Revenues and Contract Costs - Contract with Customer, Asset and Liability (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Jan. 01, 2023	Dec. 31, 2022	Jan. 01, 2022
Revenue from Contract with Customer [Abstract]
Revenue recognized related to contract liabilities existing	$ (4,300)	$ (4,300)
Contract asset, current	580			$ 656
Contract asset, noncurrent	197			207
Contract asset	777	909	$ 863	863	$ 934
Contract liability, current	6,693			6,583
Contract liability, noncurrent	1,730			1,651
Contract liability	$ 8,423	$ 7,504	$ 8,234	$ 8,234	$ 7,229