Commitments and Contingencies - Off-Balance Sheet Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Residential mortgage
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 200	$ 244	$ 328
CRE
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	9,955	10,243
Indirect other
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	723	588
Commitments to extend, originate, or purchase credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	216,838	198,658
Letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional amount	$ 6,030	$ 5,568