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Premises, Equipment, and Leases - Schedule of Lease Expense and Other Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Lease cost |  |  |
Operating lease cost | $ 45 | $ 47 | $ 48
Sublease income | (2) | (2) | (1)
Total lease cost | 43 | 45 | 47
Other information |  |  |
(Gain) loss on right-of-use asset impairment - operating leases | 1 | 1 | 3
Cash paid for amounts included in the measurement of lease liabilities: |  |  |
Operating cash flows from operating leases | 46 | 50 | 53
Right-of-use assets obtained in exchange for new lease obligations: |  |  |
Operating leases | $ 11 | $ 31 | $ 19

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