Inventory (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Inventory [Line Items] | ||||
| Carrying Value of Communities Impaired | $ 14.3 | $ 14.3 | ||
| Impairment charges | 3.7 | $ 15.9 | 6.7 | $ 24.5 |
| Loss on Contract Termination | $ 18.2 | $ 38.3 | $ 58.5 | $ 76.3 |