CoreSite Replacement Awards was $9.8 million and is expected to be recognized over a weighted average period of approximately one year.

Performance-Based Restricted Stock Units—During the nine months ended September 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 nine months ended September 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)	(537,264)	(98,188)
Forfeited	(61,586)	—
Outstanding as of September 30, 2022	1,401,606	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.

During the three and nine months ended September 30, 2022, the Company recorded $8.3 million and $26.6 million, respectively, in stock-based compensation expense for equity awards in which the performance goals have been established and were probable of being achieved. The remaining unrecognized compensation expense related to these awards at September 30, 2022 was $8.6 million based on the Company’s current assessment of the probability of achieving the performance goals. The weighted average period over which the cost will be recognized is approximately two years.

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EQUITY

9 Months Ended

Sep. 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 nine months ended September 30, 2022, the Company received an aggregate of $21.0 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 September 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 nine months ended September 30, 2022, there were no repurchases under either of the Buyback Programs. As of September 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 September 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 nine months ended September 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
September 21, 2022	October 26, 2022	October 11, 2022	$	1.47	$	684.4
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 nine months ended September 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
September 16, 2021	October 15, 2021	September 28, 2021	$	1.31	$	596.6
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.

The Company accrues distributions on unvested restricted stock units, which are payable upon vesting. As of September 30, 2022, the amount accrued for distributions payable related to unvested restricted stock units was $13.5 million. During the nine months ended September 30, 2022 and 2021, the Company paid $6.8 million and $7.5 million of distributions upon the vesting of restricted stock units, respectively. To maintain its qualification for taxation as a REIT, the Company expects to continue paying distributions, the amount, timing and frequency of which will be determined, and subject to adjustment, by the Company’s Board of Directors.

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NONCONTROLLING INTERESTS

9 Months Ended

Sep. 30, 2022

Noncontrolling Interest [Abstract]

NONCONTROLLING INTERESTS

NONCONTROLLING INTERESTS

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 September 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.

Stonepeak Transaction—In July 2022, the Company entered into an agreement with certain investment vehicles affiliated with Stonepeak Partners LP (such investment vehicles, collectively, “Stonepeak”) for Stonepeak to acquire a 29% noncontrolling ownership interest in the Company’s U.S. data center business. The transaction was completed in August 2022 for total aggregate consideration of $2.5 billion, through an investment in common equity of $1,750.0 million and mandatorily convertible preferred equity of $750.0 million (the “Stonepeak Transaction”).

As of September 30, 2022, the Company holds a common equity interest of approximately 77% in its U.S. data center business, with Stonepeak holding approximately 23% of the outstanding common equity and 100% of the outstanding mandatorily convertible preferred equity. On a fully converted basis, which is expected to occur four years from the date of closing in August 2022, 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%. The mandatorily convertible preferred equity, which accrues dividends at 5.0%, will convert into common equity on a one for one basis, subject to adjustment that will be measured on the conversion date.

Subsequent to September 30, 2022, Stonepeak acquired additional noncontrolling ownership interests in the Company’s U.S. data center business, as further discussed in note 16.

Dividends to noncontrolling interests— Certain of the Company’s subsidiaries may, from time to time, declare dividends. In December 2021, AT Iberia C.V., one of the Company’s subsidiaries in Spain, 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.

In August 2022, AT Rhine C.V., one of the Company’s subsidiaries in Germany, declared and paid a dividend of 25.0 million EUR (approximately $25.1 million at the date of payment), pursuant to the terms of the ownership agreements, to ATC Europe and PGGM in proportion to their respective equity interests in AT Rhine C.V.

As of September 30, 2022, the amount accrued for distributions payable related to the outstanding Stonepeak mandatorily convertible preferred equity was $5.5 million.

The changes in noncontrolling interests were as follows:

	Nine Months Ended September 30,
	2022		2021
Balance as of January 1,	$	3,988.4	$	474.9
ATC Europe Transactions (1)	—		3,078.2
Bangladesh partnership (2)	—		10.2
Stonepeak Transaction (3)	2,500.0		—
Adjustment to noncontrolling interest due to reorganization (4)	—		601.0
Redemption of noncontrolling interest (5)	—		(1.7)
Net (loss) income attributable to noncontrolling interests (6)	(36.3)		6.9
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax	(458.6)		(103.3)
Contributions from noncontrolling interest holders	52.6		—
Distributions to noncontrolling interest holders (6)	(9.3)		(0.4)
Balance as of September 30,	$	6,036.8	$	4,065.8

_______________

(1)Represents the impact of contributions received from CDPQ and Allianz described above on Noncontrolling interests as of September 30, 2021. Reflected within Contributions from noncontrolling interest holders in the consolidated statements of equity.

(2)Represents the impact of contributions made by the Company to establish the joint venture in Bangladesh described above on Noncontrolling interests as of September 30, 2021. Reflected within Purchase of noncontrolling interest in the consolidated statements of equity.

(3)Represents the impact of contributions received from Stonepeak described above on Noncontrolling interests as of September 30, 2022. Reflected within Contributions from noncontrolling interest holders in the consolidated statements of equity.

(4)Represents the impact of the reorganization of European interests described above on Noncontrolling interests.

(5)Represents the impact of the purchase of interests described above on Noncontrolling interests.

(6)For the nine months ended September 30, 2022, primarily includes $5.5 million of distributions payable related to the outstanding Stonepeak mandatorily convertible preferred equity and a dividend of $3.2 million paid to PGGM.

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EARNINGS PER COMMON SHARE

9 Months Ended

Sep. 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 September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Net income attributable to American Tower Corporation common stockholders	$	839.7	$	723.0	$	2,449.6	$	2,114.3
Basic weighted average common shares outstanding	465,594		455,224		460,141		450,148
Dilutive securities	1,207		1,753		1,219		1,833
Diluted weighted average common shares outstanding	466,801		456,977		461,360		451,981
Basic net income attributable to American Tower Corporation common stockholders per common share	$	1.80	$	1.59	$	5.32	$	4.70
Diluted net income attributable to American Tower Corporation common stockholders per common share	$	1.80	$	1.58	$	5.31	$	4.68

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 September 30,		Nine Months Ended September 30,
	2022	2021	2022	2021
Restricted stock units	—	—	88	—

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COMMITMENTS AND CONTINGENCIES

9 Months Ended

Sep. 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 September 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.

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ACQUISITIONS

9 Months Ended

Sep. 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 nine months ended September 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 nine months ended September 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 September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Acquisition and merger related expenses	$	29.0	$	25.3	$	38.2	$	88.8
Integration costs	$	14.0	$	6.9	$	38.8	$	32.9

During the nine months ended September 30, 2022 and 2021, the Company also recorded benefits of $8.5 million and $4.4 million, respectively, related to pre-acquisition contingencies and settlements. The three and nine months ended September 30, 2022 included acquisition and merger related costs associated with the Stonepeak Transaction. The three and nine months ended September 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 nine months ended September 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 nine months ended September 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. This acquisition is being accounted for as an asset acquisition and is included in the table below in “Other.”

Other Acquisitions—During the nine months ended September 30, 2022, the Company acquired a total of 258 communications sites, as well as other communications infrastructure assets, in the United States, Canada, France, Mexico, Nigeria and Poland, including 208 communications sites in connection with the Company’s agreement with Orange S.A. (“Orange”), as further described below, for an aggregate purchase price of $174.2 million. Of the aggregate purchase price, $11.6 million is reflected as a payable in the consolidated balance sheet as of September 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	$	33.3
Property and equipment	113.6
Intangible assets (1):
Tenant-related intangible assets	143.7
Network location intangible assets	18.8
Other intangible assets	—
Other non-current assets	18.7
Current liabilities	(1.1)
Deferred tax liability	—
Other non-current liabilities	(24.0)
Net assets acquired	303.0
Goodwill	—
Fair value of net assets acquired	303.0
Purchase price	$	303.0

_______________

(1)Tenant-related intangible assets and network location intangible assets are amortized on a straight-line basis over the estimated useful lives of the assets.

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 208 communications sites acquired during the nine months ended September 30, 2022, the Company acquired 1,197 of these communications sites during the years ended December 31, 2020 and 2021. Subsequent to September 30, 2022, the Company completed the acquisition of an additional 75 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, 255.5 million EUR (approximately $250.5 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 September 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 September 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 over the estimated useful lives of the assets.

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 September 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)		(154.8)
Deferred tax liability	—		—
Other non-current liabilities	(323.1)		(340.6)
Net assets acquired	7,456.0		$	7,515.1
Goodwill	2,943.3		2,884.2
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 over a 10 year period. Other intangible assets are amortized on a straight-line basis over the estimated useful lives of the assets.

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 September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Pro forma revenues	$	2,671.9	$	2,638.7	$	8,011.7	$	7,749.4
Pro forma net income attributable to American Tower Corporation common stockholders	$	839.4	$	574.6	$	2,449.2	$	1,708.9
Pro forma net income per common share amounts:
Basic net income attributable to American Tower Corporation common stockholders	$	1.80	$	1.24	$	5.26	$	3.68
Diluted net income attributable to American Tower Corporation common stockholders	$	1.80	$	1.23	$	5.25	$	3.67

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BUSINESS SEGMENTS

9 Months Ended

Sep. 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. The Company has historically reported these operations on a geographic basis.

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 September 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 nine months ended September 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  Property		Services		Other		Total
Three Months Ended September 30, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	1,259.2	$	249.2	$	303.4	$	184.0	$	420.4	$	193.7	$	2,609.9	$	61.6			$	2,671.5
Segment operating expenses	219.0		171.8		119.8		83.0		131.5		83.7		808.8		27.7				836.5
Segment gross margin	1,040.2		77.4		183.6		101.0		288.9		110.0		1,801.1		33.9				1,835.0
Segment selling, general, administrative and development expense (1)	48.0		10.9		19.4		12.4		26.7		15.8		133.2		5.5				138.7
Segment operating profit	$	992.2	$	66.5	$	164.2	$	88.6	$	262.2	$	94.2	$	1,667.9	$	28.4			$	1,696.3
Stock-based compensation expense																	$	39.2	39.2
Other selling, general, administrative and development expense																	53.3		53.3
Depreciation, amortization and accretion																	898.1		898.1
Other income (2)																	(150.1)		(150.1)
Income from continuing operations before income taxes																			$	855.8
Total assets	$	26,749.3	$	4,799.6	$	4,592.6	$	10,513.7	$	8,477.7	$	10,750.8	$	65,883.7	$	96.9	$	532.2	$	66,512.8

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $39.2 million.

(2)Primarily includes gains from foreign currency exchange rate fluctuations, partially offset by interest expense.

