Noninterest Income - Lending Related Fees (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lending related fees	$ 26	$ 18	$ 45	$ 34
Unused commitment fees
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lending related fees	20	15	35	28
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lending related fees	$ 6	$ 3	$ 10	$ 6