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Device Payment Plan Agreement and Wireless Service Receivables - Schedule of Device Payment Plan Receivables, Net (Detail) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Receivables [Abstract]    
Device payment plan agreement receivables, gross $ 29,206 $ 26,188
Unamortized imputed interest (758) (479)
Device payment plan agreement receivables, at amortized cost 28,448 25,709
Allowance (1,151) (881)
Device payment plan agreement receivables, net 27,297 24,828
Accounts receivable, net 13,173 12,929
Other assets $ 14,124 $ 11,898