Accumulated Other Comprehensive Income (Loss) - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Jun. 30, 2026 |
Mar. 31, 2026 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Accumulated Other Comprehensive Income | ||||||||
| Beginning balance | $ 1,587.4 | $ 1,562.7 | $ 1,543.9 | $ 1,496.1 | $ 1,461.8 | $ 1,428.6 | $ 1,543.9 | $ 1,428.6 |
| Other comprehensive income before reclassifications | 3.0 | 4.2 | 3.5 | 27.1 | ||||
| Amounts reclassified from accumulated other comprehensive loss | 0.5 | 1.5 | ||||||
| Net current-period other comprehensive income | 3.0 | (1.8) | 2.3 | 4.7 | 10.4 | 13.5 | 28.6 | |
| Ending balance | 1,627.9 | 1,587.4 | 1,562.7 | 1,521.1 | 1,496.1 | 1,461.8 | 1,627.9 | 1,521.1 |
| Total | ||||||||
| Accumulated Other Comprehensive Income | ||||||||
| Beginning balance | 22.4 | 24.2 | 21.9 | (41.5) | (51.9) | (65.4) | 21.9 | (65.4) |
| Net current-period other comprehensive income | 3.0 | (1.8) | 2.3 | 4.7 | 10.4 | 13.5 | ||
| Ending balance | 25.4 | 22.4 | 24.2 | (36.8) | (41.5) | (51.9) | 25.4 | (36.8) |
| Unrealized Translation Adjustments | ||||||||
| Accumulated Other Comprehensive Income | ||||||||
| Beginning balance | 21.8 | 21.3 | 17.5 | (5.4) | 21.3 | (5.4) | ||
| Other comprehensive income before reclassifications | 3.0 | 4.2 | 3.5 | 27.1 | ||||
| Amounts reclassified from accumulated other comprehensive loss | 0.0 | 0.0 | ||||||
| Net current-period other comprehensive income | 4.2 | 27.1 | ||||||
| Ending balance | 24.8 | 21.8 | 21.7 | 17.5 | 24.8 | 21.7 | ||
| Pension Plans | ||||||||
| Accumulated Other Comprehensive Income | ||||||||
| Beginning balance | 0.6 | $ 0.6 | (59.0) | $ (60.0) | 0.6 | (60.0) | ||
| Other comprehensive income before reclassifications | 0.0 | 0.0 | 0.0 | 0.0 | ||||
| Amounts reclassified from accumulated other comprehensive loss | 0.5 | 1.5 | ||||||
| Net current-period other comprehensive income | 0.5 | 1.5 | ||||||
| Ending balance | $ 0.6 | $ 0.6 | $ (58.5) | $ (59.0) | $ 0.6 | $ (58.5) | ||