Investment Securities - Schedule Of Investments Within The Available For Sale Portfolio That Had Unrealized Losses (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Unrealized Losses
Fair value, less than 12 months	$ 4,554	$ 4,936
Unrealized losses, less than 12 months	(487)	(90)
Fair value, 12 months or longer	4,037	522
Unrealized loss, 12 months or longer	(801)	(22)
Fair value, total	8,591	5,458
Unrealized losses, total	(1,288)	(112)
Government agency issued MBS
Unrealized Losses
Fair value, less than 12 months	2,314	2,973
Unrealized losses, less than 12 months	(249)	(41)
Fair value, 12 months or longer	2,350	184
Unrealized loss, 12 months or longer	(446)	(8)
Fair value, total	4,664	3,157
Unrealized losses, total	(695)	(49)
Government agency issued CMO
Unrealized Losses
Fair value, less than 12 months	1,104	1,436
Unrealized losses, less than 12 months	(123)	(37)
Fair value, 12 months or longer	1,209	248
Unrealized loss, 12 months or longer	(246)	(10)
Fair value, total	2,313	1,684
Unrealized losses, total	(369)	(47)
Other U.S. government agencies
Unrealized Losses
Fair value, less than 12 months	643	459
Unrealized losses, less than 12 months	(67)	(11)
Fair value, 12 months or longer	424	90
Unrealized loss, 12 months or longer	(95)	(4)
Fair value, total	1,067	549
Unrealized losses, total	(162)	(15)
States and municipalities
Unrealized Losses
Fair value, less than 12 months	493	68
Unrealized losses, less than 12 months	(48)	(1)
Fair value, 12 months or longer	54	0
Unrealized loss, 12 months or longer	(14)	0
Fair value, total	547	68
Unrealized losses, total	$ (62)	$ (1)