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Mortgage Servicing - Schedule of Composition of Servicing UPB (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Servicing Assets at Fair Value [Line Items] |  |  |  |
MSRs, at fair value | $ 2,374.7 | $ 2,272.2 | $ 2,580.6 | $ 2,665.2
Assets serviced | 171,300.0 | 169,700.0 |  |
UPB of loans transferred | 48,788.7 | 46,810.1 |  |
Owned MSRs |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |
MSRs, at fair value | 1,707.3 | 1,604.6 |  |
Assets serviced | 124,500.0 | 122,700.0 |  |
MAV Transferred MSRs |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |
MSRs, at fair value | 413.6 | 422.8 |  |
Assets serviced | 28,400.0 | $ 28,800.0 |  |
Mortgage Servicing Rights Title Retained | Rithm Transferred Mortgage Servicing Rights |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |
UPB of loans transferred | $ 9,700.0 |  |  |

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