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Fair Value Measurement - Nonrecurring Fair Value Measurements (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans held for sale | $ 1,200 | $ 347
Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans held for investment | 0 | 0
Loans held for sale | 431 | 515
Other investments | 1,329 | 1,329
Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans held for investment | 302,943 | 308,044
Loans held for sale | 0 | 0
Other investments | 0 | 0
Nonrecurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans held for investment | 361 | 545
Loans held for sale | 10 | 37
Other assets | 86 | 214
Total | 457 | 796
Nonrecurring | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans held for investment | 0 | 0
Loans held for sale | 10 | 37
Other assets | 0 | 0
Total | 10 | 37
Nonrecurring | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Loans held for investment | 361 | 545
Loans held for sale | 0 | 0
Other assets | 86 | 214
Total | 447 | 759
Equity investments accounted for under measurement alternative | 31 | 46
Foreclosed property and repossessed assets, fair value disclosure | $ 55 | 45
Long lived assets held for sale |  | $ 123

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