Contingencies - Schedule of Indemnification Obligations (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Indemnification Obligations Liability [Roll Forward] | ||
| Beginning balance | $ 23.0 | $ 27.4 |
| Provision for (reversal of) representation and warranty obligations | (1.0) | (1.4) |
| Provision for representation and warranty obligations - New production liability | 1.1 | 0.7 |
| Charge-offs and other | (2.3) | (2.3) |
| Ending balance | 20.8 | 24.5 |
| Servicing and subservicing fees | $ 222.4 | $ 203.3 |