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Mortgage Servicing Rights and Related Liabilities - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Servicing Assets at Fair Value [Line Items] |  |  |
Excess spread financing - fair value | $ 366 |  | $ 386
Excess Spread Financing UPB, Fair Value Disclosure | 64,839 |  | $ 66,519
Sale of Excess Yield, UPB | 20,562 |  |
Sale of Excess Yield, Total Proceeds | 138 |  |
Gain on Sale of Excess Yield | (10) |  |
Forward MSRs Sold |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |
Unpaid principal balance sold | 1,505 | $ 3,144 |
Forward MSRs Sold, Subservicing Retained |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |
UPB | $ 1,299 | $ 3,003 |

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