Derivative Financial Instruments - Schedule of Derivative Instruments Non-Qualifying Hedges (Details) - Not Designated as Hedging Instrument - Other noninterest income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) of non-qualifying hedges	$ 4	$ 0
Interest rate contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) of non-qualifying hedges	4	0
Other contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) of non-qualifying hedges	$ 0	$ 0