Line of Business Information - Components of Other (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Fee revenue	$ 10,156	$ 9,480	$ 9,606
Other Income	(79)	(294)	(2)
Deferred incentive compensation expense acceleration	(79)
Net repositioning charges	(2)	(203)
Net acquisition and restructuring costs	0	15	(65)
Income before income tax expense	3,395	2,316	3,327
Net repositioning benefit	(2)	203	78
Other
Segment Reporting Information [Line Items]
Fee revenue	81	0	23
Other Income	(81)	(294)	0
Deferred incentive compensation expense acceleration	(79)	0	0
Net repositioning charges	2	(203)	(70)
Net acquisition and restructuring costs	0	15	(65)
FDIC special assessment and other	(111)	(442)	(10)
Income before income tax expense	(188)	(924)	$ (122)
Gain on sale of equity investment	66
Litigation proceeds	15
Loss on sale of investment securities	81	294
Net repositioning benefit	(15)
Occupancy costs related to real estate footprint optimization	13	21
Compensation and employee benefits expenses related to workforce rationalization		182
FDIC Special Assessment	99	387
Operating model changes	$ 12	$ 41