Total Equity - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 106,598
OCI during the period	(1,835)	$ (853)
Ending balance	104,075	107,588
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(3,102)	(1,962)
OCI during the period	(1,800)	(792)
Ending balance	(4,902)	(2,754)
CTA
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,002)	(795)
OCI during the period	(48)	(141)
Ending balance	(1,050)	(936)
AFS Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	245	1,787
OCI during the period	(2,395)	(776)
Ending balance	(2,150)	1,011
Pension and Other
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(551)	(498)
OCI during the period	5	5
Ending balance	(546)	(493)
DVA
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,794)	(2,456)
OCI during the period	638	120
Ending balance	$ (1,156)	$ (2,336)