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Wireless Licenses, Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Indefinite-lived Intangible Assets [Line Items]    
Payments for deposits $ 449 $ 598
Wireless Licenses    
Indefinite-lived Intangible Assets [Line Items]    
Wireless licenses under development 13,900 38,900
Interest costs capitalized $ 180 449
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