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Goodwill and Other Intangibles (Other Intangibles Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Finite and Indefinite-Lived Intangible Assets [Line Items] |  |  |
Amortization expense for other intangibles | $ 89 | $ 104 | $ 110
Mortgage servicing rights |  |  |
Finite and Indefinite-Lived Intangible Assets [Line Items] |  |  |
Net Carrying Amount | 284 | 313 |
Mortgage servicing rights | Fair Value |  |  |
Finite and Indefinite-Lived Intangible Assets [Line Items] |  |  |
Net Carrying Amount | $ 286 | $ 316 |

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