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Debt and Other Obligations (Indebtedness) (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Debt and Finance Lease Obligations $ 21,282 $ 20,629
Less: current maturities of debt and other obligations 70 72
Non-current portion of long-term debt and other long-term obligations 21,212 20,557
2015 Tower Revenue Notes 3.663% due 2045 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 700  
2018 Tower Revenue Notes 4.241% due 2048 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 750  
Fixed Rate Securitized Debt July 2018 Tower Revenue Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Increase (Decrease) 5.00%  
Finance Lease Obligations and Other [Member] | Securitized Debt [Member]    
Debt Instrument [Line Items]    
Debt and Finance Lease Obligations [1] $ 235 242
High Yield Bonds [Member] | Senior Unsecured 2016 Notes 4.450% [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 4.50%  
Debt and Finance Lease Obligations $ 896 895
High Yield Bonds [Member] | 4.000% Senior Unsecured Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 4.00%  
Debt and Finance Lease Obligations $ 497 496
High Yield Bonds [Member] | 4.750% Senior Unsecured Notes [Member] [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 4.80%  
Debt and Finance Lease Obligations $ 344 344
High Yield Bonds [Member] | August 2017 Senior Unsecured 3.200% Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 3.20%  
Debt and Finance Lease Obligations $ 747 747
High Yield Bonds [Member] | June 2020 Senior Unsecured 1.350% Notes [Domain]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 1.40%  
Debt and Finance Lease Obligations $ 496 496
High Yield Bonds [Member] | August 2017 Senior Unsecured 3.650% Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 3.70%  
Debt and Finance Lease Obligations $ 995 995
High Yield Bonds [Member] | 3.150% Senior Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 3.20%  
Debt and Finance Lease Obligations $ 748 747
High Yield Bonds [Member] | 3.800% Senior Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 3.80%  
Debt and Finance Lease Obligations $ 993 992
High Yield Bonds [Member] | February 2019 Senior Unsecured 4.300% Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 4.30%  
Debt and Finance Lease Obligations $ 594 593
High Yield Bonds [Member] | February 2019 Senior Unsecured 5.200% Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 5.20%  
Debt and Finance Lease Obligations $ 395 395
High Yield Bonds [Member] | August 2019 Senior Unsecured 3.100% Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 3.10%  
Debt and Finance Lease Obligations $ 545 545
High Yield Bonds [Member] | August 2019 Senior Unsecured 4.000% Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 4.00%  
Debt and Finance Lease Obligations $ 346 345
High Yield Bonds [Member] | April 2020 Senior Unsecured 3.300% Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 3.30%  
Debt and Finance Lease Obligations $ 739 738
High Yield Bonds [Member] | June 2020 Senior Unsecured 2.250% Notes [Domain]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 2.30%  
Debt and Finance Lease Obligations $ 1,090 1,089
High Yield Bonds [Member] | April 2020 Senior Unsecured 4.150% Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 4.20%  
Debt and Finance Lease Obligations $ 490 490
High Yield Bonds [Member] | June 2020 Senior Unsecured 3.250% Notes [Domain]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 3.30%  
Debt and Finance Lease Obligations $ 890 890
High Yield Bonds [Member] | February 2021 Senior Unsecured 2.100% Notes    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 2.10%  
Debt and Finance Lease Obligations $ 988 988
High Yield Bonds [Member] | February 2021 Senior Unsecured 2.900% Notes    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 2.90%  
Debt and Finance Lease Obligations $ 1,233 1,233
High Yield Bonds [Member] | February 2021 Senior Unsecured 1.050% Notes    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 1.10%  
Debt and Finance Lease Obligations $ 991 990
High Yield Bonds [Member] | Senior Unsecured 2016 Notes 3.7% [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 3.70%  
Debt and Finance Lease Obligations $ 747 746
High Yield Bonds [Member] | June 2021 Senior Unsecured 2.500% Notes [Domain]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 2.50%  
Debt and Finance Lease Obligations $ 741 741
High Yield Bonds [Member] | 2.900% Senior Unsecured Notes    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 750  
Debt Instrument, Interest Rate, Stated Percentage 2.90%  
Debt and Finance Lease Obligations $ 741 [3] 0
Unsecured Debt [Member]    
Debt Instrument [Line Items]    
Debt and Finance Lease Obligations 19,555 17,647
Securitized Debt [Member]    
Debt Instrument [Line Items]    
Debt and Finance Lease Obligations $ 1,727 2,982
Securitized Debt [Member] | 2015 Tower Revenue Notes 3.663% due 2045 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 3.70%  
Debt and Finance Lease Obligations [4] $ 697 696
Securitized Debt [Member] | 2018 Tower Revenue Notes 3.720% due 2043 [Member]    
Debt Instrument [Line Items]    
Debt and Finance Lease Obligations $ 0 [5] 249 [4]
Securitized Debt [Member] | 2018 Tower Revenue Notes 4.241% due 2048 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 4.20%  
Debt and Finance Lease Obligations [4] $ 745 744
Securitized Debt [Member] | 3.849% Secured Notes [Member]    
Debt Instrument [Line Items]    
Debt and Finance Lease Obligations $ 0 [5] 998
