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Other Financing Liabilities - Schedule of Financing Liabilities (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Debt Instrument [Line Items] |  |  |  |  |
Other financing liabilities, at fair value | $ 845.9 |  | $ 845.9 |  | $ 900.0
Servicing and subservicing fees | 210.8 | $ 237.6 | 415.3 | $ 469.7 |
Proceeds from other financing liabilities - Excess Servicing Spread (ESS) liability |  |  | 0.0 | $ 68.7 |
Other counterparties for Pledged MSR liab. | Financing Liabilities |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Other financing liabilities, at fair value | 135.3 |  | 135.3 |  | 115.3
ESS Financing Liability |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Other financing liabilities, at fair value | 250.5 |  | 250.5 |  | 248.9
ESS Financing Liability |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Other financing liabilities, at fair value | 590.0 |  | 590.0 |  | 645.5
Residential Asset Securitization Trust |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Other financing liabilities, at fair value | 5.4 |  | 5.4 |  | 5.6
Original Rights to Mortgage Servicing Rights Agreements | ESS Financing Liability |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Other financing liabilities, at fair value | 121.6 |  | 121.6 |  | 121.0
MAV MSR Sale Agreements | ESS Financing Liability |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Other financing liabilities, at fair value | $ 333.1 |  | $ 333.1 |  | $ 409.2

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- Definition This represents the amount of the fee earned, generally expressed as a percent of UPB, from the borrowers’ payments. Also includes late fees, prepayment penalties, float earnings and other ancillary fees. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. 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