Contingencies - Schedule of Indemnification Obligations (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Indemnification Obligations Liability [Roll Forward] | ||
| Beginning balance | $ 27.4 | $ 32.9 |
| Provision for (reversal of) representation and warranty obligations | (1.4) | (0.3) |
| Provision for representation and warranty obligations - New production liability | 0.7 | 0.3 |
| Charge-offs and other | (2.3) | 1.8 |
| Ending balance | 24.5 | 34.7 |
| Servicing and subservicing fees | $ 203.3 | $ 204.5 |