	Property												Total  Property		Services		Other		Total
Three Months Ended September 30, 2021	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	1,228.5	$	313.5	$	257.4	$	175.8	$	391.0	$	2.7	$	2,368.9	$	85.4			$	2,454.3
Segment operating expenses	220.2		187.1		88.2		73.0		123.7		1.2		693.4		30.9				724.3
Segment gross margin	1,008.3		126.4		169.2		102.8		267.3		1.5		1,675.5		54.5				1,730.0
Segment selling, general, administrative and development expense (1)	47.0		21.5		16.5		12.8		26.3		1.1		125.2		3.8				129.0
Segment operating profit	$	961.3	$	104.9	$	152.7	$	90.0	$	241.0	$	0.4	$	1,550.3	$	50.7			$	1,601.0
Stock-based compensation expense																	$	28.1	28.1
Other selling, general, administrative and development expense																	48.8		48.8
Depreciation, amortization and accretion																	611.4		611.4
Other expense (2)																	135.1		135.1
Income from continuing operations before income taxes																			$	777.6
Total assets	$	27,281.2	$	5,164.2	$	4,965.4	$	12,123.2	$	8,764.1	$	93.8	$	58,391.9	$	100.9	$	2,037.2	$	60,530.0

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $28.1 million.

(2)Primarily includes interest expense, partially offset by gains from foreign currency exchange rate fluctuations.

	Property												Total  Property		Services		Other		Total
Nine Months Ended September 30, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	3,727.5	$	845.7	$	856.7	$	561.3	$	1,264.9	$	569.1	$	7,825.2	$	180.9			$	8,006.1
Segment operating expenses	631.4		528.6		329.4		250.6		395.0		239.3		2,374.3		84.5				2,458.8
Segment gross margin	3,096.1		317.1		527.3		310.7		869.9		329.8		5,450.9		96.4				5,547.3
Segment selling, general, administrative and development expense (1)	134.3		64.9		63.9		41.4		81.4		47.7		433.6		16.6				450.2
Segment operating profit	$	2,961.8	$	252.2	$	463.4	$	269.3	$	788.5	$	282.1	$	5,017.3	$	79.8			$	5,097.1
Stock-based compensation expense																	$	138.1	138.1
Other selling, general, administrative and development expense																	159.7		159.7
Depreciation, amortization and accretion																	2,540.4		2,540.4
Other income (2)																	(220.4)		(220.4)
Income from continuing operations before income taxes																			$	2,479.3

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $138.1 million.

(2)Primarily includes gains from foreign currency exchange rate fluctuations, partially offset by interest expense.

	Property												Total  Property		Services		Other		Total
Nine Months Ended September 30, 2021	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	3,688.2	$	893.1	$	741.1	$	308.2	$	1,093.3	$	7.7	$	6,731.6	$	180.1			$	6,911.7
Segment operating expenses	628.0		546.4		254.8		110.7		337.0		3.1		1,880.0		66.5				1,946.5
Segment gross margin	3,060.2		346.7		486.3		197.5		756.3		4.6		4,851.6		113.6				4,965.2
Segment selling, general, administrative and development expense (1)	126.4		52.7		52.9		26.3		79.6		3.4		341.3		12.1				353.4
Segment operating profit	$	2,933.8	$	294.0	$	433.4	$	171.2	$	676.7	$	1.2	$	4,510.3	$	101.5			$	4,611.8
Stock-based compensation expense																	$	98.0	98.0
Other selling, general, administrative and development expense																	144.3		144.3
Depreciation, amortization and accretion																	1,688.7		1,688.7
Other expense (2)																	379.9		379.9
Income from continuing operations before income taxes																			$	2,300.9

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $98.0 million.

(2)Primarily includes interest expense, partially offset by gains from foreign currency exchange rate fluctuations.

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SUBSEQUENT EVENTS

9 Months Ended

Sep. 30, 2022

Subsequent Events [Abstract]

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS

Stonepeak Additional Investment—In October 2022, the Company entered into an agreement with Stonepeak for Stonepeak to acquire additional common equity and mandatorily preferred equity interests in the Company’s U.S. data center business for total aggregate consideration of $570.0 million. The transaction was completed on October 20, 2022. The Company used the proceeds to repay existing indebtedness under the 2021 Multicurrency Credit Facility.

After the completion of the transaction, the Company holds a common equity interest of approximately 72% in its U.S. data center business, with Stonepeak holding approximately 28% of the outstanding common equity and 100% of the outstanding mandatorily convertible preferred equity. On a fully converted basis, which is expected to occur four years from the date of the initial closing in August 2022, and on the basis of the currently outstanding equity, the Company will hold a controlling ownership interest of approximately 64%, with Stonepeak holding approximately 36%.

Vodafone Idea—On October 21, 2022, a subsidiary of the Company, ATC Telecom Infrastructure Private Limited (“ATC TIPL”), and Vodafone Idea Limited (“VIL”) notified the stock exchange of India that both parties have board approvals in relation to an issuance of convertible debentures pursuant to which, in exchange for VIL’s payment of certain amounts towards accounts receivables, ATC TIPL shall pay equivalent amounts towards subscription to convertible debentures issued by VIL. The convertible debentures are to be repaid by VIL with interest and ATC TIPL has the option to convert the debentures into equity of VIL. The issuance of the debentures is subject to certain conditions precedent.

New Zealand Acquisition—On October 25, 2022, the Company, through its recently formed New Zealand subsidiary, acquired land under carrier or other third-party communications sites in New Zealand from Clearspan Pty Ltd for total consideration of approximately 50 million New Zealand Dollars (approximately $29 million at the date of closing).

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)

9 Months Ended

Sep. 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 the space in its data center facilities (the “lease component”) and from the reimbursement of costs incurred by the Company in operating the communications sites and data center facilities and supporting its

customers’ equipment as well as other services and contractual rights (the “non-lease component”). Most of the Company’s revenue is derived from leasing arrangements and is accounted for as lease revenue unless the timing and pattern of revenue recognition of the non-lease component differs from the lease component. If the timing and pattern of the non-lease component revenue recognition differs from that of the lease component, the Company separately determines the stand-alone selling prices and pattern of revenue recognition for each performance obligation. Revenue related to distributed antenna system (“DAS”) networks and fiber and other related assets results from agreements with customers that are generally not accounted for as leases.

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

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.

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Tables)

9 Months Ended

Sep. 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:

	Nine Months Ended September 30,
	2022		2021
Cash and cash equivalents	$	2,121.8	$	3,277.2
Restricted cash	127.8		422.1
Total cash, cash equivalents and restricted cash	$	2,249.6	$	3,699.3

Schedule of Revenue Disaggregated by Source and Geography

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

Three Months Ended September 30, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers (1)		Total
Non-lease property revenue	$	74.3	$	4.1	$	6.5	$	8.3	$	39.0	$	26.8	$	159.0
Services revenue	61.6		—		—		—		—		—		61.6
Total non-lease revenue	$	135.9	$	4.1	$	6.5	$	8.3	$	39.0	$	26.8	$	220.6
Property lease revenue	1,184.9		245.1		296.9		175.7		381.4		166.9		2,450.9
Total revenue	$	1,320.8	$	249.2	$	303.4	$	184.0	$	420.4	$	193.7	$	2,671.5

Three Months Ended September 30, 2021	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers (1)		Total
Non-lease property revenue	$	73.2	$	2.6	$	6.3	$	2.1	$	35.1	$	—	$	119.3
Services revenue	85.4		—		—		—		—		—		85.4
Total non-lease revenue	$	158.6	$	2.6	$	6.3	$	2.1	$	35.1	$	—	$	204.7
Property lease revenue	1,155.3		310.9		251.1		173.7		355.9		2.7		2,249.6
Total revenue	$	1,313.9	$	313.5	$	257.4	$	175.8	$	391.0	$	2.7	$	2,454.3

Nine Months Ended September 30, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers (1)		Total
Non-lease property revenue	$	222.3	$	12.0	$	20.7	$	17.5	$	114.9	$	78.6	$	466.0
Services revenue	180.9		—		—		—		—		—		180.9
Total non-lease revenue	$	403.2	$	12.0	$	20.7	$	17.5	$	114.9	$	78.6	$	646.9
Property lease revenue	3,505.2		833.7		836.0		543.8		1,150.0		490.5		7,359.2
Total revenue	$	3,908.4	$	845.7	$	856.7	$	561.3	$	1,264.9	$	569.1	$	8,006.1

Nine Months Ended September 30, 2021	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers (1)		Total
Non-lease property revenue	$	214.9	$	6.8	$	17.5	$	6.0	$	100.9	$	—	$	346.1
Services revenue	180.1		—		—		—		—		—		180.1
Total non-lease revenue	$	395.0	$	6.8	$	17.5	$	6.0	$	100.9	$	—	$	526.2
Property lease revenue	3,473.3		886.3		723.6		302.2		992.4		7.7		6,385.5
Total revenue	$	3,868.3	$	893.1	$	741.1	$	308.2	$	1,093.3	$	7.7	$	6,911.7

_______________

(1)Data Centers consists of the Company’s data center facilities located in the United States. For the three and nine months ended September 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.

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PREPAID AND OTHER CURRENT ASSETS (Tables)

9 Months Ended

Sep. 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
	September 30, 2022		December 31, 2021
Prepaid assets	$	129.4	$	94.5
Prepaid income tax	157.5		128.6
Unbilled receivables	304.4		269.6
Value added tax and other consumption tax receivables	92.2		83.9
Other miscellaneous current assets	103.5		80.6
Prepaid and other current assets	$	787.0	$	657.2

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LEASES (Tables)

9 Months Ended

Sep. 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 September 30, 2022 were as follows:

Fiscal Year	Amount (1)
Remainder of 2022	$	1,675.7
2023	7,397.6
2024	7,121.1
2025	6,715.1
2026	6,284.5
Thereafter	33,155.8
Total	$	62,349.8

_______________

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

Schedule of Information About Other Lease-related Balances

Information about other lease-related balances is as follows:

	As of
	September 30, 2022		December 31, 2021
Operating leases:
Right-of-use asset	$	8,857.5	$	9,225.1
Current portion of lease liability	$	766.3	$	712.6
Lease liability	7,566.4		8,041.8
Total operating lease liability	$	8,332.7	$	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
	September 30, 2022		December 31, 2021
Operating leases:
Weighted-average remaining lease term (years)	12.3		13.0
Weighted-average incremental borrowing rate	5.2	%	5.1	%

The following table sets forth the components of lease cost:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Operating lease cost	$	309.1	$	295.6	$	919.8	$	815.3
Variable lease costs not included in lease liability (1)	92.3		94.3		290.0		248.7

______________

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

Supplemental cash flow information is as follows:

	Nine Months Ended September 30,
	2022		2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(916.0)	$	(798.2)
Non-cash items:
New operating leases (1)	$	289.9	$	1,607.2
Operating lease modifications and reassessments	$	114.2	$	165.3

_______________

(1)Amount includes new operating leases and leases acquired in connection with acquisitions. For the nine months ended September 30, 2021, includes $1.4 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 September 30, 2022 were as follows:

Fiscal Year	Operating Lease (1)
Remainder of 2022	$	288.8
2023	1,085.7
2024	1,031.2
2025	971.3
2026	914.8
Thereafter	6,980.9
Total lease payments	11,272.7
Less amounts representing interest	(2,940.0)
Total lease liability	8,332.7
Less current portion of lease liability	766.3
Non-current lease liability	$	7,566.4

