v3.25.2
Goodwill, Spectrum License Transactions and Other Intangible Assets - Schedule of Other Intangible Assets and Estimated Aggregate Future Amortization Expense (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 7,973 $ 7,633
Accumulated Amortization (5,535) (5,121)
Net Amount 2,438 2,512
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 5,709 5,427
Accumulated Amortization (4,447) (4,123)
Net Amount $ 1,262 1,304
Customer relationships | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, useful life 9 years  
Reacquired rights    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 770 770
Accumulated Amortization (370) (323)
Net Amount $ 400 447
Reacquired rights | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, useful life 9 years  
Tradenames and patents    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 359 338
Accumulated Amortization (170) (157)
Net Amount $ 189 181
Tradenames and patents | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, useful life 19 years  
Favorable spectrum leases    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 578 620
Accumulated Amortization (172) (169)
Net Amount $ 406 451
Favorable spectrum leases | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, useful life 27 years  
Other    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 557 478
Accumulated Amortization (376) (349)
Net Amount $ 181 $ 129
Other | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, useful life 10 years