Device Payment Plan Agreement and Wireless Service Receivables - Schedule of Credit Quality Indicators (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Device payment plan agreement receivables, at amortized cost	$ 26,188	$ 21,303
Device payment plan agreement
Financing Receivable, Credit Quality Indicator [Line Items]
2022	19,073
2021	6,448
Prior to 2021	188
Device payment plan agreement receivables, at amortized cost	25,709
New customers | Device payment plan agreement
Financing Receivable, Credit Quality Indicator [Line Items]
2022	2,761
2021	904
Prior to 2021	24
Device payment plan agreement receivables, at amortized cost	3,689
Existing customers | Device payment plan agreement
Financing Receivable, Credit Quality Indicator [Line Items]
2022	16,312
2021	5,544
Prior to 2021	164
Device payment plan agreement receivables, at amortized cost	$ 22,020