Noninterest Income - Investment Banking Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 1,503	$ 1,314	$ 1,057
Underwriting fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	163	304	353
Advisory fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	214	90	40
Private placements and other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 43	$ 65	$ 21