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Acquisitions and Divestitures - Spectrum License Transactions (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 28, 2021 | Mar. 31, 2021 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Business Acquisition [Line Items] |  |  |  |  |  |
Payments for intangible assets |  |  |  | $ 5,796 | $ 3,653 | $ 47,596
Spectrum Licenses, C-Band | Spectrum Licenses |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Payments for intangible assets |  | $ 44,600 |  |  |  | 45,500
Estimated clearing and incentive costs | $ 7,600 |  |  |  |  |
Spectrum Licenses, C-Band | Spectrum Licenses | Satellite Agreements |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Payments for intangible assets |  |  |  |  | 310 |
Costs incurred for license agreements acquired |  |  |  |  | 340 |
Spectrum Licenses, C-Band | Spectrum Licenses | Scenario, Forecast |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Estimated clearing and incentive costs |  |  | $ 400 |  |  |
Spectrum Licenses, C-Band | Spectrum Licenses | Projected Clearing Costs |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Payments for intangible assets |  |  |  | $ 4,300 | $ 1,600 | $ 1,300

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