Restructuring - Schedule of Restructuring Charges (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Cash restructuring charges | ||||
| Severance and other personnel costs | $ (0.8) | $ 0.6 | $ (1.2) | $ 0.1 |
| Exit and disposal costs and professional fees | 2.5 | 2.7 | 7.5 | 6.1 |
| Total cash restructuring charges | 1.6 | 3.3 | 6.3 | 6.2 |
| Non-cash restructuring charges | ||||
| Asset write-downs and write-offs | 0.6 | 15.5 | 7.9 | 20.6 |
| Stock-based compensation expense | 1.1 | 0.0 | 0.8 | 0.0 |
| Total non-cash restructuring charges | 1.7 | 15.5 | 8.7 | 20.6 |
| Total | $ 3.3 | $ 18.8 | $ 15.0 | $ 26.9 |