Securitized Debt [Member] | Fixed Rate Debt 2009 Securitized Notes A-2 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 9.00%  
Debt and Finance Lease Obligations $ 50 53
Bank Debt [Member] | 2016 Term Loan A [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2],[6] 2.70%  
Debt and Finance Lease Obligations $ 1,207 1,222
Bank Debt [Member] | Commercial Paper [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [2] 2.40%  
Bank Debt [Member] | Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage [6] 2.70%  
Commercial Paper [Member]    
Debt Instrument [Line Items]    
Commercial Paper - Outstanding $ 952  
Maximum [Member] | Maximum [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 0.75%  
Maximum [Member] | Finance Lease Obligations and Other [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 10.00%  
Maximum [Member] | Finance Lease Obligations and Other [Member]    
Debt Instrument [Line Items]    
Debt Instrument Maturity Date Range 25 years  
Minimum [Member] | Minimum [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 0.00%  
Minimum [Member] | Finance Lease Obligations and Other [Member]    
Debt Instrument [Line Items]    
Debt Instrument Maturity Date Range one year  
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 1.75%  
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 0.875%  
Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Unused Borrowing Capacity, Amount $ 3,800  
Debt and Finance Lease Obligations [7] $ 1,150 665
Revolving Credit Facility [Member] | Maximum [Member]    
Debt Instrument [Line Items]    
Line of Credit Facility, Commitment Fee Percentage 0.30%  
Revolving Credit Facility [Member] | Minimum [Member]    
Debt Instrument [Line Items]    
Line of Credit Facility, Commitment Fee Percentage 0.08%  
Commercial Paper [Member]    
Debt Instrument [Line Items]    
Debt and Finance Lease Obligations [8] $ 952 $ 265
Commercial Paper - Maximum Available $ 2,000  
Debt Instrument, Maturity Date, Description 397 days  
[1] The Company's finance leases and other obligations relate to land, fiber, vehicles, and other assets and bear interest rates ranging up to 10% and mature in periods ranging from less than one year to approximately 25 years.
[2] See the 2021 Form 10-K, including note 7 to the consolidated financial statements, for additional information regarding the maturity and principal amortization provisions and interest rates relating to the Company's indebtedness.
[3] In March 2022, the Company issued $750 million aggregate principal amount of 2.900% senior unsecured notes due 2027 ("March 2022 Senior Notes"). The Company used the net proceeds from the March 2022 Senior Notes offering to repay a portion of the outstanding indebtedness under its CP Program and pay related fees and expenses.
[4] If the respective series of Tower Revenue Notes are not paid in full on or prior to an applicable anticipated repayment date, then Excess Cash Flow (as defined in the indenture) of the issuers of such notes will be used to repay principal of the applicable series and class of the Tower Revenue Notes, and additional interest (of an additional approximately 5% per annum) will accrue on the respective Tower Revenue Notes. As of June 30, 2022, the Tower Revenue Notes, Series 2015-2 and Series 2018-2 have principal amounts of $700 million and $750 million, with anticipated repayment dates in 2025 and 2028, respectively.
[5] In March 2022, the Company (1) prepaid in full the previously outstanding Tower Revenue Notes, Series 2018-1 and (2) redeemed in full the previously outstanding 3.849% Secured Notes.
[6] Both the 2016 Revolver and 2016 Term Loan A bore interest, at the Company's option, at either (1) LIBOR plus a credit spread ranging from 0.875% to 1.750% per annum or (2) an alternate base rate plus a credit spread ranging from 0.000% to 0.750% per annum, in each case, with the applicable credit spread based on the Company's senior unsecured debt rating. The Company paid a commitment fee ranging from 0.080% to 0.300%, based on the Company's senior unsecured debt rating, per annum on the undrawn available amount under the 2016 Revolver. See the 2021 Form 10-K, including note 7 to the consolidated financial statements, for information regarding potential adjustments to such percentages.
[7] As of June 30, 2022, the undrawn availability under the 2016 Revolver was $3.8 billion.
[8] In March 2022, the Company increased the size of its CP Program to permit the issuance of Commercial Paper Notes in an aggregate principal amount not to exceed $2.0 billion at any time outstanding. Notes under the CP Program may be issued, repaid and re-issued from time to time. The net proceeds of the Commercial Paper Notes are expected to be used for general corporate purposes. The maturities of the Commercial Paper Notes, when outstanding, may vary but may not exceed 397 days from the date of issue. The Commercial Paper Notes are issued under customary terms in the commercial paper market and are issued at a discount from par or, alternatively, can be issued at par and bear varying interest rates on a fixed or floating basis. As of June 30, 2022, the Company had net issuances of $952 million under the CP Program. At any point in time, the Company intends to maintain available commitments under its 2016 Revolver in an amount at least equal to the amount of Commercial Paper Notes outstanding. While any outstanding Commercial Paper Notes generally have short-term maturities, the Company classifies the outstanding issuances, when applicable, as long-term based on its ability and intent to refinance the outstanding issuances on a long-term basis.