_______________

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

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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

9 Months Ended

Sep. 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		(59.1)		—		(43.1)
Other (2)	(7.4)		—		—		—		—		—		—		(7.4)
Effect of foreign currency translation	(4.3)		(85.9)		(78.2)		(448.5)		3.5		—		—		(613.4)
Balance as of September 30, 2022	$	4,636.7	$	904.2	$	534.0	$	2,793.6	$	896.4	$	2,919.3	$	2.0	$	12,686.2

_______________

(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 nine months ended September 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 September 30, 2022						As of December 31, 2021
	Estimated Useful Lives (years)	Gross Carrying Value		Accumulated Amortization		Net Book Value		Gross Carrying Value		Accumulated Amortization		Net Book Value
Acquired network location intangibles (1)	Up to 20	$	6,045.8	$	(2,483.0)	$	3,562.8	$	6,294.6	$	(2,305.1)	$	3,989.5
Acquired tenant-related intangibles	Up to 20	19,004.1		(5,676.0)		13,328.1		20,030.5		(5,051.5)		14,979.0
Acquired licenses and other intangibles	2-20	1,791.3		(361.9)		1,429.4		1,807.9		(49.2)		1,758.7
Total other intangible assets		$	26,841.2	$	(8,520.9)	$	18,320.3	$	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	$	388.9
2023	1,434.8
2024	1,346.2
2025	1,293.4
2026	1,240.5
2027	1,227.4

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ACCRUED EXPENSES (Tables)

9 Months Ended

Sep. 30, 2022

Accrued Liabilities, Current [Abstract]

Schedule of Accrued Expenses

Accrued expenses consisted of the following:

	As of
	September 30, 2022		December 31, 2021
Accrued construction costs	$	129.9	$	197.3
Accrued income tax payable	15.3		84.8
Accrued pass-through costs	83.4		91.0
Amounts payable for acquisitions	16.7		95.2
Amounts payable to tenants	86.0		81.1
Accrued property and real estate taxes	284.3		255.3
Accrued rent	77.7		78.8
Payroll and related withholdings	126.7		124.7
Other accrued expenses	382.7		404.6
Total accrued expenses	$	1,202.7	$	1,412.8

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LONG-TERM OBLIGATIONS (Tables)

9 Months Ended

Sep. 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
	September 30, 2022		December 31, 2021		Maturity Date
2021 Multicurrency Credit Facility (1) (2)	$	4,394.3	$	4,388.4	June 30, 2025
2021 Term Loan (1)	996.0		995.4		January 31, 2027
2021 Credit Facility (1)	705.0		1,410.0		January 31, 2027
2021 EUR Three Year Delayed Draw Term Loan (1) (2)	808.3		937.6		May 28, 2024
2021 USD 364-Day Delayed Draw Term Loan (3)	—		2,998.5		N/A
2021 USD Two Year Delayed Draw Term Loan (1)	1,499.1		1,498.4		December 28, 2023
2.250% senior notes (4)	—		600.3		N/A
3.50% senior notes	999.3		997.9		January 31, 2023
3.000% senior notes	692.7		709.9		June 15, 2023
0.600% senior notes	498.7		497.9		January 15, 2024
5.00% senior notes	1,000.6		1,000.9		February 15, 2024
3.375% senior notes	648.0		647.0		May 15, 2024
2.950% senior notes	646.0		644.7		January 15, 2025
2.400% senior notes	747.0		746.1		March 15, 2025
1.375% senior notes (5)	486.9		563.8		April 4, 2025
4.000% senior notes	746.5		745.5		June 1, 2025
1.300% senior notes	497.1		496.4		September 15, 2025
4.400% senior notes	498.0		497.6		February 15, 2026
1.600% senior notes	696.0		695.2		April 15, 2026
1.950% senior notes (5)	486.9		564.3		May 22, 2026
1.450% senior notes	594.1		593.0		September 15, 2026
3.375% senior notes	992.5		991.2		October 15, 2026

3.125% senior notes	398.5		398.3		January 15, 2027
2.750% senior notes	745.9		745.2		January 15, 2027
0.450% senior notes (5)	730.1		847.1		January 15, 2027
0.400% senior notes (5)	484.8		562.5		February 15, 2027
3.650% senior notes	642.9		—		March 15, 2027
3.55% senior notes	746.1		745.5		July 15, 2027
3.600% senior notes	694.9		694.3		January 15, 2028
0.500% senior notes (5)	728.5		845.3		January 15, 2028
1.500% senior notes	646.3		645.8		January 31, 2028
3.950% senior notes	592.3		591.6		March 15, 2029
0.875% senior notes (5)	729.9		847.3		May 21, 2029
3.800% senior notes	1,636.4		1,635.1		August 15, 2029
2.900% senior notes	743.2		742.5		January 15, 2030
2.100% senior notes	741.9		741.2		June 15, 2030
0.950% senior notes (5)	483.1		561.0		October 5, 2030
1.875% senior notes	792.1		791.4		October 15, 2030
2.700% senior notes	694.2		693.7		April 15, 2031
2.300% senior notes	691.6		691.0		September 15, 2031
1.000% senior notes (5)	630.2		731.7		January 15, 2032
4.050% senior notes	642.0		—		March 15, 2032
1.250% senior notes (5)	483.1		561.2		May 21, 2033
3.700% senior notes	592.2		592.1		October 15, 2049
3.100% senior notes	1,038.2		1,038.0		June 15, 2050
2.950% senior notes	1,022.0		1,021.5		January 15, 2051
Total American Tower Corporation debt	35,963.4		39,943.3
Series 2013-2A securities (6)	1,299.3		1,298.2		March 15, 2023
Series 2018-1A securities (6)	495.9		495.3		March 15, 2028
Series 2015-2 notes (7)	523.2		522.7		June 16, 2025
CoreSite Debt (8)	—		955.1		N/A
Other subsidiary debt (9)	18.9		8.0		Various
Total American Tower subsidiary debt	2,337.3		3,279.3
Finance lease obligations	28.4		31.6
Total	38,329.1		43,254.2
Less current portion of long-term obligations	(3,015.2)		(4,568.7)
Long-term obligations	$	35,313.9	$	38,685.5

_______________

(1)Accrues interest at a variable rate.

(2)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 during the nine months ended September 30, 2022 using proceeds from (i) the issuance of the 3.650% Notes and the 4.050% Notes (each as defined below), (ii) the June 2022 common stock offering (as further discussed in note 10), (iii) the Stonepeak Transaction (as defined and further discussed in note 11) and (iv) cash on hand.

(4)Repaid in full on January 14, 2022 using borrowings under the 2021 Credit Facility (as defined below).

(5)Notes are denominated in EUR.

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

(7)Maturity date reflects the anticipated repayment date; final legal maturity is June 15, 2050.

(8)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.

(9)Includes (a) 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, and (b) amounts due under drawn letters of credit in Nigeria (as discussed below), which are denominated in USD. 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 September 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”) 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 (in millions)		Undrawn letters of credit (in millions)		Maturity Date		Current margin over LIBOR or EURIBOR (1)		Current commitment fee (2)
2021 Multicurrency Credit Facility	$	4,394.3	$	3.5	June 30, 2025	(3)	1.125	%	0.110	%
2021 Credit Facility	705.0		24.7		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	808.7		N/A		May 28, 2024		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 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.

(3)Subject to two optional renewal periods.

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FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 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:

	September 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)	$	33.7	—		—	$	37.1	—		—
Liabilities:
Interest rate swap agreements	—		$	7.6	—	—		—		—
Fair value of debt related to interest rate swap agreements (2)	$	(6.4)	—		—	$	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 nine months ended September 30, 2022, the Company recognized unrealized gains (losses) of $4.4 million and $(3.4) million, respectively, for equity securities held as of September 30, 2022.

(2)Included in the carrying values of the corresponding debt obligations.

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INCOME TAXES (Tables)

9 Months Ended

Sep. 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 nine months ended September 30, 2022 and 2021:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Penalties and income tax-related interest expense (1)	$	3.7	$	9.6	$	15.2	$	43.1

_______________

(1)Nine months ended September 30, 2021 reflects an increase of $16.6 million due to a reclassification of unrecognized tax benefits to penalties and income tax-related interest expense.

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STOCK-BASED COMPENSATION (Tables)

9 Months Ended

Sep. 30, 2022

Share-Based Payment Arrangement [Abstract]

Schedule of Stock-Based Compensation Expenses

During the three and nine months ended September 30, 2022 and 2021, the Company recorded the following stock-based compensation expense in selling, general, administrative and development expense:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Stock-based compensation expense	$	39.2	$	28.1	$	138.1	$	98.0

Schedule of Option Activity

The Company’s option activity for the nine months ended September 30, 2022 was as follows (shares disclosed in full amounts):

	Number of Options
Outstanding as of January 1, 2022	1,067,999
Exercised	(157,168)
Forfeited	—
Expired	—
Outstanding as of September 30, 2022	910,831

Schedule of RSU and PSU Activity

The Company’s RSU and PSU activity for the nine months ended September 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)	(537,264)	(98,188)
Forfeited	(61,586)	—
Outstanding as of September 30, 2022	1,401,606	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.

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EQUITY (Tables)

9 Months Ended

Sep. 30, 2022

Equity [Abstract]

Schedule of Dividends Declared

During the nine months ended September 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
September 21, 2022	October 26, 2022	October 11, 2022	$	1.47	$	684.4
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 nine months ended September 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
September 16, 2021	October 15, 2021	September 28, 2021	$	1.31	$	596.6
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.

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NONCONTROLLING INTERESTS (Tables)

9 Months Ended

Sep. 30, 2022

Noncontrolling Interest [Abstract]

Schedule of Changes in Noncontrolling Interests

The changes in noncontrolling interests were as follows:

	Nine Months Ended September 30,
	2022		2021
Balance as of January 1,	$	3,988.4	$	474.9
ATC Europe Transactions (1)	—		3,078.2
Bangladesh partnership (2)	—		10.2
Stonepeak Transaction (3)	2,500.0		—
Adjustment to noncontrolling interest due to reorganization (4)	—		601.0
Redemption of noncontrolling interest (5)	—		(1.7)
Net (loss) income attributable to noncontrolling interests (6)	(36.3)		6.9
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax	(458.6)		(103.3)
Contributions from noncontrolling interest holders	52.6		—
Distributions to noncontrolling interest holders (6)	(9.3)		(0.4)
Balance as of September 30,	$	6,036.8	$	4,065.8

_______________

(1)Represents the impact of contributions received from CDPQ and Allianz described above on Noncontrolling interests as of September 30, 2021. Reflected within Contributions from noncontrolling interest holders in the consolidated statements of equity.

(2)Represents the impact of contributions made by the Company to establish the joint venture in Bangladesh described above on Noncontrolling interests as of September 30, 2021. Reflected within Purchase of noncontrolling interest in the consolidated statements of equity.

