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MORTGAGE BANKING AND OTHER SERVICED LOANS - Changes Related to MSRs - Fair Value Method (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
MSRs |  |  |  |  |
Fair value as of beginning of the period |  |  | $ 1,491 |  |
Fair value at end of the period | $ 1,430 |  | 1,430 |  |
Residential mortgages |  |  |  |  |
MSRs |  |  |  |  |
Fair value as of beginning of the period | 1,426 | $ 1,568 | 1,491 | $ 1,552 |
Amounts capitalized | 42 | 28 | 117 | 71 |
Sales | 0 | 0 | (72) | 0 |
Changes in unpaid principal balance | (41) | (46) | (120) | (135) |
Changes in fair value | 3 | (49) | 14 | 13 |
Fair value at end of the period | 1,430 | $ 1,501 | 1,430 | $ 1,501 |
MSR loans | 95,200 |  | 95,200 |  | $ 95,600
Federal Home Loan Mortgage Corporation (FHLMC) |  |  |  |  |
MSRs |  |  |  |  |
MSR loans | $ 10,500 |  | $ 10,500 |  |

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