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v3.22.2

Basis of Presentation (Details) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2022 USD ($) Segments | Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) | Apr. 30, 2022 USD ($) $ / shares | Sep. 30, 2021 USD ($)
Entity Information [Line Items] |  |  |  |  |
Payments related to business acquisitions |  | $ 271.5 | $ 24.4 |  |
Deferred Income Tax Assets, Net | $ 157.4 | 157.4 |  |  | $ 155.3
Vidler Water Resources, Inc. |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |
Payments related to business acquisitions | 290.5 |  |  |  |
Business Acquisition, Share Price | $ / shares |  |  |  | $ 15.75 |
Business acquisition, cash and cash equivalents acquired |  |  |  | $ 19.0 |
Business acquisition, property and equipment acquired |  |  |  | 30.1 |
Business acquisition, deferred income tax valuation allowance acquired |  |  |  | 16.4 |
Deferred Income Tax Assets, Net |  |  |  | 16.3 |
Business acquisition, intangible and other assets acquired | $ 247.7 | 247.7 |  | 251.0 | 0.0
Business acquisition, total assets acquired |  |  |  | 316.4 |
Business acquisition, other liabilities acquired |  |  |  | 7.7 |
Business acquisition, total liabilities acquired |  |  |  | 7.7 |
Business acquisition, noncontrolling interest |  |  |  | 18.2 |
Business acquisition, net assets acquired |  |  |  | $ 290.5 |
HomeBuildingMember |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |
Number of homebuilding reporting segments | Segments | 6 |  |  |  |
Deferred Income Tax Assets, Net | $ 145.3 | $ 145.3 |  |  | $ 159.2
Forestar Group [Member] |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent | 63.00% | 63.00% |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 37.00% | 37.00% |  |  |
Entity Information [Line Items] |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent | 63.00% | 63.00% |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 37.00% | 37.00% |  |  |

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