Device Payment Plan Agreement and Wireless Service Receivables - Schedule of Device Payment Plan Agreement Receivables (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Receivables [Abstract]
Device payment plan agreement receivables, gross	$ 26,521	$ 26,188
Unamortized imputed interest	(579)	(479)
Device payment plan agreement receivables, at amortized cost	25,942	25,709
Allowance	(1,007)	(881)
Device payment plan agreement receivables, net	24,935	24,828
Accounts receivable, net	12,308	12,929
Other assets	$ 12,627	$ 11,899