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Inventory (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Inventory Impairments and Land Option Cost Write-Offs [Abstract]
Inventory Write-down	$ 0.0	$ 3.8	$ 5.6	$ 1.7
Write Offs Recoveries Of Earnest Money Deposits And Pre-Acquisition Costs		$ 66.6	$ 23.0	$ 22.1

X

- Definition

Inventory Impairments and Land Option Cost Write-Offs.

+ References

No definition available.

+ Details

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X

- Definition

The net write-off or recovery of earnest money deposits and pre-acquisition costs related to land option contracts during the period.

+ References

No definition available.

+ Details

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X

- Definition

Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=116847112&loc=d3e4542-108314

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