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v3.25.3

Income Taxes - Deferred Income Taxes (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Sep. 30, 2024
--- | --- | ---
Deferred tax assets: |  |
Inventory costs | $ 39.6 | $ 87.3
Inventory impairments | 13.4 | 8.7
Warranty and construction defect costs | 356.2 | 316.2
Net operating loss carryforwards | 36.5 | 38.9
Tax credit carryforwards | 22.1 | 6.9
Incentive compensation plans | 105.0 | 93.7
Other | 21.2 | 14.0
Total deferred tax assets | 594.0 | 565.7
Valuation allowance | (14.6) | (14.9)
Total deferred tax assets, net of valuation allowance | 579.4 | 550.8
Deferred tax liabilities: |  |
Deferral of profit on home closings | 327.6 | 226.4
Depreciation of fixed assets | 76.7 | 44.8
Deferred Tax Liabilities, Deferral of Income | 31.9 | 29.3
Deferred Tax Liabilities, Undistributed Earnings of Subsidiary | 90.7 | 77.4
Other | 8.0 | 5.4
Total deferred tax liabilities | 534.9 | 383.3
Deferred income taxes, net | 44.5 | 167.5
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards | 36.5 | $ 38.9
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax | 16.5 |
State and Local Jurisdiction [Member] | Home Building |  |
Deferred tax assets: |  |
Net operating loss carryforwards | 10.4 |
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards | 10.4 |
State and Local Jurisdiction [Member] | Home Building | NOL Carryforwards to Expire in One to Ten Years [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Net operating loss carryforwards, subject to expiration | 5.5 |
State and Local Jurisdiction [Member] | Home Building | NOL Carryforward to Expire in Eleven to Twenty Years [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Net operating loss carryforwards, subject to expiration | 4.9 |
State and Local Jurisdiction [Member] | Forestar Group [Member] |  |
Deferred tax assets: |  |
Net operating loss carryforwards | 0.7 |
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards | 0.7 |
Internal Revenue Service (IRS) |  |
Deferred tax assets: |  |
Net operating loss carryforwards | 25.4 |
Operating Loss Carryforwards [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards | $ 25.4 |

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