Noninterest Income - Lending Related Fees (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Lending related fees	$ 94	$ 76	$ 57
Unused commitment fees
Disaggregation of Revenue [Line Items]
Lending related fees	70	59	42
Other
Disaggregation of Revenue [Line Items]
Lending related fees	$ 24	$ 17	$ 15