Condensed Consolidated Balance Sheet - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Assets, Current [Abstract]
Cash and cash equivalents	$ 312	$ 292
Restricted cash, current	165	169
Receivables, net	503	543
Prepaid expenses	119	105
Other current assets	162	145
Assets, Current, Total	1,261	1,254
Deferred site rental receivables	1,682	1,588
Property and equipment, net of accumulated depreciation of $12,220 and $11,937, respectively	15,226	15,269
Operating lease right-of-use assets	6,739	6,682
Goodwill	10,078	10,078
Other intangible assets, net	3,935	4,046
Other assets, net	130	123
Assets, Total	39,051	39,040
Liabilities, Current [Abstract]
Accounts payable	224	246
Accrued interest	117	182
Deferred revenues	721	776
Other accrued liabilities	288	401
Current maturities of debt and other obligations	71	72
Current portion of operating lease liabilities	355	349
Liabilities, Current, Total	1,776	2,026
Debt and other long-term obligations	21,055	20,557
Operating lease liabilities	6,078	6,031
Other long-term liabilities	2,106	2,168
Liabilities, Total	$ 31,015	$ 30,782
Common stock, par value	$ 0.01	$ 0.01
Stockholders' Equity Attributable to Parent [Abstract]
Common Stock, Value, Issued	$ 4	$ 4
Additional Paid in Capital	18,006	18,011
Accumulated Other Comprehensive Income (Loss), Net of Tax	(3)	(4)
Retained Earnings (Accumulated Deficit)	(9,971)	(9,753)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Total	8,036	8,258
Liabilities and Equity, Total	$ 39,051	$ 39,040