Condensed Consolidated Statement of Operations and Comprehensive Income (Loss) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Net revenues:
Site Rental		$ 1,310	$ 1,242
Services and other		111	166
Net Revenues		1,421	1,408
Operating expenses:
Site rental	[1]	375	361
Services and other	[1]	99	124	[2]
Selling, general and administrative		175	152
Asset write-down charges		4	6
Acquisition and integration costs		5	4
Depreciation, amortization and accretion		399	394
Total operating expenses		1,057	1,041
Operating income (loss)		364	367
Nonoperating Income (Expense) [Abstract]
Interest expense and amortization of deferred financing costs		(175)	(168)
Gains (losses) on retirement of long-term obligations		0	(1)
Interest income		1	2
Other income (expense)		0	(1)
Income (loss) before income taxes		190	199
Benefit (provision) for income taxes		(5)	(6)
Net income (loss) attributable to CCIC stockholders		185	193
Dividends/distributions on preferred stock	[3]	(28)	(28)
Net income (loss) attributable to CCIC common stockholders		157	165
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments		(1)	0
Total other comprehensive income (loss)	[4]	(1)
Comprehensive income (loss) attributable to CCIC stockholders		$ 184	$ 193
Net income (loss) attributable to CCIC common stockholders, per common share:
Basic		$ 0.38	$ 0.40
Diluted		$ 0.38	$ 0.40
Weighted-average common shares outstanding (in millions):
Basic		416	415
Diluted		418	417

[1] Exclusive of depreciation, amortization and accretion shown separately.

[2] Exclusive of depreciation, amortization and accretion shown separately.

[3] See note 8 for information regarding common and preferred stock dividends declared per share.

[4] See the condensed consolidated statement of operations and other comprehensive income (loss) for the components of other comprehensive income (loss).