Total Equity - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 103,149	$ 82,697
OCI during the period	(1,140)	826	$ (496)
Ending balance	106,598	103,149	82,697
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,962)	(2,788)	(2,292)
Ending balance	(3,102)	(1,962)	(2,788)
CTA
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(795)	(897)	(889)
OCI during the period	(207)	102	(8)
Ending balance	(1,002)	(795)	(897)
AFS  Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	1,787	207	(930)
OCI during the period	(1,542)	1,580	1,137
Ending balance	245	1,787	207
Pensions and Other
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(498)	(644)	(578)
OCI during the period	(53)	146	(66)
Ending balance	(551)	(498)	(644)
DVA
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(2,456)	(1,454)	105
OCI during the period	662	(1,002)	(1,559)
Ending balance	$ (1,794)	$ (2,456)	$ (1,454)