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Debt and Other Obligations (Textuals) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Debt Instrument [Line Items]                  
Principal amount $ 750 $ 750 $ 1,250            
Max duration of CP 397                
Debt and Lease Obligation $ 24,081 22,921              
Maximum Upward Adjustment - Spread                  
Debt Instrument [Line Items]                  
Debt Instrument, Interest Rate, Stated Percentage 0.05%                
Maximum Downward Adjustment - Spread                  
Debt Instrument [Line Items]                  
Debt Instrument, Interest Rate, Stated Percentage 0.05%                
Maximum Upward Adjustment - Commitment Fee                  
Debt Instrument [Line Items]                  
Debt Instrument, Interest Rate, Stated Percentage 0.01%                
Maximum Downward Adjustment - Commitment Fee [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Interest Rate, Stated Percentage 0.01%                
2018 Tower Revenue Notes 4.241% due 2048 [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount $ 750                
2015 Tower Revenue Notes 3.663% due 2045 [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount 700                
Secured Debt [Member]                  
Debt Instrument [Line Items]                  
Debt and Lease Obligation $ 1,778 1,754              
Secured Debt [Member] | July 2018 Tower Revenue Notes [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount           $ 1,000      
Secured Debt [Member] | 2018 Tower Revenue Notes 3.720% due 2043 [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount           $ 250      
Debt Instrument, Interest Rate, Stated Percentage           3.72%      
Secured Debt [Member] | 2018 Tower Revenue Notes 4.241% due 2048 [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount           $ 750      
Debt Instrument, Interest Rate, Stated Percentage 4.20% [1]         4.241%      
Debt and Lease Obligation [2] $ 747 746              
Secured Debt [Member] | 2018 Tower Revenue Notes Risk Retention Tranche [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount           $ 53      
Secured Debt [Member] | May 2015 Tower Revenue Notes [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount                 $ 1,000
Secured Debt [Member] | 2015 Tower Revenue Notes 3.222% due 2042 [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount                 $ 300
Debt Instrument, Interest Rate, Stated Percentage                 3.222%
Secured Debt [Member] | 2015 Tower Revenue Notes 3.663% due 2045 [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount                 $ 700
Debt Instrument, Interest Rate, Stated Percentage 3.70% [1]               3.663%
Debt and Lease Obligation [2] $ 700 698              
Secured Debt [Member] | Fixed Rate Securitized Debt August 2010 Tower Revenue Notes 6 [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount                 $ 250
Bank Debt [Member] | 2016 Term Loan A [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount               $ 2,000  
Debt Instrument, Interest Rate, Stated Percentage [1],[3] 5.60%                
Debt and Lease Obligation $ 1,117 1,162              
Bank Debt [Member] | 2016 Term Loan A [Member] | Extended Maturity                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount             $ 500    
Bank Debt [Member] | Senior Unsecured 364-Day Revolving Credit Facility [Domain]                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Maximum Borrowing Capacity               1,000  
Bonds [Member] | December 2023 Senior Unsecured 5.600% Notes                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount   $ 750              
Debt Instrument, Interest Rate, Stated Percentage 5.60% [1] 5.60%              
Debt and Lease Obligation $ 742 $ 740              
Bonds [Member] | December 2023 Senior Unsecured 5.800% Notes                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount   $ 750              
Debt Instrument, Interest Rate, Stated Percentage 5.80% [1] 5.80%              
Debt and Lease Obligation $ 742 $ 740              
Bonds [Member] | April 2023 4.800% Senior Notes                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount   $ 600              
Debt Instrument, Interest Rate, Stated Percentage 4.80% [1] 4.80%              
Debt and Lease Obligation $ 595 $ 594              
Bonds [Member] | April 2023 Senior Unsecured 5.100% Notes                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount   $ 750              
Debt Instrument, Interest Rate, Stated Percentage 5.10% [1] 5.10%              
Debt and Lease Obligation $ 743 $ 743              
Bonds [Member] | January 2023 Senior Unsecured 5.000% Notes                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount   $ 1,000              
Debt Instrument, Interest Rate, Stated Percentage 5.00% [1] 5.00%              
Debt and Lease Obligation $ 993 $ 991              
Bonds [Member] | March 2022 Senior Unsecured 2.900% Notes                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount     $ 750            
Debt Instrument, Interest Rate, Stated Percentage     2.90%            
Bonds [Member] | June 2021 Senior Unsecured 2.500% Notes                  
Debt Instrument [Line Items]                  
Debt Instrument, Interest Rate, Stated Percentage       2.50%          
Bonds [Member] | 2016 Senior Unsecured Notes [Domain]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount               1,500  
Bonds [Member] | August 2024 Senior Unsecured 4.900% Notes                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount $ 550                
Debt Instrument, Interest Rate, Stated Percentage [1] 4.90%                
Debt and Lease Obligation $ 544 [4] 0              
Bonds [Member] | August 2024 Senior Unsecured 5.200% Notes                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount $ 700                
Debt Instrument, Interest Rate, Stated Percentage [1] 5.20%                
Debt and Lease Obligation $ 689 [4] 0              
Collateral Pledged [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, PPE Collaterized Amount $ 667                
Commercial Paper [Member]                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Maximum Borrowing Capacity     $ 2,000   $ 1,000        
Debt Instrument, Interest Rate, Stated Percentage [5] 5.00%                
Debt and Lease Obligation $ 1,341 [5] 0              
Revolving Credit Facility [Member]                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Maximum Borrowing Capacity     $ 7,000   $ 5,000 $ 4,250 $ 3,500 $ 2,500  
Debt and Lease Obligation $ 0 [6] $ 670              
[1] Represents the weighted-average stated interest rate, as applicable.
[2] If the Tower Revenue Notes, Series 2015-2 and Series 2018-2 (collectively, "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 governing the terms of such notes) 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 December 31, 2024, the Tower Revenue Notes, Series 2015-2 and 2018-2 have principal amounts of $700 million and $750 million, with anticipated repayment dates in 2025 and 2028, respectively.
[3] Both the 2016 Revolver and senior unsecured term loan A facility ("2016 Term Loan A" and, collectively, "2016 Credit Facility") bear interest, at the Company's option, at either (1) Term SOFR plus (i) a credit spread adjustment of 0.10% per annum and (ii) 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 pays 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 further discussion below regarding potential adjustments to such percentages.
[4] See "Bonds—Senior Notes" below for further discussion of senior unsecured notes issued during 2024.
[5] The maturities of the Commercial Paper Notes, as defined below, when outstanding, may vary but may not exceed 397 days from the date of issue. There were no Commercial Paper Notes issued or outstanding during the period that had original maturities greater than three months.
[6] As of December 31, 2024, the undrawn availability under the senior unsecured revolving credit facility ("2016 Revolver") was $7.0 billion.