Revenue (Tables)

12 Months Ended

Sep. 30, 2019

Revenues [Abstract]

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

Revenues consist of:

	Year Ended   September 30, 2019		Nine Months Ended   September 30, 2018		Year Ended   December 31, 2017
	(In millions)
Residential lot sales	$	351.7	$	72.0	$	83.9
Residential tract sales	55.8		3.6		14.6
Commercial tract sales	18.5		2.0		13.0
Other	2.3		0.7		2.8
	$	428.3	$	78.3	$	114.3