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Investment in Equity Method Investee (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Nov. 02, 2022 | Nov. 01, 2022
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
UPB of loans serviced on behalf of NRZ | $ 45,000.0 |  |  |  |
ESS Financing Liability |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Changes in fair value |  | $ 14.1 |  |  |
MAV Canopy HoldCo I LLC |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Investment in equity method investee | $ 250.0 |  |  |  | $ 250.0
Ownership percentage | 15.00% |  |  | 15.00% |
Joint Marketing Agreement and Recapture Agreement |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
UPB of MSRs sold | $ 30.9 | 275.1 | $ 0.0 |  |
Oaktree | MAV Canopy HoldCo I LLC |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership percentage | 85.00% |  |  |  |
MAV Asset Vehicle LLC |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
UIPB of loans subserviced | $ 55,900.0 |  |  |  |
UPB of loans serviced on behalf of NRZ |  | 2,900.0 |  |  |
Forward Bulk Servicing Rights Purchase and Sale Agreement |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
UPB of MSRs sold | 0.0 | 6,600.0 | 4,300.0 |  |
Bulk Mortgage Servicing Rights Purchase and Sale Agreements |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
UPB of MSRs sold | 6,800.0 | $ 600.0 | $ 20,700.0 |  |
Mortgage Servicing Rights Title Transferred | MAV Asset Vehicle LLC |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
UPB of loans serviced on behalf of NRZ | 28,800.0 |  |  |  |
Maximum |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Management fee expense | $ 0.4 |  |  |  |

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