Goodwill, Spectrum License Transactions and Other Intangible Assets - Schedule of Spectrum Licenses (Details) - Licensing Agreements - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Indefinite-lived Intangible Assets [Roll Forward] | |||
| Beginning balance | $ 96,707 | $ 95,798 | $ 92,606 |
| Spectrum license acquisitions | 4,822 | 103 | 3,152 |
| Spectrum licenses transferred to held for sale | (1,024) | (2) | (64) |
| Costs to clear spectrum | 53 | 808 | 104 |
| Ending balance | $ 100,558 | $ 96,707 | $ 95,798 |