Other Financing Liabilities, at Fair Value - Schedule of Activity Related to Financing Liability - MSRs Pledged (Details) - USD ($) $ in Millions |
3 Months Ended | |||
|---|---|---|---|---|
Mar. 01, 2026 |
Jan. 05, 2026 |
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Servicing Asset at Fair Value, Amount [Roll Forward] | ||||
| MSR transfers | $ (20.6) | |||
| Financing Liability Mortgage Servicing Rights Pledged [Member] | ||||
| Servicing Asset at Fair Value, Amount [Roll Forward] | ||||
| Beginning balance | 842.0 | $ 846.9 | ||
| MSR transfers | 9.6 | 6.7 | ||
| Derecognition of financing liability | (17.2) | 0.0 | ||
| ESS settlement | (20.8) | 0.0 | ||
| Changes in fair value due to inputs and assumptions | (0.2) | (1.0) | ||
| Realization of cash flows | (18.7) | (17.0) | ||
| Total fair value (gain) loss | (18.9) | (18.0) | ||
| Ending balance | $ 794.6 | $ 835.5 | ||
| Unpaid Principal Balance, Mortgage Servicing Rights Sold, Subservicing Retained | $ 1,300.0 | |||
| Rithm Capital Corp | Fair Value Non-Agency Mortgage Servicing Rights | ||||
| Servicing Asset at Fair Value, Amount [Roll Forward] | ||||
| UPB of MSR liability | $ 1,200.0 | |||