Noninterest Income - Summary of Other Noninterest Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 1,314	$ 1,057	$ 880
Net losses on revaluation of foreign currency instruments, net of foreign exchange forward contracts	0	(1)	0
Losses on extinguishment of debt	0	0	(9)
Gains from conversion of convertible debt options	0	30	0
Other service revenue	61	30	31
Total other noninterest income	128	98	55
Fund management fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 67	$ 39	$ 33