(3)Represents the impact of contributions received from Stonepeak described above on Noncontrolling interests as of September 30, 2022. Reflected within Contributions from noncontrolling interest holders in the consolidated statements of equity.

(4)Represents the impact of the reorganization of European interests described above on Noncontrolling interests.

(5)Represents the impact of the purchase of interests described above on Noncontrolling interests.

(6)For the nine months ended September 30, 2022, primarily includes $5.5 million of distributions payable related to the outstanding Stonepeak mandatorily convertible preferred equity and a dividend of $3.2 million paid to PGGM.

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EARNINGS PER COMMON SHARE (Tables)

9 Months Ended

Sep. 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 September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Net income attributable to American Tower Corporation common stockholders	$	839.7	$	723.0	$	2,449.6	$	2,114.3
Basic weighted average common shares outstanding	465,594		455,224		460,141		450,148
Dilutive securities	1,207		1,753		1,219		1,833
Diluted weighted average common shares outstanding	466,801		456,977		461,360		451,981
Basic net income attributable to American Tower Corporation common stockholders per common share	$	1.80	$	1.59	$	5.32	$	4.70
Diluted net income attributable to American Tower Corporation common stockholders per common share	$	1.80	$	1.58	$	5.31	$	4.68

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 September 30,		Nine Months Ended September 30,
	2022	2021	2022	2021
Restricted stock units	—	—	88	—

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ACQUISITIONS (Tables)

9 Months Ended

Sep. 30, 2022

Business Combination and Asset Acquisition [Abstract]

Schedule of Merger and Acquisition Related Costs

During the three and nine months ended September 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 September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Acquisition and merger related expenses	$	29.0	$	25.3	$	38.2	$	88.8
Integration costs	$	14.0	$	6.9	$	38.8	$	32.9

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	$	33.3
Property and equipment	113.6
Intangible assets (1):
Tenant-related intangible assets	143.7
Network location intangible assets	18.8
Other intangible assets	—
Other non-current assets	18.7
Current liabilities	(1.1)
Deferred tax liability	—
Other non-current liabilities	(24.0)
Net assets acquired	303.0
Goodwill	—
Fair value of net assets acquired	303.0
Purchase price	$	303.0

_______________

(1)Tenant-related intangible assets and network location intangible assets are amortized on a straight-line basis over the estimated useful lives of the assets.

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 September 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 over the estimated useful lives of the assets.

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 September 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)		(154.8)
Deferred tax liability	—		—
Other non-current liabilities	(323.1)		(340.6)
Net assets acquired	7,456.0		$	7,515.1
Goodwill	2,943.3		2,884.2
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 over a 10 year period. Other intangible assets are amortized on a straight-line basis over the estimated useful lives of the assets.

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 September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Pro forma revenues	$	2,671.9	$	2,638.7	$	8,011.7	$	7,749.4
Pro forma net income attributable to American Tower Corporation common stockholders	$	839.4	$	574.6	$	2,449.2	$	1,708.9
Pro forma net income per common share amounts:
Basic net income attributable to American Tower Corporation common stockholders	$	1.80	$	1.24	$	5.26	$	3.68
Diluted net income attributable to American Tower Corporation common stockholders	$	1.80	$	1.23	$	5.25	$	3.67

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BUSINESS SEGMENTS (Tables)

9 Months Ended

Sep. 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 nine months ended September 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  Property		Services		Other		Total
Three Months Ended September 30, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	1,259.2	$	249.2	$	303.4	$	184.0	$	420.4	$	193.7	$	2,609.9	$	61.6			$	2,671.5
Segment operating expenses	219.0		171.8		119.8		83.0		131.5		83.7		808.8		27.7				836.5
Segment gross margin	1,040.2		77.4		183.6		101.0		288.9		110.0		1,801.1		33.9				1,835.0
Segment selling, general, administrative and development expense (1)	48.0		10.9		19.4		12.4		26.7		15.8		133.2		5.5				138.7
Segment operating profit	$	992.2	$	66.5	$	164.2	$	88.6	$	262.2	$	94.2	$	1,667.9	$	28.4			$	1,696.3
Stock-based compensation expense																	$	39.2	39.2
Other selling, general, administrative and development expense																	53.3		53.3
Depreciation, amortization and accretion																	898.1		898.1
Other income (2)																	(150.1)		(150.1)
Income from continuing operations before income taxes																			$	855.8
Total assets	$	26,749.3	$	4,799.6	$	4,592.6	$	10,513.7	$	8,477.7	$	10,750.8	$	65,883.7	$	96.9	$	532.2	$	66,512.8

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $39.2 million.

(2)Primarily includes gains from foreign currency exchange rate fluctuations, partially offset by interest expense.

	Property												Total  Property		Services		Other		Total
Three Months Ended September 30, 2021	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	1,228.5	$	313.5	$	257.4	$	175.8	$	391.0	$	2.7	$	2,368.9	$	85.4			$	2,454.3
Segment operating expenses	220.2		187.1		88.2		73.0		123.7		1.2		693.4		30.9				724.3
Segment gross margin	1,008.3		126.4		169.2		102.8		267.3		1.5		1,675.5		54.5				1,730.0
Segment selling, general, administrative and development expense (1)	47.0		21.5		16.5		12.8		26.3		1.1		125.2		3.8				129.0
Segment operating profit	$	961.3	$	104.9	$	152.7	$	90.0	$	241.0	$	0.4	$	1,550.3	$	50.7			$	1,601.0
Stock-based compensation expense																	$	28.1	28.1
Other selling, general, administrative and development expense																	48.8		48.8
Depreciation, amortization and accretion																	611.4		611.4
Other expense (2)																	135.1		135.1
Income from continuing operations before income taxes																			$	777.6
Total assets	$	27,281.2	$	5,164.2	$	4,965.4	$	12,123.2	$	8,764.1	$	93.8	$	58,391.9	$	100.9	$	2,037.2	$	60,530.0

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $28.1 million.

(2)Primarily includes interest expense, partially offset by gains from foreign currency exchange rate fluctuations.

	Property												Total  Property		Services		Other		Total
Nine Months Ended September 30, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	3,727.5	$	845.7	$	856.7	$	561.3	$	1,264.9	$	569.1	$	7,825.2	$	180.9			$	8,006.1
Segment operating expenses	631.4		528.6		329.4		250.6		395.0		239.3		2,374.3		84.5				2,458.8
Segment gross margin	3,096.1		317.1		527.3		310.7		869.9		329.8		5,450.9		96.4				5,547.3
Segment selling, general, administrative and development expense (1)	134.3		64.9		63.9		41.4		81.4		47.7		433.6		16.6				450.2
Segment operating profit	$	2,961.8	$	252.2	$	463.4	$	269.3	$	788.5	$	282.1	$	5,017.3	$	79.8			$	5,097.1
Stock-based compensation expense																	$	138.1	138.1
Other selling, general, administrative and development expense																	159.7		159.7
Depreciation, amortization and accretion																	2,540.4		2,540.4
Other income (2)																	(220.4)		(220.4)
Income from continuing operations before income taxes																			$	2,479.3

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $138.1 million.

(2)Primarily includes gains from foreign currency exchange rate fluctuations, partially offset by interest expense.

	Property												Total  Property		Services		Other		Total
Nine Months Ended September 30, 2021	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	3,688.2	$	893.1	$	741.1	$	308.2	$	1,093.3	$	7.7	$	6,731.6	$	180.1			$	6,911.7
Segment operating expenses	628.0		546.4		254.8		110.7		337.0		3.1		1,880.0		66.5				1,946.5
Segment gross margin	3,060.2		346.7		486.3		197.5		756.3		4.6		4,851.6		113.6				4,965.2
Segment selling, general, administrative and development expense (1)	126.4		52.7		52.9		26.3		79.6		3.4		341.3		12.1				353.4
Segment operating profit	$	2,933.8	$	294.0	$	433.4	$	171.2	$	676.7	$	1.2	$	4,510.3	$	101.5			$	4,611.8
Stock-based compensation expense																	$	98.0	98.0
Other selling, general, administrative and development expense																	144.3		144.3
Depreciation, amortization and accretion																	1,688.7		1,688.7
Other expense (2)																	379.9		379.9
Income from continuing operations before income taxes																			$	2,300.9

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $98.0 million.

(2)Primarily includes interest expense, partially offset by gains from foreign currency exchange rate fluctuations.

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) reportableSegment	Sep. 30, 2022 USD ($)	Sep. 30, 2022 USD ($) segment	Sep. 30, 2021 USD ($)
Concentration Risk [Line Items]
Number of reportable segments			7		5
Straight-line revenue	$ 127.7	$ 99.6		$ 350.4		$ 324.3
Indian Customer
Concentration Risk [Line Items]
Deferred recognition of revenue	$ 48.0		$ 48.0	$ 48.0	$ 48.0
ATC Europe
Concentration Risk [Line Items]
Ownership percentage	52.00%		52.00%	52.00%	52.00%
Joint Venture - Bangladesh Operations
Concentration Risk [Line Items]
Ownership percentage	51.00%		51.00%	51.00%	51.00%
Germany | ATC Europe
Concentration Risk [Line Items]
Ownership percentage	87.00%		87.00%	87.00%	87.00%
Spain | ATC Europe
Concentration Risk [Line Items]
Ownership percentage	83.00%		83.00%	83.00%	83.00%

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Cash, Cash Equivalents, And Restricted Cash (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 2,121.8	$ 1,949.9	$ 3,277.2
Restricted cash	127.8	393.4	422.1
Total cash, cash equivalents and restricted cash	$ 2,249.6	$ 2,343.3	$ 3,699.3	$ 1,861.4

