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v3.21.2

Property, Plant, and Equipment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Net | $ 392.9 | $ 683.7 |
Depreciation | 73.3 | 69.4 | $ 66.1
Rental properties | 821.8 | 0.0 |
Segment Reconciling Items [Member] |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Net | 0.0 | (3.0) |
Home Building |  |  |
Property and Equipment [Line Items] |  |  |
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment | (276.6) | (256.2) |
Property, Plant and Equipment, Net | 303.3 | 286.7 |
Rental properties | 0.0 | 0.0 |
Other Segments [Member] |  |  |
Property and Equipment [Line Items] |  |  |
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment | (28.4) | (28.2) |
Property, Plant and Equipment, Net | 82.6 | 308.9 |
Forestar Group [Member] |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Net | 2.9 | 1.1 |
Rental properties | 0.0 | 0.0 |
Financial Services [Member] |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Net | 3.5 | 3.9 |
Rental properties | 0.0 | 0.0 |
Rental |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Net | 0.6 | 0.0 |
Rental properties | 840.9 | 316.0 |
Rental | Single Family |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Gross | 0.0 | 87.2 |
Rental properties | 415.8 |  |
Rental | Multifamily |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Gross | 0.0 | 232.1 |
Rental properties | 425.1 |  |
HomeBuildingOps GAAP FY2020 |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Net |  | 372.8 |
Building and Building Improvements [Member] | Home Building |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Gross | 299.5 | 267.4 |
2510 Household Furniture [Member] | Home Building |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Gross | 134.1 | 134.0 |
Furniture and Fixtures | Home Building |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Gross | 113.7 | 108.1 |
Furniture and Fixtures | Other Segments [Member] |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Gross | 15.9 | 15.6 |
Rental Property | Rental | Single Family |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Gross | 0.0 | 68.1 |
Rental Property | Rental | Multifamily |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Gross | 0.0 | 173.8 |
Land [Member] | Home Building |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Gross | 32.6 | 32.3 |
Land [Member] | Other Segments [Member] |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Gross | 16.1 | 19.7 |
Land [Member] | Rental | Single Family |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Gross | 0.0 | 19.1 |
Land [Member] | Rental | Multifamily |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Gross | 0.0 | 58.3 |
Other Assets | Other Segments [Member] |  |  |
Property and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Gross | $ 79.0 | $ 69.7 |

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