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Fair Value Measures - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Nonrecurring - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Loans held for investment | $ 2,977 | $ 2,469
Loans held for sale | 2 | 335
Other assets | 52 | 52
Total assets at fair value | 3,031 | 2,856
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Loans held for investment | 0 | 0
Loans held for sale | 0 | 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 |  |
Loans held for investment | 0 | 0
Loans held for sale | 2 | 335
Other assets | 0 | 0
Total assets at fair value | 2 | 335
Significant Unobservable Inputs (Level 3)(1) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Loans held for investment | 2,977 | 2,469
Loans held for sale | 0 | 0
Other assets | 52 | 52
Total assets at fair value | $ 3,029 | $ 2,521

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