Inventory (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Inventory [Line Items] | ||||
| Impairment charges | $ 3.0 | $ 5.4 | $ 3.0 | $ 8.6 |
| Loss on Contract Termination | 29.1 | $ 24.6 | 40.4 | $ 38.0 |
| Carrying Value of Communities Impaired | $ 33.1 | $ 33.1 | ||