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Total non-lease revenue	$ 220.6	$ 204.7	$ 646.9	$ 526.2
Property lease revenue	2,450.9	2,249.6	7,359.2	6,385.5
Total revenue	2,671.5	2,454.3	8,006.1	6,911.7
U.S. & Canada
Disaggregation of Revenue [Line Items]
Total non-lease revenue	135.9	158.6	403.2	395.0
Property lease revenue	1,184.9	1,155.3	3,505.2	3,473.3
Total revenue	1,320.8	1,313.9	3,908.4	3,868.3
Asia-Pacific
Disaggregation of Revenue [Line Items]
Total non-lease revenue	4.1	2.6	12.0	6.8
Property lease revenue	245.1	310.9	833.7	886.3
Total revenue	249.2	313.5	845.7	893.1
Africa
Disaggregation of Revenue [Line Items]
Total non-lease revenue	6.5	6.3	20.7	17.5
Property lease revenue	296.9	251.1	836.0	723.6
Total revenue	303.4	257.4	856.7	741.1
Europe
Disaggregation of Revenue [Line Items]
Total non-lease revenue	8.3	2.1	17.5	6.0
Property lease revenue	175.7	173.7	543.8	302.2
Total revenue	184.0	175.8	561.3	308.2
Latin America
Disaggregation of Revenue [Line Items]
Total non-lease revenue	39.0	35.1	114.9	100.9
Property lease revenue	381.4	355.9	1,150.0	992.4
Total revenue	420.4	391.0	1,264.9	1,093.3
Data Centers
Disaggregation of Revenue [Line Items]
Total non-lease revenue	26.8	0.0	78.6	0.0
Property lease revenue	166.9	2.7	490.5	7.7
Total revenue	193.7	2.7	569.1	7.7
Non-lease property revenue
Disaggregation of Revenue [Line Items]
Total non-lease revenue	159.0	119.3	466.0	346.1
Non-lease property revenue | U.S. & Canada
Disaggregation of Revenue [Line Items]
Total non-lease revenue	74.3	73.2	222.3	214.9
Non-lease property revenue | Asia-Pacific
Disaggregation of Revenue [Line Items]
Total non-lease revenue	4.1	2.6	12.0	6.8
Non-lease property revenue | Africa
Disaggregation of Revenue [Line Items]
Total non-lease revenue	6.5	6.3	20.7	17.5
Non-lease property revenue | Europe
Disaggregation of Revenue [Line Items]
Total non-lease revenue	8.3	2.1	17.5	6.0
Non-lease property revenue | Latin America
Disaggregation of Revenue [Line Items]
Total non-lease revenue	39.0	35.1	114.9	100.9
Non-lease property revenue | Data Centers
Disaggregation of Revenue [Line Items]
Total non-lease revenue	26.8	0.0	78.6	0.0
Services revenue
Disaggregation of Revenue [Line Items]
Total non-lease revenue	61.6	85.4	180.9	180.1
Services revenue | U.S. & Canada
Disaggregation of Revenue [Line Items]
Total non-lease revenue	61.6	85.4	180.9	180.1
Services revenue | Asia-Pacific
Disaggregation of Revenue [Line Items]
Total non-lease revenue	0.0	0.0	0.0	0.0
Services revenue | Africa
Disaggregation of Revenue [Line Items]
Total non-lease revenue	0.0	0.0	0.0	0.0
Services revenue | Europe
Disaggregation of Revenue [Line Items]
Total non-lease revenue	0.0	0.0	0.0	0.0
Services revenue | Latin America
Disaggregation of Revenue [Line Items]
Total non-lease revenue	0.0	0.0	0.0	0.0
Services revenue | Data Centers
Disaggregation of Revenue [Line Items]
Total non-lease revenue	$ 0.0	$ 0.0	$ 0.0	$ 0.0

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PREPAID AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid assets	$ 129.4	$ 94.5
Prepaid income tax	157.5	128.6
Unbilled receivables	304.4	269.6
Value added tax and other consumption tax receivables	92.2	83.9
Other miscellaneous current assets	103.5	80.6
Prepaid and other current assets	$ 787.0	$ 657.2

XML

LEASES - Future Minimum Rental Receipts Expected Under Operating Leases (Details) $ in Millions	Sep. 30, 2022 USD ($)
Leases [Abstract]
Remainder of 2022	$ 1,675.7
2023	7,397.6
2024	7,121.1
2025	6,715.1
2026	6,284.5
Thereafter	33,155.8
Total	$ 62,349.8

XML

LEASES - Information About Other Lease-related Balances (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Operating leases:
Right-of-use asset	$ 8,857.5	$ 9,225.1
Current portion of lease liability	766.3	712.6
Lease liability	7,566.4	8,041.8
Total lease liability	$ 8,332.7	$ 8,754.4

XML

LEASES - Schedule of Weighted Average Lease Terms and Discount Rates (Details)	Sep. 30, 2022	Dec. 31, 2021
Operating leases:
Weighted-average remaining lease term (years)	12 years 3 months 18 days	13 years
Weighted-average incremental borrowing rate	5.20%	5.10%

XML

LEASES - Lease Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Leases [Abstract]
Operating lease cost	$ 309.1	$ 295.6	$ 919.8	$ 815.3
Variable lease costs not included in lease liability	$ 92.3	$ 94.3	$ 290.0	$ 248.7

XML

LEASES - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ (916.0)	$ (798.2)
Non-cash items:
New operating leases	289.9	1,607.2
Operating lease modifications and reassessments	$ 114.2	165.3
Telxius Telecom S.A.
Non-cash items:
New operating leases		$ 1,400.0

XML

LEASES - Maturities of Operating Leases (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Leases [Abstract]
Remainder of 2022	$ 288.8
2023	1,085.7
2024	1,031.2
2025	971.3
2026	914.8
Thereafter	6,980.9
Total lease payments	11,272.7
Less amounts representing interest	(2,940.0)
Total lease liability	8,332.7	$ 8,754.4
Less current portion of lease liability	766.3	712.6
Non-current lease liability	$ 7,566.4	$ 8,041.8

XML

GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in the Carrying Value of Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 13,350.1
Adjustments	(43.1)
Other	(7.4)
Effect of foreign currency translation	(613.4)
Goodwill, ending balance	12,686.2
U.S. & Canada
Goodwill [Roll Forward]
Goodwill, beginning balance	4,648.4
Adjustments	0.0
Other	(7.4)
Effect of foreign currency translation	(4.3)
Goodwill, ending balance	4,636.7
Asia-Pacific
Goodwill [Roll Forward]
Goodwill, beginning balance	990.1
Adjustments	0.0
Other	0.0
Effect of foreign currency translation	(85.9)
Goodwill, ending balance	904.2
Africa
Goodwill [Roll Forward]
Goodwill, beginning balance	612.2
Adjustments	0.0
Other	0.0
Effect of foreign currency translation	(78.2)
Goodwill, ending balance	534.0
Europe
Goodwill [Roll Forward]
Goodwill, beginning balance	3,230.4
Adjustments	11.7
Other	0.0
Effect of foreign currency translation	(448.5)
Goodwill, ending balance	2,793.6
Latin America
Goodwill [Roll Forward]
Goodwill, beginning balance	888.6
Adjustments	4.3
Other	0.0
Effect of foreign currency translation	3.5
Goodwill, ending balance	896.4
Data Centers
Goodwill [Roll Forward]
Goodwill, beginning balance	2,978.4
Adjustments	(59.1)
Other	0.0
Effect of foreign currency translation	0.0
Goodwill, ending balance	2,919.3
Services
Goodwill [Roll Forward]
Goodwill, beginning balance	2.0
Adjustments	0.0
Other	0.0
Effect of foreign currency translation	0.0
Goodwill, ending balance	$ 2.0

XML

GOODWILL AND OTHER INTANGIBLE ASSETS - Other Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 26,841.2	$ 28,133.0
Accumulated Amortization	(8,520.9)	(7,405.8)
Net Book Value	18,320.3	20,727.2
Acquired network location intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	6,045.8	6,294.6
Accumulated Amortization	(2,483.0)	(2,305.1)
Net Book Value	$ 3,562.8	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	$ 19,004.1	20,030.5
Accumulated Amortization	(5,676.0)	(5,051.5)
Net Book Value	$ 13,328.1	14,979.0
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	$ 1,791.3	1,807.9
Accumulated Amortization	(361.9)	(49.2)
Net Book Value	$ 1,429.4	$ 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

XML

GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 378.4	$ 318.0	$ 1,300.0	$ 846.2
Weighted Average
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, remaining amortization period			15 years

XML

GOODWILL AND OTHER INTANGIBLE ASSETS - Expected Future Amortization Expenses (Details) $ in Millions	Sep. 30, 2022 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2022	$ 388.9
2023	1,434.8
2024	1,346.2
2025	1,293.4
2026	1,240.5
2027	$ 1,227.4

XML

ACCRUED EXPENSES (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Accrued Liabilities, Current [Abstract]
Accrued construction costs	$ 129.9	$ 197.3
Accrued income tax payable	15.3	84.8
Accrued pass-through costs	83.4	91.0
Amounts payable for acquisitions	16.7	95.2
Amounts payable to tenants	86.0	81.1
Accrued property and real estate taxes	284.3	255.3
Accrued rent	77.7	78.8
Payroll and related withholdings	126.7	124.7
Other accrued expenses	382.7	404.6
Total accrued expenses	$ 1,202.7	$ 1,412.8

XML

LONG-TERM OBLIGATIONS - Schedule of Long-Term Debt Obligations (Details) € in Millions, $ in Millions	Sep. 30, 2022 USD ($)	Sep. 30, 2022 EUR (€)	Apr. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Finance lease obligations	$ 28.4			$ 31.6
Total	38,329.1			43,254.2
Less current portion of long-term obligations	(3,015.2)			(4,568.7)
Long-term obligations	35,313.9			38,685.5
American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	35,963.4			39,943.3
American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	2,337.3			3,279.3
CoreSite Realty Corporation | American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	0.0			955.1
2021 Multicurrency Credit Facility | Revolving Credit Facility | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	4,394.3			4,388.4
2021 Term Loan | Unsecured debt | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	996.0			995.4
2021 Credit Facility | Revolving Credit Facility | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	705.0			1,410.0
2021 EUR Three Year Delayed Draw Term Loan | Unsecured debt | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	808.3	€ 825.0		937.6
2021 USD 364-Day Delayed Draw Term Loan | Unsecured debt | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	0.0			2,998.5
2021 USD Two Year Delayed Draw Term Loan | Unsecured debt | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	$ 1,499.1			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	$ 0.0			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	$ 999.3			997.9
3.000% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.00%	3.00%
Long-term debt	$ 692.7			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	$ 498.7			497.9
5.00% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	5.00%	5.00%
Long-term debt	$ 1,000.6			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	$ 648.0			647.0
2.950% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.95%	2.95%
Long-term debt	$ 646.0			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	$ 747.0			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	$ 486.9			563.8
4.000% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	4.00%	4.00%
Long-term debt	$ 746.5			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	$ 497.1			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	$ 498.0			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	$ 696.0			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	$ 486.9			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	$ 594.1			593.0
3.375% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.375%	3.375%
Long-term debt	$ 992.5			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	$ 398.5			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	$ 745.9			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	$ 730.1			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	$ 484.8			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	$ 642.9		$ 650.0	0.0
3.55% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.55%	3.55%
Long-term debt	$ 746.1			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	$ 694.9			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	$ 728.5			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	$ 646.3			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	$ 592.3			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	$ 729.9			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	$ 1,636.4			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	$ 743.2			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	$ 741.9			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	$ 483.1			561.0
1.875% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.875%	1.875%
Long-term debt	$ 792.1			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	$ 694.2			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	$ 691.6			691.0
1.000% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.00%	1.00%
Long-term debt	$ 630.2			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	$ 642.0		$ 650.0	0.0
1.250% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.25%	1.25%
Long-term debt	$ 483.1			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	$ 1,038.2			1,038.0
2.950% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.95%	2.95%
Long-term debt	$ 1,022.0			1,021.5
Series 2013-2A securities | Secured debt | American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	1,299.3			1,298.2
Series 2018-1A securities | Secured debt | American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	495.9			495.3
Series 2015-2 notes | Secured debt | American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	523.2			522.7
Other subsidiary debt | Unsecured debt | American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	$ 18.9			$ 8.0

