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Fair Value Measurement - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Nonrecurring - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Certain impaired loans | $ 2,469 | $ 197
Loans held for sale | 335 |
Other assets | 52 | 50
Total assets at fair value | 2,856 | 247
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Certain impaired loans | 0 | 0
Loans held for sale | 0 |
Other assets | 0 | 0
Total assets at fair value | 0 | 0
Significant Other Observable Inputs (Level 2) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Certain impaired loans | 0 | 0
Loans held for sale | 335 |
Other assets | 0 | 0
Total assets at fair value | 335 | 0
Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Certain impaired loans | 2,469 | 197
Loans held for sale | 0 |
Other assets | 52 | 50
Total assets at fair value | $ 2,521 | $ 247

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