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Wireless Licenses, Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions | 6 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023
Indefinite-lived Intangible Assets [Line Items] |  |
Payments for deposits | $ 613 | $ 1,085
Wireless Licenses |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Wireless licenses under development | 11,800 | 38,400
Interest costs capitalized | $ 338 | 905
Average remaining renewal period of wireless license portfolio (in years) | 10 years |
Spectrum licenses | Spectrum Licenses, C-Band | Projected Clearing Costs |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Payments for deposits | $ 269 | $ 114

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