Revenue (Tables)

12 Months Ended

Sep. 30, 2020

Revenues [Abstract]

Revenue from External Customers by Products and Services [Table Text Block]

Revenues consist of:

	Year Ended September 30,				Nine Months Ended September 30, 2018
	2020		2019
	(In millions)
Residential lot sales	$	880.3	$	351.7	$	72.0
Residential tract sales	48.6		55.8		3.6
Commercial tract sales	2.5		18.5		2.0
Other	0.4		2.3		0.7
	$	931.8	$	428.3	$	78.3