Summary of Significant Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Goodwill by reporting segment

The Company’s goodwill balances by reporting segment were as follows:

	September 30,
	2021		2020
	(In millions)
Northwest	$	2.2	$	2.2
Southwest	—		—
South Central	15.9		15.9
Southeast	6.0		6.0
East	60.5		60.5
North	49.7		49.7
Forestar	29.2		29.2
Total goodwill	$	163.5	$	163.5