Noninterest Income - Wealth Management and Trust Fees (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Other Income and Expenses [Abstract]
Wealth management fees	$ 17	$ 20	$ 58	$ 20
Trust fees	2	2	5	2
Wealth management and trust fees	$ 19	$ 22	$ 63	$ 22