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Goodwill and Mortgage Servicing Rights (Goodwill by Business Segment) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2024
Goodwill [Line Items] |  |
Goodwill | $ 10,932 | $ 10,932
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 10,987 |
Goodwill from other increases | (55) |
Goodwill, ending balance | 10,932 |
Retail Banking |  |
Goodwill [Line Items] |  |
Goodwill | 6,473 | 6,473
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 6,473 |
Goodwill, ending balance | 6,473 |
Corporate & Institutional Banking |  |
Goodwill [Line Items] |  |
Goodwill | 4,270 | 4,270
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 4,325 |
Goodwill from other increases | (55) |
Goodwill, ending balance | 4,270 |
Asset Management Group |  |
Goodwill [Line Items] |  |
Goodwill | 189 | $ 189
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 189 |
Goodwill, ending balance | $ 189 |

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