Restructuring - Schedule of Restructuring Related Liabilities (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Restructuring Reserve [Roll Forward] | ||||
| Beginning Balance | $ 20.3 | $ 4.8 | $ 24.6 | $ 17.0 |
| Cash restructuring charges | 1.6 | 3.3 | 6.3 | 6.2 |
| Cash payments | (6.8) | (4.5) | (15.7) | (19.6) |
| Ending Balance | 15.2 | 3.6 | 15.2 | 3.6 |
| Severance and other personnel costs | ||||
| Restructuring Reserve [Roll Forward] | ||||
| Beginning Balance | 18.6 | 1.8 | 23.8 | 12.7 |
| Cash restructuring charges | (0.8) | 0.6 | (1.2) | 0.1 |
| Cash payments | (3.6) | (1.4) | (8.4) | (11.8) |
| Ending Balance | 14.1 | 1.0 | 14.1 | 1.0 |
| Exit and disposal costs and professional fees | ||||
| Restructuring Reserve [Roll Forward] | ||||
| Beginning Balance | 1.7 | 3.1 | 0.8 | 4.3 |
| Cash restructuring charges | 2.5 | 2.7 | 7.5 | 6.1 |
| Cash payments | (3.1) | (3.2) | (7.3) | (7.8) |
| Ending Balance | $ 1.0 | $ 2.6 | $ 1.0 | $ 2.6 |