Revenues (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
		Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Revenue Recognition Non-cancelable Lease Term for Wireless Tenants			five to 15 years
Revenue Recognition for Fiber Solutions Tenants			three to 20 years
Revenue, Performance Obligation, Description of Payment Terms			45 to 60 days,
Revenue, Remaining Performance Obligation, Amount		$ 2,200	$ 2,200		$ 2,300	$ 2,600
Revenue Recognized on Deferred Revenues			503	$ 495
Contracted Amounts Receivable from Customers, remainder of year	[1]	1,255	1,255
Contracted Amounts Receivable from Customers, in Two Years	[1]	4,937	4,937
Contracted Amounts Receivable from Customers, in Three Years	[1]	4,586	4,586
Contracted Amounts Receivable from Customers, in Four Years	[1]	4,448	4,448
Contracted Amounts Receivable from Customers, in Five Years	[1]	4,386	4,386
Contracted Amounts Receivable from Customers, Thereafter	[1]	19,781	19,781
Lessor, Operating Lease, Payments to be Received	[1]	39,393	39,393
Accelerated prepaid rent amortization		57	57
Site rental revenue - remaining rental obligation		$ 6	$ 160

[1] Based on the nature of the contract, tenant contracts are accounted for pursuant to relevant lease accounting (ASC 842) or revenue accounting (ASC 606) guidance. Excludes amounts related to services, as those contracts generally have a duration of one year or less.