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Mortgage Servicing - Summary of Activity Related to Fair Value Servicing Assets (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Beginning balance | $ 2,272.2 | $ 2,665.2 | $ 2,250.1
Servicing Asset at Fair Value, Disposals | (211.0) | (0.1) | (154.4)
Servicing Assets At Fair Value Additions Recognized From Mortgage Sales | 247.6 | 183.0 | 234.7
Purchase of MSRs | 239.6 | 109.9 | 181.6
Servicing transfers and adjustments | 87.1 | 454.3 | 25.3
Servicing assets at fair value, net additions recognized | 189.1 | (161.3) | 236.6
Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs or Changes in Assumptions | $ 232.3 | $ 6.4 | $ 454.0
ServicingAssetAtFairValueOtherChangeInFairValueStatementOfIncomeOrComprehensiveIncomeExtensibleEnumerationNotDisclosedFlag | Realization of cash flows | Realization of cash flows | Realization of cash flows
Servicing Asset at Fair Value, Other Changes in Fair Value | $ (227.4) | $ (238.1) | $ (275.5)
Servicing Asset at Fair Value, Period Increase (Decrease) | 5.0 | (231.7) | 178.5
Ending balance | $ 2,466.3 | $ 2,272.2 | 2,665.2
Financing Receivable, Percent Past Due | 6.50% | 7.50% |
Derivative, Gain (Loss) on Derivative, Net | $ 82.5 | $ 8.2 | 23.5
MSR valuation adjustments, net | (96.2) | (232.2) | (10.4)
ESS Financing Liability |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Changes in fair value | 40.3 | 51.3 | 192.1
Runoff and Settlements | 42.8 | 64.2 | 104.1
Total Fair value changes in Servicing liability at fair value | $ 2.4 | $ 12.9 | (88.0)
Financial Asset, 30 to 59 Days Past Due |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Financing Receivable, Percent Past Due | 3.10% | 3.70% |
Financial Asset, 60 to 89 Days Past Due |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Financing Receivable, Percent Past Due | 1.10% | 1.20% |
Financial Asset, Equal to or Greater than 90 Days Past Due |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Financing Receivable, Percent Past Due | 2.30% | 2.60% |
Fair Value Non Agency Mortgage Servicing Rights |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Beginning balance | $ 221.2 |  |
Ending balance | $ 212.2 | $ 221.2 |
Financing Receivable, Percent Past Due | 18.70% | 21.20% |
Fair Value Non Agency Mortgage Servicing Rights | NRZ |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Servicing Asset At Fair Value, Amount, Derecognition |  | $ (421.7) |
Fair Value Non Agency Mortgage Servicing Rights | Financial Asset, 30 to 59 Days Past Due |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Financing Receivable, Percent Past Due | 8.40% | 9.40% |
Fair Value Non Agency Mortgage Servicing Rights | Financial Asset, 60 to 89 Days Past Due |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Financing Receivable, Percent Past Due | 3.40% | 3.60% |
Fair Value Non Agency Mortgage Servicing Rights | Financial Asset, Equal to or Greater than 90 Days Past Due |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Financing Receivable, Percent Past Due | 6.90% | 8.20% |
Fair Value GSE Mortgage Servicing Rights |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Beginning balance | $ 1,773.9 |  |
Ending balance | $ 1,902.5 | $ 1,773.9 |
Financing Receivable, Percent Past Due | 1.80% | 1.90% |
Fair Value GSE Mortgage Servicing Rights | MAV Asset Vehicle LLC |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Servicing transfers and adjustments |  |  | (39.0)
Servicing Asset At Fair Value, Amount, Derecognition | $ 85.7 | $ (32.5) |
Fair Value GSE Mortgage Servicing Rights | Financial Asset, 30 to 59 Days Past Due |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Financing Receivable, Percent Past Due | 1.00% | 1.20% |
Fair Value GSE Mortgage Servicing Rights | Financial Asset, 60 to 89 Days Past Due |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Financing Receivable, Percent Past Due | 0.20% | 0.20% |
Fair Value GSE Mortgage Servicing Rights | Financial Asset, Equal to or Greater than 90 Days Past Due |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Financing Receivable, Percent Past Due | 0.50% | 0.50% |
Rithm and Other Transferred MSRs |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Beginning balance | $ 244.8 |  |
Ending balance | $ 266.1 | $ 244.8 |
Amount | 19,000.0 | 18,100.0 |
MAV Transferred Mortgage Servicing Rights |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Beginning balance | $ 422.8 |  |
Ending balance | $ 330.6 | $ 422.8 |
Amount | 21,500.0 | 28,800.0 |
Transferred MSR, Subject To Pledged Liability |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Beginning balance | $ 667.6 |  |
Ending balance | $ 596.7 | $ 667.6 |
Amount | 40,500.0 | 46,900.0 |
MSR |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Beginning balance | $ 2,272.2 |  |
Servicing Asset at Fair Value, Period Increase (Decrease) | (5.0) | $ 230.8 | $ (176.4)
Ending balance | $ 2,466.3 | $ 2,272.2 |
Amount | 170,300.0 | 169,700.0 |
Fair Value of GNMA Mortgage Servicing Rights |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Beginning balance | $ 277.1 |  |
Ending balance | $ 351.6 | $ 277.1 |
Financing Receivable, Percent Past Due | 11.80% | 11.80% |
Fair Value of GNMA Mortgage Servicing Rights | Financial Asset, 30 to 59 Days Past Due |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Financing Receivable, Percent Past Due | 5.40% | 6.10% |
Fair Value of GNMA Mortgage Servicing Rights | Financial Asset, 60 to 89 Days Past Due |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Financing Receivable, Percent Past Due | 1.80% | 2.00% |
Fair Value of GNMA Mortgage Servicing Rights | Financial Asset, Equal to or Greater than 90 Days Past Due |  |  |
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |
Financing Receivable, Percent Past Due | 4.50% | 3.70% |

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