Income Taxes - Components of Provision for (Benefit from) Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current
U.S. federal	$ 2,554	$ 1,641	$ 873
U.S. state and local	475	399	260
Current income tax expense (benefit)	4,544	3,489	1,899
Deferred
U.S. federal	(11)	(249)	185
U.S. state and local	33	(38)	46
Deferred income tax expense (benefit)	4	(250)	165
Provision for income taxes	4,548	3,239	2,064
U.K.
Current
Non-U.S.	551	395	166
Deferred
Non-U.S.	(37)	(2)	5
Japan
Current
Non-U.S.	105	185	177
Deferred
Non-U.S.	4	12	11
Hong Kong
Current
Non-U.S.	192	185	82
Deferred
Non-U.S.	(9)	(3)	0
Other
Current
Non-U.S.	667	684	341
Deferred
Non-U.S.	$ 24	$ 30	$ (82)