Employee Benefit Plans - Schedule of Accrued Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Deferred Compensation Liability, Current and Noncurrent [Roll Forward]
Benefits forfeited	$ 0	$ 0
Additional Benefits for Executives, Directors, and Officers
Deferred Compensation Liability, Current and Noncurrent [Roll Forward]
Accrued liability as of January 1	39	43
Accrued liability of acquired banks	2	0
Discount rate adjustment	(2)	(1)
Benefit expense and interest cost	2	2
Benefits paid	(5)	(5)
Accrued liability as of December 31	$ 36	$ 39
Discount rate at December 31	4.67%	3.04%