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Mortgage Servicing - Schedule of Composition of Servicing UPB (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Servicing Assets at Fair Value [Line Items] |  |  |  |
MSR UPB | 199,600.0 | 205,600.0 |  |
Servicing Asset at Fair Value, Amount | $ 2,665.2 | $ 2,250.1 | $ 1,294.8 | $ 1,486.4
UPB of loans transferred | $ 37,571.1 | 31,864.8 |  |
NRZ |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |
MSR UPB | 10,800.0 |  |  |
UPB of loans transferred | $ 36,400.0 |  |  |
MAV |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |
UPB of loans transferred | $ 7,400.0 | $ 24,900.0 |  |
Owned Mortgage Servicing Rights |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |
MSR UPB | 126,200.0 | 127,900.0 |  |
Servicing Asset at Fair Value, Amount | $ 1,710.6 | $ 1,422.5 |  |
NRZ Transferred Mortgage Servicing Rights |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |
MSR UPB | 47,300.0 | 53,700.0 |  |
NRZ Transferred Mortgage Servicing Rights | NRZ |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |
Servicing Asset at Fair Value, Amount | $ 601.2 | $ 558.9 |  |
MAV Transferred Mortgage Servicing Rights |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |
MSR UPB | 26,100.0 | 24,000.0 |  |
Servicing Asset at Fair Value, Amount | $ 353.4 | $ 268.7 |  |

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