Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Employee Termination Benefits
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at January 1	$ 43	$ 470	$ 7
Additions (reductions) charged to expense	1	(30)	859
Payments/ reductions	(33)	(397)	(396)
Balance at December 31	11	43	470
Expected Credit Losses
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at January 1	745	671	849
Current period provision	263	74	573
Additions (reductions) charged to expense	0	0	(751)
Balance at December 31	1,008	745	671
Deferred Income Tax Valuation Allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at January 1	17,651	17,762	15,965
Additions (reductions) charged to expense	3,533	3,691	2,892
Payments/ reductions	(1,652)	(3,802)	(1,095)
Balance at December 31	19,532	$ 17,651	$ 17,762
Deferred Income Tax Valuation Allowance | Noble
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Additions (reductions) charged to expense	$ 974