Commitment and Contingencies - Schedule of Timing of Spectrum Lease and Service Credit Commitments (Details) $ in Millions |
Dec. 31, 2025
USD ($)
|
|---|---|
| Commitments and Contingencies Disclosure [Abstract] | |
| Less Than 1 Year | $ 297 |
| 1 - 3 Years | 629 |
| 3 - 5 Years | 645 |
| More Than 5 Years | 3,448 |
| Total | $ 5,019 |