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Securitizations and Variable Interest Entities - Schedule Of Carrying Value and Classification of Assets and Liabilities of Advance Financing Facilities (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023
--- | --- | --- | ---
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |  |
Debt service accounts | $ 37.2 |  | $ 21.5
Advance match funded liabilities | 440.2 | $ 499.7 |
Variable Interest Entity, Primary Beneficiary |  |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |  |
Advance match funded liabilities | 439.5 | 498.9 |
Variable Interest Entity, Primary Beneficiary | Advance match funded liabilities |  |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |  |
Match funded advances (Advances, net) | 506.5 | 573.0 |
Debt service accounts | 11.7 | 15.7 |
Advance match funded liabilities | $ 439.5 | $ 498.9 |

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