Securitizations and Variable Interest Entities - Carrying Value and Classification of Assets And Liabilities of PLS Notes Facility (Details) - USD ($) $ in Millions |
Mar. 31, 2025 |
Dec. 31, 2024 |
Mar. 31, 2024 |
|---|---|---|---|
| Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] | |||
| Servicing Asset | $ 2,547.4 | $ 2,466.3 | |
| Debt service account (Restricted cash) | 24.8 | $ 37.2 | |
| Unamortized debt issuance costs | (29.9) | (35.4) | |
| Secured Debt | |||
| Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] | |||
| Unamortized debt issuance costs | 0.0 | (0.1) | |
| 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 | 821.1 | 814.9 | |
| Debt service account (Restricted cash) | 0.1 | 1.8 | |
| Short-Term Debt | 554.8 | 440.7 | |
| Unamortized debt issuance costs | $ 0.0 | $ (0.1) |