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Assets Held for Sale and Associated Liabilities - Summary of Assets and Liabilities Related to the Sale (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Servicing Assets at Fair Value [Line Items] |  |
Other assets | $ 60 |
Assets held for sale | 1,631 | $ 0
Liabilities associated with assets held for sale | 471 | $ 0
Discontinued Operations, Held-for-Sale |  |
Servicing Assets at Fair Value [Line Items] |  |
Mortgage servicing rights | 1,105 |
Loans | 465 |
Other assets | 61 |
Assets held for sale | 1,631 |
Other liabilities | 471 |
Liabilities associated with assets held for sale | $ 471 |

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