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Securitizations and Variable Interest Entities - Carrying Value and Classification of Assets And Liabilities of PLS Notes Facility (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023 | Jun. 30, 2023
--- | --- | --- | ---
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |  |
Servicing Asset | $ 2,327.7 | $ 2,272.2 |
Debt service account (Restricted cash) | 27.0 |  | $ 71.2
Unamortized debt issuance costs | (33.9) | (21.0) |
Secured Debt |  |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |  |
Unamortized debt issuance costs | (0.5) | (0.4) |
Variable Interest Entity, Primary Beneficiary | Secured Debt | Agency and PLS Mortgage Servicing Rights Financing Facility |  |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |  |
Servicing Asset | 518.9 | 449.6 |
Debt service account (Restricted cash) | 1.7 | 1.7 |
Short-Term Debt | 277.2 | 282.1 |
Unamortized debt issuance costs | $ (0.2) | $ (0.4) |

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