XML

LONG-TERM OBLIGATIONS - Current Portion of Long-Term Obligations (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Current portion of long-term obligations	$ 3,015.2	$ 4,568.7
American Tower subsidiary | Secured debt | Series 2013-2A securities
Debt Instrument [Line Items]
Current portion of long-term obligations	1,300.0
American Tower Corporation | Senior notes | 3.50% senior notes
Debt Instrument [Line Items]
Current portion of long-term obligations	$ 1,000.0
Debt interest rate	3.50%
American Tower Corporation | Senior notes | 3.000% senior notes
Debt Instrument [Line Items]
Current portion of long-term obligations	$ 700.0
Debt interest rate	3.00%

XML

LONG-TERM OBLIGATIONS - Repayment of Debt (Details) - USD ($) $ in Millions	Sep. 30, 2022	Jan. 14, 2022	Jan. 07, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Accrued and unpaid interest	$ 199.5			$ 254.7
American Tower Corporation | Senior notes | 2.250% senior notes
Debt Instrument [Line Items]
Redemption price		$ 600.0
Debt 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

XML

LONG-TERM OBLIGATIONS - Offering of Senior Notes (Details) - USD ($) $ in Millions		9 Months Ended
	Apr. 01, 2022	Sep. 30, 2022	Sep. 30, 2021
Debt Instrument [Line Items]
Proceeds from term loans		$ 0.0	$ 2,347.0
Senior notes
Debt Instrument [Line Items]
Redemption price percentage	100.00%	101.00%
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]
Debt interest rate		3.65%
Debt face amount	650.0
American Tower Corporation | Senior notes | 4.050% senior notes
Debt Instrument [Line Items]
Debt interest rate		4.05%
Debt face amount	$ 650.0

XML

LONG-TERM OBLIGATIONS - Schedule of Key Terms of Notes (Details) - USD ($) $ in Millions		9 Months Ended
	Apr. 01, 2022	Sep. 30, 2022	Dec. 31, 2021
Senior notes
Debt Instrument [Line Items]
Redemption price percentage	100.00%	101.00%
American Tower Corporation
Debt Instrument [Line Items]
Long-term debt		$ 35,963.4	$ 39,943.3
American Tower Corporation | Senior notes | 3.650% senior notes
Debt Instrument [Line Items]
Long-term debt	$ 650.0	$ 642.9	0.0
Contractual Interest Rate		3.65%
American Tower Corporation | Senior notes | 4.050% senior notes
Debt Instrument [Line Items]
Long-term debt	$ 650.0	$ 642.0	$ 0.0
Contractual Interest Rate		4.05%

XML

LONG-TERM OBLIGATIONS - Bank Facilities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Jun. 10, 2022	Apr. 06, 2022	Apr. 01, 2022	Jan. 14, 2022	Dec. 31, 2021
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	$ 6,000.0
Revolving Credit Facility | 2021 Credit Facility
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity	4,000.0
American Tower Corporation
Line of Credit Facility [Line Items]
Long-term debt	$ 35,963.4					$ 39,943.3
American Tower Corporation | 2.250% senior notes | Senior notes
Line of Credit Facility [Line Items]
Debt interest rate	2.25%
Redemption price					$ 600.0
Long-term debt	$ 0.0					600.3
American Tower Corporation | 2021 USD 364-Day Delayed Draw Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Redemption price		$ 2,300.0	$ 100.0
Long-term debt	$ 0.0					2,998.5
American Tower Corporation | 3.650% senior notes | Senior notes
Line of Credit Facility [Line Items]
Debt interest rate	3.65%
Long-term debt	$ 642.9			$ 650.0		0.0
American Tower Corporation | 4.050% senior notes | Senior notes
Line of Credit Facility [Line Items]
Debt interest rate	4.05%
Long-term debt	$ 642.0			$ 650.0		0.0
American Tower Corporation | Revolving Credit Facility | 2021 Multicurrency Credit Facility
Line of Credit Facility [Line Items]
Borrowings under credit facilities	850.0
Repayment of indebtedness under credit facility	680.0
Long-term debt	4,394.3					4,388.4
American Tower Corporation | Revolving Credit Facility | 2021 Credit Facility
Line of Credit Facility [Line Items]
Borrowings under credit facilities	2,700.0
Repayment of indebtedness under credit facility	3,400.0
Long-term debt	$ 705.0					$ 1,410.0

XML

LONG-TERM OBLIGATIONS - Schedule of Credit Facilities and Term Loans (Details) € in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($) renewalPeriod	Sep. 30, 2022 EUR (€)	Dec. 31, 2021 USD ($)
2021 EUR Three Year Delayed Draw Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Debt instrument term	3 years
2021 USD 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	$ 35,963.4		$ 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	$ 4,394.3		4,388.4
Outstanding principal balance	4,394.3
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	$ 705.0		1,410.0
Outstanding principal balance	705.0
Undrawn letters of credit	$ 24.7
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	$ 996.0		995.4
Outstanding principal balance	$ 1,000.0
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	$ 808.3	€ 825.0	937.6
Outstanding principal balance	$ 808.7
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 Two Year Delayed Draw Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Long-term debt	$ 1,499.1		$ 1,498.4
Outstanding principal balance	$ 1,500.0
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%

XML

LONG-TERM OBLIGATIONS - Nigeria Letters of Credit (Details) - Nigeria $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Line of Credit Facility [Line Items]
Letters of credit outstanding amount	$ 13.0
Letter of Credit
Line of Credit Facility [Line Items]
Debt instrument term	270 days

XML

FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Dec. 31, 2021
Liabilities:
Unrealized gains (losses) for equity securities	$ 4.4	$ (3.4)
Fair Value, Measurements, Recurring | Level 1
Assets:
Investments in equity securities	33.7	33.7	$ 37.1
Fair Value, Measurements, Recurring | Level 1 | Interest Rate Swap
Assets:
Interest rate swap agreements	0.0	0.0	0.0
Liabilities:
Interest rate swap agreements	0.0	0.0	0.0
Fair value of debt related to interest rate swap agreements	(6.4)	(6.4)	12.2
Fair Value, Measurements, Recurring | Level 2
Assets:
Investments in equity securities	0.0	0.0	0.0
Fair Value, Measurements, Recurring | Level 2 | Interest Rate Swap
Assets:
Interest rate swap agreements	0.0	0.0	11.0
Liabilities:
Interest rate swap agreements	7.6	7.6	0.0
Fair value of debt related to interest rate swap agreements	0.0	0.0	0.0
Fair Value, Measurements, Recurring | Level 3
Assets:
Investments in equity securities	0.0	0.0	0.0
Fair Value, Measurements, Recurring | Level 3 | Interest Rate Swap
Assets:
Interest rate swap agreements	0.0	0.0	0.0
Liabilities:
Interest rate swap agreements	0.0	0.0	0.0
Fair value of debt related to interest rate swap agreements	$ 0.0	$ 0.0	$ 0.0

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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term obligations	$ 38,329,100,000		$ 38,329,100,000		$ 43,254,200,000
Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset impairments	0	$ 0	0	$ 0
Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	34,300,000,000		34,300,000,000		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	23,600,000,000		23,600,000,000		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	$ 10,700,000,000		$ 10,700,000,000		$ 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]
Debt interest rate	2.25%		2.25%
Interest rate swap agreements	$ 0		$ 0

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INCOME TAXES - Narrative (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Income Tax Contingency [Line Items]
Reversal of valuation allowances		$ 79,700,000	$ 8,800,000
Unrecognized tax benefits that would impact the ETR	$ 99,700,000	99,700,000		$ 94,800,000
Unrecognized tax benefits, increase resulting from current period tax positions	2,200,000	11,800,000
Increase from remeasurement of acquired liabilities		3,500,000
Unrecognized tax benefits, decrease due to foreign currency translation	3,900,000	6,300,000
Unrecognized tax benefits, decrease from settlements	1,600,000	1,600,000
Unrecognized tax benefits, income tax penalties and interest accrued	52,800,000	52,800,000		$ 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	$ 23,300,000	$ 23,300,000

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INCOME TAXES - Schedule of Penalties and Income Tax Related Expenses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Penalties and income tax-related interest expense	$ 3.7	$ 9.6	$ 15.2	$ 43.1
Increase to penalties and income tax-related interest expense due to reclassifications				$ 16.6

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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Discount from market price (in percent)			15.00%
Unrecognized compensation expense	$ 0		$ 0
Stock-based compensation expense	39,200,000	$ 28,100,000	$ 138,100,000	$ 98,000,000.0
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
Number of shares forfeited (in shares)			61,586
RSUs | CoreSite Realty Corporation
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	9,800,000		$ 9,800,000
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	8,600,000		$ 8,600,000
Expected weighted average recognition period			2 years
Units granted (in shares)			98,542
Number of shares forfeited (in shares)			0			40,186
Stock-based compensation expense	$ 8,300,000		$ 26,600,000
Performance Shares | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of potential target shares			0.00%
Performance Shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of potential target shares			200.00%
2007 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issuable under stock incentive plan (in shares)	5,200,000		5,200,000
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	$ 199,700,000		$ 199,700,000
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

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STOCK-BASED COMPENSATION - Summary of Stock-based Compensation Expenses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Share-Based Payment Arrangement [Abstract]
Stock-based compensation expense	$ 39.2	$ 28.1	$ 138.1	$ 98.0

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STOCK-BASED COMPENSATION - Summary of the Company's Option Activity (Details)	9 Months Ended
	Sep. 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)	(157,168)
Options forfeited (in shares)	0
Options expired (in shares)	0
Options outstanding at end of period (in shares)	910,831

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STOCK-BASED COMPENSATION - Summary of Restricted Stock Activity (Details) - shares	9 Months Ended	12 Months Ended
	Sep. 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)	(537,264)
Units forfeited (in shares)	(61,586)
Units outstanding at end of period (in shares)	1,401,606	1,298,178
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
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
Vesting period	3 years	3 years	3 years
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
Vesting period	3 years
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
Vesting period	3 years
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
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

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EQUITY - Narrative (Details) - USD ($)		1 Months Ended	9 Months Ended
	Jun. 07, 2022	Aug. 31, 2020	Sep. 30, 2022	Sep. 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			$ 21,000,000
Stock offering, value (up to)		$ 1,000,000,000
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01		$ 0.01
Price per share (in dollars per share)	$ 256.00
Accrued dividend RSU			$ 13,500,000
Paid dividend RSU			$ 6,800,000	$ 7,500,000
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

