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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%

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