Capitalized Interest (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Mar. 31, 2025 |
Sep. 30, 2024 |
Mar. 31, 2024 |
Sep. 30, 2023 |
|
| Statement [Line Items] | ||||||||
| Real Estate Inventory, Capitalized Interest Costs | $ 78.3 | $ 64.5 | $ 78.3 | $ 64.5 | $ 71.9 | $ 63.0 | $ 62.1 | $ 58.4 |
| Interest incurred | 13.4 | 8.2 | 32.3 | 24.5 | ||||
| Interest charged to cost of sales | $ (7.0) | $ (5.8) | $ (17.0) | $ (18.4) | ||||