Summary of Significant Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

A summary of items impacted as the result of adopting ASC 606 follows:

	As of September 30, 2019
	As Reported		Impact of Adoption			As Adjusted
	(In millions)
Real estate	$	1,028.9	$	2.1		$	1,026.8
Contract liabilities	2.5		2.5			—
Deferred income	9.3		(0.4		)	9.7

Inventory, Interest Capitalization Policy [Table Text Block]

The following table summarizes the Company’s interest costs incurred, capitalized and expensed for fiscal 2019 and the nine months ended September 30, 2018.

	Year Ended   September 30, 2019			Nine Months Ended   September 30, 2018
	(In millions)
Capitalized interest, beginning of period	$	3.2		$	0.5
Interest incurred	25.3			7.3
Interest expensed:
Directly to interest expense	—			(3.7		)
Charged to cost of sales	(4.8		)	(0.9		)
Capitalized interest, end of period	$	23.7		$	3.2

Schedule of Property, Plant and Equipment

	Estimated Useful Lives	September 30,
		2019			2018
		(In millions)
Buildings and building improvements	10 to 40 years	$	0.9		$	0.3
Property and equipment	2 to 10 years	3.4			3.1
Total property and equipment		4.3			3.4
Accumulated depreciation		(1.9		)	(1.7		)
Property and equipment, net		$	2.4		$	1.7