Noninterest Income - Summary of Other Noninterest Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Trading Activity, Gains and Losses, Net [Line Items]
Revenue from contracts with customers	$ 352	$ 327
Net losses on revaluation of foreign currency instruments, net of foreign exchange forward contracts	0	(1)
Other service revenue	8	16
Other	21	30
Fund management fees
Trading Activity, Gains and Losses, Net [Line Items]
Revenue from contracts with customers	$ 13	$ 15