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EQUITY - Distributions Declared (Details) - USD ($) $ / shares in Units, $ in Millions																	9 Months Ended
	Oct. 26, 2022	Sep. 21, 2022	Jul. 08, 2022	May 18, 2022	Apr. 29, 2022	Mar. 10, 2022	Jan. 14, 2022	Dec. 15, 2021	Oct. 15, 2021	Sep. 16, 2021	Jul. 09, 2021	May 27, 2021	Apr. 29, 2021	Mar. 04, 2021	Feb. 02, 2021	Dec. 03, 2020	Sep. 30, 2022	Sep. 30, 2021
Dividends Payable [Line Items]
Aggregate Payment Amount on common stock																	$ 1,945.9	$ 1,674.4
Common Stock
Dividends Payable [Line Items]
Distribution per share, common stock (in dollars per share)		$ 1.47								$ 1.31
Aggregate Payment Amount on common stock									$ 596.6
Common Stock | Subsequent Event
Dividends Payable [Line Items]
Aggregate Payment Amount on common stock	$ 684.4
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			$ 665.8		$ 638.8		$ 633.5				$ 577.8		$ 551.5		$ 537.6

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NONCONTROLLING INTERESTS - Narrative (Details) € in Millions, ৳ in Millions, $ in Millions	1 Months Ended											2 Months Ended	3 Months Ended	9 Months Ended		48 Months Ended
	Aug. 31, 2022 USD ($)	Aug. 31, 2022 EUR (€)	Dec. 31, 2021 USD ($)	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	Sep. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Aug. 31, 2026
Noncontrolling Interest [Line Items]
Adjustment to noncontrolling interest															$ 0.0
Data Centers | U.S.
Noncontrolling Interest [Line Items]
Stock conversion period	4 years	4 years
Percentage of ownership after transaction													71.00%
Data Centers | U.S. | Common stock
Noncontrolling Interest [Line Items]
Controlling ownership interest percentage													0.77	0.77
Forecast | Data Centers | U.S. | Common stock
Noncontrolling Interest [Line Items]
Percentage of ownership after transaction																64.00%
KTBL Acquisition
Noncontrolling Interest [Line Items]
Percentage of interests acquired							51.00%	51.00%
Purchase price							$ 10.6	৳ 900
Additional Paid-in Capital
Noncontrolling Interest [Line Items]
Adjustment to noncontrolling interest									$ (648.4)						(648.4)
Noncontrolling Interests
Noncontrolling Interest [Line Items]
Adjustment to noncontrolling interest									601.0					$ 0.0	601.0
Accumulated Other Comprehensive Loss
Noncontrolling Interest [Line Items]
Adjustment to noncontrolling interest									47.4						$ 47.4
Subsidiary Interest
Noncontrolling Interest [Line Items]
Payments to acquire noncontrolling interest											$ 6.0
Ownership percentage											100.00%
ATC Europe
Noncontrolling Interest [Line Items]
Payments to acquire noncontrolling interest									$ 214.9	€ 178.0
Ownership percentage													52.00%	52.00%
Ownership percentage by noncontrolling owners									49.00%	49.00%		49.00%
Germany
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners													13.00%	13.00%
Spain
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners													17.00%	17.00%
Stonepeak | Data Centers | U.S.
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners													29.00%	29.00%
Preferred stock, dividend rate (as a percent)														5.00%
Preferred stock, conversion ratio													1	1
Stonepeak | Data Centers | U.S. | Common stock
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners													23.00%	23.00%
Stonepeak | Data Centers | U.S. | Preferred stock
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners													100.00%	100.00%
Stonepeak | Forecast | Data Centers | U.S. | Common stock
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners																36.00%
AT Iberia C.V.
Noncontrolling Interest [Line Items]
Dividends declared			$ 15.9	€ 14.0
ATC Europe | France And Poland
Noncontrolling Interest [Line Items]
Ownership percentage													100.00%	100.00%
ATC Europe | Germany
Noncontrolling Interest [Line Items]
Ownership percentage													87.00%	87.00%
ATC Europe | Spain
Noncontrolling Interest [Line Items]
Ownership percentage													83.00%	83.00%
CDPQ | ATC Europe
Noncontrolling Interest [Line Items]
Ownership interest acquired												30.00%		30.00%
Allianz | ATC Europe
Noncontrolling Interest [Line Items]
Ownership interest acquired												18.00%		18.00%
CDPQ & Allianz | ATC Europe
Noncontrolling Interest [Line Items]
Payments to acquire noncontrolling interest					$ 3,100.0	€ 2,600.0
Confidence Group | KTBL
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners							49.00%	49.00%
Stonepeak | Preferred stock
Noncontrolling Interest [Line Items]
Accrued dividends													$ 5.5	$ 5.5
Stonepeak | Data Centers | U.S.
Noncontrolling Interest [Line Items]
Payments to acquire noncontrolling interest	$ 2,500.0
Stonepeak | Data Centers | U.S. | Common stock
Noncontrolling Interest [Line Items]
Payments to acquire noncontrolling interest	1,750.0
Stonepeak | Data Centers | U.S. | Preferred stock
Noncontrolling Interest [Line Items]
Payments to acquire noncontrolling interest	750.0
AT Rhine C.V.
Noncontrolling Interest [Line Items]
Dividends declared	$ 25.1	€ 25.0

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NONCONTROLLING INTERESTS - Schedule of Changes in Noncontrolling Interest (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at beginning of period		$ 10,726.2	$ 6,823.4	$ 9,069.6	$ 4,568.4
Contributions from noncontrolling interest holders		2,504.2		2,552.6	3,078.2
Purchase of noncontrolling interest					10.2
Adjustment to noncontrolling interest due to reorganization					0.0
Redemption of noncontrolling interest					0.0
Net (loss) income attributable to noncontrolling interests (6)		819.7	724.5	2,413.3	2,121.2
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax		(1,075.9)	(622.3)	(2,117.9)	(823.5)
Distributions to noncontrolling interest holders		(9.0)	(0.1)	(9.3)	(215.3)
Balance at end of period	$ 6,823.4	12,318.6	9,477.0	12,318.6	9,477.0
Preferred stock | Stonepeak
Noncontrolling Interest [Line Items]
Accrued dividends		5.5		5.5
Preferred stock | PGGM
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Distributions to noncontrolling interest holders				(3.2)
Noncontrolling Interests
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at beginning of period		3,767.5	1,069.2	3,988.4	474.9
Contributions from noncontrolling interest holders		2,504.2	3,078.2	2,552.6	3,078.2
Purchase of noncontrolling interest					10.2
Adjustment to noncontrolling interest due to reorganization	601.0			0.0	601.0
Redemption of noncontrolling interest				0.0	(1.7)
Net (loss) income attributable to noncontrolling interests (6)		(20.0)	1.5	(36.3)	6.9
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax		(205.9)	(93.2)	(458.6)	(103.3)
Distributions to noncontrolling interest holders		(9.0)	(0.1)	(9.3)	(0.4)
Balance at end of period	$ 1,069.2	$ 6,036.8	$ 4,065.8	6,036.8	4,065.8
Noncontrolling Interests | ATC Europe Transactions
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Contributions from noncontrolling interest holders				0.0	3,078.2
Noncontrolling Interests | Bangladesh Partnership
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Purchase of noncontrolling interest				0.0	10.2
Noncontrolling Interests | Stonepeak Transaction
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Contributions from noncontrolling interest holders				2,500.0	0.0
Noncontrolling Interests | All Other Entities
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Contributions from noncontrolling interest holders				$ 52.6	$ 0.0

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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		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net income attributable to American Tower Corporation common stockholders	$ 839.7	$ 723.0	$ 2,449.6	$ 2,114.3
Basic weighted average common shares outstanding (in shares)	465,594	455,224	460,141	450,148
Dilutive securities (in shares)	1,207	1,753	1,219	1,833
Diluted weighted average common shares outstanding (in shares)	466,801	456,977	461,360	451,981
Basic net income attributable to American Tower Corporation common stockholders per common share (in dollars per share)	$ 1.80	$ 1.59	$ 5.32	$ 4.70
Diluted net income attributable to American Tower Corporation common stockholders per common share (in dollars per share)	$ 1.80	$ 1.58	$ 5.31	$ 4.68

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EARNINGS PER COMMON SHARE - Schedule Of Shares Excluded From Computation Of Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from dilutive effect (in shares)	0	0	88	0

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COMMITMENTS AND CONTINGENCIES (Details) ₨ in Millions, $ in Millions				9 Months Ended
	Dec. 05, 2016 USD ($)	Dec. 05, 2016 INR (₨)	Mar. 27, 2015 USD ($) communicationsSite renewalPeriod	Sep. 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 | $			$ 5,000.0
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 | $				$ 1,100.0
Successive terms to renew lease | renewalPeriod				5
Lease renewal term				5 years
Operating lease, term of contract				27 years

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ACQUISITIONS - Schedule of Merger and Acquisition Related Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Acquisition and merger related expenses	$ 29.0	$ 25.3	$ 38.2	$ 88.8
Integration costs	$ 14.0	$ 6.9	$ 38.8	$ 32.9

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ACQUISITIONS - Narrative (Details) $ / shares in Units, € in Millions, $ in Millions								1 Months Ended		9 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 ($) communicationSite	Jun. 30, 2021 EUR (€) communicationSite	Sep. 30, 2022 USD ($) communicationSite	Sep. 30, 2022 EUR (€)	Sep. 30, 2021 USD ($)	Oct. 27, 2022 communicationSite	Dec. 31, 2021 communicationSite	Nov. 14, 2021 dataCenter market $ / shares	Dec. 31, 2020 communicationSite
Business Acquisition [Line Items]
Payment received related to acquisition | $										$ 8.5		$ 4.4
Telxius Telecom S.A.
Business Acquisition [Line Items]
Number of sites acquired				31,000	31,000
Purchase price		$ 700.0	€ 600.0	$ 9,400.0	€ 7,700.0
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
Purchase price								$ 7,700.0	€ 6,300.0
Telxius Telecom S.A. | Telxius Latin America Tower Division
Business Acquisition [Line Items]
Number of sites acquired								7,000	7,000
Purchase price								$ 1,100.0	€ 900.0
CoreSite Realty Corporation
Business Acquisition [Line Items]
Number of sites acquired | dataCenter															24
Purchase price | $	$ 10,400.0
Price per share of shares acquired (in dollars per share) | $ / shares															$ 170.00
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										250.5	€ 255.5
Spain Fiber Acquisition
Business Acquisition [Line Items]
Purchase price										128.8	€ 120.1
2022 Other Acquisitions | Communication Sites
Business Acquisition [Line Items]
Purchase price | $										$ 174.2
Number of sites acquired										258
Remaining payable on asset acquisition | $										$ 11.6
Orange S.A. | Communication Sites
Business Acquisition [Line Items]
Number of sites acquired						2,000	2,000			208				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													75
Orange S.A. | Communication Sites | Minimum
Business Acquisition [Line Items]
Purchase price						$ 550.5	€ 500.0
Orange S.A. | Communication Sites | Maximum
Business Acquisition [Line Items]
Purchase price						$ 660.5	€ 600.0

