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Revenue (Tables) | 12 Months Ended
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Sep. 30, 2025
Revenues [Abstract] |
Revenue from External Customers by Products and Services [Table Text Block] | Revenues consist of:
| Year Ended September 30,
| 2025 |  | 2024 |  | 2023
| (In millions)
Residential lot sales | $ | 1,544.3 |  |  | $ | 1,459.3 |  |  | $ | 1,275.7 |
Deferred development lot sales | — |  |  | 8.1 |  |  | 29.0 |
Tract sales and other | 118.1 |  |  | 42.0 |  |  | 132.2 |
| $ | 1,662.4 |  |  | $ | 1,509.4 |  |  | $ | 1,436.9 |

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- Definition Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-40 + Details
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