Additional Financial Information - Cash Flow Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Paid
Interest, net of amounts capitalized	$ 3,316	$ 3,435	$ 4,420
Income taxes, net of amounts refunded	2,736	3,040	2,725
Other, net Cash Flows from Operating Activities
Changes in device payment plan agreement non-current receivables	(4,919)	(2,438)	558
Net debt extinguishment losses	1,077	3,541	129
Loss on spectrum licenses	0	223	1,195
Net gain on sale of divested businesses	0	(1,051)	0
Other, net	64	(368)	898
Other, net Cash Flows from Operating Activities	(3,778)	(93)	2,780
Other, net Cash Flows from Financing Activities
Net debt related costs	(366)	(2,309)	(1,055)
Other, net	(1,706)	(1,523)	(1,648)
Other, net Cash Flows from Financing Activities	$ (2,072)	$ (3,832)	$ (2,703)