Revenue Recognition - Deferred Revenue (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Movement in Deferred Revenue [Roll Forward] | ||||
| Balance at beginning of period | $ 113.0 | $ 112.0 | $ 115.4 | $ 111.3 |
| New contracts sold | 9.9 | 15.3 | 33.1 | 38.5 |
| Revenue recognized on existing contracts | (12.4) | (13.6) | (38.0) | (36.1) |
| Balance at end of period | $ 110.5 | $ 113.7 | $ 110.5 | $ 113.7 |