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Mortgage Servicing - Schedule of Composition of Servicing UPB (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | ---
Servicing Assets at Fair Value [Line Items] |  |  |  |  |  |
MSRs, at fair value | $ 2,675.7 | $ 2,580.6 | $ 2,665.2 | $ 2,485.7 | $ 2,323.3 | $ 2,250.1
Assets serviced | 197,400.0 |  | 199,600.0 | 194,500.0 |  |
UPB of loans transferred | 40,875.0 |  | 37,571.1 |  |  |
Owned MSRs |  |  |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |  |  |
MSRs, at fair value | 1,643.7 |  | 1,710.6 | 1,552.6 |  |
Assets serviced | 121,100.0 |  | 126,200.0 | 116,300.0 |  |
Rithm Transferred Mortgage Servicing Rights |  |  |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |  |  |
MSRs, at fair value | 702.0 |  | 601.2 | 550.8 |  |
Assets serviced | 53,400.0 |  | 47,300.0 | 49,700.0 |  |
MAV Transferred MSRs |  |  |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |  |  |
MSRs, at fair value | 330.0 |  | 353.4 | 382.2 |  |
Assets serviced | 22,900.0 |  | $ 26,100.0 | $ 28,500.0 |  |
Mortgage Servicing Rights Title Retained | Rithm Transferred Mortgage Servicing Rights |  |  |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |  |  |
UPB of loans transferred | $ 10,300.0 |  |  |  |  |

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