Debt and Other Obligations (Scheduled Contractual Maturities) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Contractual Maturities - Year 1	$ 835
Contractual Maturities - Year 2	599
Contractual Maturities - Year 3	2,777
Contractual Maturities - Year 4	3,918
Contractual Maturities - Year 5	2,628
Contractual Maturities - Thereafter	12,335
Total Cash Obligations	23,092
Unamortized Discounts	(171)
Total Debt and Other Obligations Outstanding	$ 22,921
Tower Revenue Notes [Member]
Debt Instrument [Line Items]
Debt, interest rate increase if not paid by anticipated repayment date	5.00%