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Goodwill and Mortgage Servicing Rights (Narrative) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items] |  |  |
Impairment charges related to goodwill | $ 0 | $ 0 | $ 0
Mortgage servicing rights | 3,711,000,000 | 3,686,000,000 |
Fees from Mortgage and Other Loan Servicing | $ 700,000,000 | $ 700,000,000 | $ 600,000,000

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