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Operating Segments and Concentrations of Credit Risk (Tables)

12 Months Ended

Dec. 31, 2021

Dec. 31, 2020

Dec. 31, 2019

Segment Reporting Information [Line Items]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

			Year Ended December 31, 2021
			Towers						Fiber						Other						Consolidated Total
Segment site rental revenues			$	3,804					$	1,915											$	5,719
Segment services and other revenues			601						20												621
Segment revenues			4,405						1,935												6,340
Segment site rental costs of operations			889						633												1,522
Segment services and other costs of operations			414						17												431
Segment costs of operations(a)(b)			1,303						650												1,953
Segment site rental gross margin			2,915						1,282												4,197
Segment services and other gross margin			187						3												190
Segment selling, general and administrative expenses(b)			107						174												281
Segment operating profit (loss)			2,995						1,111												4,106
Other selling, general and administrative expenses(b)															$	290					290
Stock-based compensation expense															131						131
Depreciation, amortization and accretion															1,644						1,644
Interest expense and amortization of deferred financing costs															657						657
Other (income) expenses to reconcile to income (loss) before income taxes(c)															205						205
Income (loss) before income taxes																					$	1,179
Capital expenditures			$	221					$	956					$	52					$	1,229
Total assets (at year end)			$	22,318					$	15,876					$	846					$	39,040
Total goodwill (at year end)			$	5,127					$	4,951					$	—					$	10,078

(a)Exclusive of depreciation, amortization and accretion shown separately.

(b)Segment costs of operations for the year ended December 31, 2021 excludes (1) stock-based compensation expense of $22 million and (2) prepaid lease purchase price adjustments of $18 million. For the year ended December 31, 2021, segment selling, general and administrative expenses exclude stock-based compensation expense of $109 million.

(c)See consolidated statement of operations for further information.

			Year Ended December 31, 2020
			Towers						Fiber						Other						Consolidated Total
Segment site rental revenues			$	3,497					$	1,823											$	5,320
Segment services and other revenues			500						20												520
Segment revenues			3,997						1,843												5,840
Segment site rental costs of operations			866						620												1,486
Segment services and other costs of operations			429						12												441
Segment costs of operations(a)(b)			1,295						632												1,927
Segment site rental gross margin			2,631						1,203												3,834
Segment services and other gross margin			71						8												79
Segment selling, general and administrative expenses(b)			100						186												286
Segment other operating (income) expense(c)			—						(362)												(362)
Segment operating profit (loss)			2,602						1,387												3,989
Other selling, general and administrative expenses(b)															$	283					283
Stock-based compensation expense															133						133
Depreciation, amortization and accretion															1,608						1,608
Interest expense and amortization of deferred financing costs															689						689
Other (income) expenses to reconcile to income (loss) before income taxes(d)															200						200
Income (loss) before income taxes																					$	1,076
Capital expenditures			$	335					$	1,232					$	57					$	1,624
Total assets (at year end)			$	22,242					$	15,746					$	780					$	38,768
Total goodwill (at year end)			$	5,127					$	4,951					$	—					$	10,078

(a)Exclusive of depreciation, amortization and accretion shown separately.

(b)Segment costs of operations for the year ended December 31, 2020 excludes (1) stock-based compensation expense of $24 million and (2) prepaid lease purchase price adjustments of $18 million. For the year ended December 31, 2020, segment selling, general and administrative expenses exclude stock-based compensation expense of $109 million.

(c)See note 15 for further information.

(d)See consolidated statement of operations for further information.

			Year Ended December 31, 2019
			Towers						Fiber						Other						Consolidated Total
Segment site rental revenues			$	3,389					$	1,704											$	5,093
Segment services and other revenues			653						17												670
Segment revenues			4,042						1,721												5,763
Segment site rental costs of operations			864						559												1,423
Segment services and other costs of operations			506						11												517
Segment costs of operations(a)(b)			1,370						570												1,940
Segment site rental gross margin			2,525						1,145												3,670
Segment services and other gross margin			147						6												153
Segment selling, general and administrative expenses(b)			96						195												291
Segment operating profit (loss)			2,576						956												3,532
Other selling, general and administrative expenses(b)															$	233					233
Stock-based compensation expense															116						116
Depreciation, amortization and accretion															1,572						1,572
Interest expense and amortization of deferred financing costs															683						683
Other (income) expenses to reconcile to income (loss) before income taxes(c)															47						47
Income (loss) before income taxes																					$	881
Capital expenditures			$	543					$	1,473					$	41					$	2,057
Total assets (at year end)			$	22,357					$	15,389					$	711					$	38,457
Total goodwill (at year end)			$	5,127					$	4,951					$	—					$	10,078

(a)Exclusive of depreciation, amortization and accretion shown separately.

(b)Segment costs of operations for the year ended December 31, 2019 excludes (1) stock-based compensation expense of $26 million and (2) prepaid lease purchase price adjustments of $20 million. For the year ended December 31, 2019, segment selling, general and administrative expenses exclude stock-based compensation expense of $90 million.

(c)See consolidated statement of operations for further information.

A Summary of the Percentage of the Consolidated Revenues for Those Customers Accounting for More than 10% of the Consolidated Revenues

The following table summarizes the percentage of the consolidated revenues for those tenants accounting for more than 10% of the consolidated revenues.

			Years Ended December 31,
			2021						2020(a)						2019
T-Mobile			35		%				36		%				22		%
AT&T			20		%				22		%				21		%
Verizon Wireless			20		%				19		%				19		%
Sprint			—		%				—		%				14		%
Total			75		%				77		%				76		%

(a)For the year ended December 31, 2020, revenues attributable to T-Mobile include revenues previously derived from Sprint. On April 1, 2020, T-Mobile and Sprint announced the completion of their previously disclosed merger.

X

- Definition

Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer.

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