Device Payment Plan Agreement and Wireless Service Receivables - Schedule of Device Payment Plan Receivables, Net (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Receivables [Abstract]
Device payment plan agreement receivables, gross	$ 26,188	$ 21,303
Unamortized imputed interest	(479)	(358)
Device payment plan agreement receivables, at amortized cost	25,709	20,945
Allowance	(881)	(759)
Device payment plan agreement receivables, net	24,828	20,186
Accounts receivable, net	12,929	12,783
Other assets	$ 11,899	$ 7,403