Contingencies - Schedule of Indemnification Obligations (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Indemnification Obligations Liability [Roll Forward] | ||||
| Beginning balance | $ 23.0 | $ 27.4 | ||
| Provision for (reversal of) representation and warranty obligations | 2.5 | (2.1) | ||
| Provision for representation and warranty obligations - New production liability | 2.4 | 1.5 | ||
| Charge-offs and other | (4.6) | (3.9) | ||
| Ending balance | $ 23.3 | $ 23.0 | 23.3 | 23.0 |
| Servicing and subservicing fees | $ 229.3 | $ 211.3 | $ 451.7 | $ 414.6 |