Revenues and Contract Costs - Schedule of Receivables from Contracts with Customers (Details) - USD ($) $ in Millions	Mar. 31, 2023	Jan. 01, 2023	Mar. 31, 2022	Jan. 01, 2022
Revenue from Contract with Customer [Abstract]
Receivables	$ 9,969	$ 11,274	$ 10,419	$ 10,758
Device payment plan agreement receivables	$ 16,955	$ 16,648	$ 13,478	$ 12,888