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ACQUISITIONS - Schedule of Allocation of Purchase Price for Asset Acquisitions (Details) - USD ($) $ in Millions			9 Months Ended
	Sep. 30, 2022	Dec. 28, 2021	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Updated Allocation
Goodwill	$ 12,686.2		$ 12,686.2	$ 13,350.1
Telxius Telecom S.A.
Updated Allocation
Current assets	284.1		284.1		$ 289.0
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	3,533.0		3,533.0		3,500.0
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		0.0		$ 0.0
CoreSite Realty Corporation
Updated Allocation
Current assets	99.6	$ 99.8	99.6
Property and equipment	5,289.5	5,129.0	5,289.5
Other non-current assets	330.1	332.9	330.1
Current liabilities	(154.8)	(156.6)	(154.8)
Deferred tax liability	0.0	0.0	0.0
Other non-current liabilities	(340.6)	(323.1)	(340.6)
Net assets acquired	7,515.1	7,456.0	7,515.1
Goodwill	2,884.2	2,943.3	2,884.2
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	655.0	665.0	$ 655.0
Estimated Useful Lives (years)			10 years
CoreSite Realty Corporation | Network location intangible assets
Updated Allocation
Intangibles assets	0.0	0.0	$ 0.0
CoreSite Realty Corporation | Other intangible assets
Updated Allocation
Intangibles assets	1,636.3	$ 1,709.0	1,636.3
Acquisitions 2022
Other
Current assets	33.3		33.3
Property and equipment	113.6		113.6
Other non-current assets	18.7		18.7
Current liabilities	(1.1)		(1.1)
Deferred tax liability	0.0		0.0
Other non-current liabilities	(24.0)		(24.0)
Net assets acquired	303.0		303.0
Fair value of net assets acquired	303.0		303.0
Purchase price			303.0
Acquisitions 2022 | Tenant-related intangible assets
Other
Intangible assets	143.7		143.7
Acquisitions 2022 | Network location intangible assets
Other
Intangible assets	18.8		18.8
Acquisitions 2022 | Other intangible assets
Other
Intangible assets	$ 0.0		$ 0.0

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ACQUISITIONS - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Pro forma revenues	$ 2,671.9	$ 2,638.7	$ 8,011.7	$ 7,749.4
Pro forma net income attributable to American Tower Corporation common stockholders	$ 839.4	$ 574.6	$ 2,449.2	$ 1,708.9
Pro forma net income per common share amounts:
Basic net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 1.80	$ 1.24	$ 5.26	$ 3.68
Diluted net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 1.80	$ 1.23	$ 5.25	$ 3.67

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BUSINESS SEGMENTS - Narrative (Details) - 9 months ended Sep. 30, 2022	reportableSegment	segment
Segment Reporting [Abstract]
Number of reportable segments	7	5

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BUSINESS SEGMENTS - Summarized Segment Financial Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Segment revenues	$ 2,671.5	$ 2,454.3	$ 8,006.1	$ 6,911.7
Segment selling, general, administrative and development expense	231.2	205.9	748.0	595.7
OPERATING INCOME	652.9	827.5	2,160.3	2,505.4
Stock-based compensation expense	39.2	28.1	138.1	98.0
Depreciation, amortization and accretion			2,540.4	1,688.7
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	855.8	777.6	2,479.3	2,300.9
Total assets	66,512.8	60,530.0	66,512.8	60,530.0	$ 69,887.9
Selling, General and Administrative Expenses
Segment Reporting Information [Line Items]
Stock-based compensation expense	39.2	28.1	138.1	98.0
U.S. & Canada
Segment Reporting Information [Line Items]
Segment revenues	1,320.8	1,313.9	3,908.4	3,868.3
Asia-Pacific
Segment Reporting Information [Line Items]
Segment revenues	249.2	313.5	845.7	893.1
Africa
Segment Reporting Information [Line Items]
Segment revenues	303.4	257.4	856.7	741.1
Europe
Segment Reporting Information [Line Items]
Segment revenues	184.0	175.8	561.3	308.2
Latin America
Segment Reporting Information [Line Items]
Segment revenues	420.4	391.0	1,264.9	1,093.3
Data Centers
Segment Reporting Information [Line Items]
Segment revenues	193.7	2.7	569.1	7.7
Operating Segments
Segment Reporting Information [Line Items]
Segment revenues	2,671.5	2,454.3	8,006.1	6,911.7
Segment operating expenses	836.5	724.3	2,458.8	1,946.5
Segment gross margin	1,835.0	1,730.0	5,547.3	4,965.2
Segment selling, general, administrative and development expense	138.7	129.0	450.2	353.4
OPERATING INCOME	1,696.3	1,601.0	5,097.1	4,611.8
Operating Segments | Property
Segment Reporting Information [Line Items]
Segment revenues	2,609.9	2,368.9	7,825.2	6,731.6
Segment operating expenses	808.8	693.4	2,374.3	1,880.0
Segment gross margin	1,801.1	1,675.5	5,450.9	4,851.6
Segment selling, general, administrative and development expense	133.2	125.2	433.6	341.3
OPERATING INCOME	1,667.9	1,550.3	5,017.3	4,510.3
Total assets	65,883.7	58,391.9	65,883.7	58,391.9
Operating Segments | U.S. & Canada
Segment Reporting Information [Line Items]
Segment revenues	1,259.2	1,228.5	3,727.5	3,688.2
Segment operating expenses	219.0	220.2	631.4	628.0
Segment gross margin	1,040.2	1,008.3	3,096.1	3,060.2
Segment selling, general, administrative and development expense	48.0	47.0	134.3	126.4
OPERATING INCOME	992.2	961.3	2,961.8	2,933.8
Total assets	26,749.3	27,281.2	26,749.3	27,281.2
Operating Segments | Asia-Pacific
Segment Reporting Information [Line Items]
Segment revenues	249.2	313.5	845.7	893.1
Segment operating expenses	171.8	187.1	528.6	546.4
Segment gross margin	77.4	126.4	317.1	346.7
Segment selling, general, administrative and development expense	10.9	21.5	64.9	52.7
OPERATING INCOME	66.5	104.9	252.2	294.0
Total assets	4,799.6	5,164.2	4,799.6	5,164.2
Operating Segments | Africa
Segment Reporting Information [Line Items]
Segment revenues	303.4	257.4	856.7	741.1
Segment operating expenses	119.8	88.2	329.4	254.8
Segment gross margin	183.6	169.2	527.3	486.3
Segment selling, general, administrative and development expense	19.4	16.5	63.9	52.9
OPERATING INCOME	164.2	152.7	463.4	433.4
Total assets	4,592.6	4,965.4	4,592.6	4,965.4
Operating Segments | Europe
Segment Reporting Information [Line Items]
Segment revenues	184.0	175.8	561.3	308.2
Segment operating expenses	83.0	73.0	250.6	110.7
Segment gross margin	101.0	102.8	310.7	197.5
Segment selling, general, administrative and development expense	12.4	12.8	41.4	26.3
OPERATING INCOME	88.6	90.0	269.3	171.2
Total assets	10,513.7	12,123.2	10,513.7	12,123.2
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Segment revenues	420.4	391.0	1,264.9	1,093.3
Segment operating expenses	131.5	123.7	395.0	337.0
Segment gross margin	288.9	267.3	869.9	756.3
Segment selling, general, administrative and development expense	26.7	26.3	81.4	79.6
OPERATING INCOME	262.2	241.0	788.5	676.7
Total assets	8,477.7	8,764.1	8,477.7	8,764.1
Operating Segments | Data Centers
Segment Reporting Information [Line Items]
Segment revenues	193.7	2.7	569.1	7.7
Segment operating expenses	83.7	1.2	239.3	3.1
Segment gross margin	110.0	1.5	329.8	4.6
Segment selling, general, administrative and development expense	15.8	1.1	47.7	3.4
OPERATING INCOME	94.2	0.4	282.1	1.2
Total assets	10,750.8	93.8	10,750.8	93.8
Operating Segments | Services
Segment Reporting Information [Line Items]
Segment revenues	61.6	85.4	180.9	180.1
Segment operating expenses	27.7	30.9	84.5	66.5
Segment gross margin	33.9	54.5	96.4	113.6
Segment selling, general, administrative and development expense	5.5	3.8	16.6	12.1
OPERATING INCOME	28.4	50.7	79.8	101.5
Total assets	96.9	100.9	96.9	100.9
Other
Segment Reporting Information [Line Items]
Segment selling, general, administrative and development expense	53.3	48.8	159.7	144.3
Stock-based compensation expense	39.2	28.1	138.1	98.0
Depreciation, amortization and accretion	898.1	611.4	2,540.4	1,688.7
Other income	(150.1)		(220.4)
Other expense		135.1		379.9
Total assets	$ 532.2	$ 2,037.2	$ 532.2	$ 2,037.2

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SUBSEQUENT EVENTS (Details) $ in Millions, $ in Millions				1 Months Ended		3 Months Ended	48 Months Ended
	Oct. 25, 2022 USD ($)	Oct. 25, 2022 NZD ($)	Oct. 20, 2022 USD ($)	Oct. 31, 2022	Aug. 31, 2022 USD ($)	Sep. 30, 2022	Aug. 31, 2026
U.S. | Data Centers
Subsequent Event [Line Items]
Percentage of ownership after transaction						71.00%
Stock conversion period					4 years
U.S. | Data Centers | Common stock | Forecast
Subsequent Event [Line Items]
Percentage of ownership after transaction							64.00%
U.S. | Data Centers | Stonepeak
Subsequent Event [Line Items]
Ownership percentage by noncontrolling owners						29.00%
U.S. | Data Centers | Stonepeak | Common stock
Subsequent Event [Line Items]
Ownership percentage by noncontrolling owners						23.00%
U.S. | Data Centers | Stonepeak | Common stock | Forecast
Subsequent Event [Line Items]
Ownership percentage by noncontrolling owners							36.00%
U.S. | Data Centers | Stonepeak | Preferred stock
Subsequent Event [Line Items]
Ownership percentage by noncontrolling owners						100.00%
U.S. | Data Centers | Stonepeak
Subsequent Event [Line Items]
Payments to acquire noncontrolling interest					$ 2,500.0
U.S. | Data Centers | Stonepeak | Common stock
Subsequent Event [Line Items]
Payments to acquire noncontrolling interest					1,750.0
U.S. | Data Centers | Stonepeak | Preferred stock
Subsequent Event [Line Items]
Payments to acquire noncontrolling interest					$ 750.0
Subsequent Event | U.S. | Data Centers
Subsequent Event [Line Items]
Stock conversion period				4 years
Subsequent Event | U.S. | Data Centers | Common stock
Subsequent Event [Line Items]
Percentage of ownership after transaction				72.00%
Subsequent Event | U.S. | Data Centers | Stonepeak | Common stock
Subsequent Event [Line Items]
Ownership percentage by noncontrolling owners			28.00%
Subsequent Event | U.S. | Data Centers | Stonepeak | Preferred stock
Subsequent Event [Line Items]
Ownership percentage by noncontrolling owners			100.00%
Subsequent Event | U.S. | Data Centers | Stonepeak
Subsequent Event [Line Items]
Payments to acquire noncontrolling interest			$ 570.0
Subsequent Event | New Zealand
Subsequent Event [Line Items]
Payments to acquire land	$ 29.0	$ 50