Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current income tax expense:
U.S. federal	$ 1,656	$ 1,122	$ 1,108
U.S. state and local	351	339	276
Non-U.S.	328	639	437
Total current income tax expense	2,335	2,100	1,821
Deferred income tax (benefit) expense:
U.S. federal	231	(931)	(58)
U.S. state and local	22	(119)	(31)
Non-U.S.	41	111	(62)
Total deferred income tax (benefit) expense	294	(939)	(151)
Income tax provision (benefit)	$ 2,629	$ 1,161	$ 1,670