Additional Financial Information - Income Statement Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Depreciation expense	$ 14,592	$ 14,119	$ 14,275
Interest costs on debt balances	5,429	5,148	4,632
Net amortization of debt discount	214	178	170
Capitalized interest costs	(2,030)	(1,841)	(555)
Advertising expense	3,556	3,394	3,107
Other income (expense), net
Interest income	146	48	65
Other components of net periodic benefit (cost) income	2,386	3,785	(425)
Net debt extinguishment losses	(1,077)	(3,541)	(129)
Other, net	(82)	20	(50)
Other income (expense), net	$ 1,373	$ 312	$ (539)