Supplemental Balance Sheet Information (Tabular)

3 Months Ended

6 Months Ended

Mar. 31, 2020

Mar. 31, 2020

Balance Sheet Related Disclosures [Abstract]

Schedule Of Selected Supplemental Balance Sheet Information [Table Text Block]

Selected supplemental asset information is presented below.

	March 31,		September 30,
	2020		2019
	(in millions)
Inventories:
Purchased components and raw material	$	103.9	$	95.2
Work in process	38.5		43.7
Finished goods	61.7		52.5
	$	204.1	$	191.4
Other current assets:
Prepaid expenses	$	10.8	$	9.6
Non-trade receivables	7.0		6.3
Maintenance and repair supplies and tooling	4.0		4.2
Income taxes	0.5		4.7
Other	0.6		1.2
	$	22.9	$	26.0
Property, plant and equipment:
Land	$	5.2	$	5.2
Buildings	64.6		68.9
Machinery and equipment	381.9		362.9
Construction in progress	69.3		48.0
	521.0		485.0
Accumulated depreciation	(282.0)		(267.9)
	$	239.0	$	217.1
Other noncurrent assets:
Operating lease right of use asset	$	26.7	$	—
Maintenance and repair supplies and tooling	17.2		16.4
Workers compensation reimbursement receivable	3.0		3.1
Note receivable	1.8		1.8
Other	3.2		2.6
	$	51.9	$	23.9

Schedule of Accrued Liabilities

Selected supplemental liability information is presented below.

	March 31,		September 30,
	2020		2019
	(in millions)
Other current liabilities:
Compensation and benefits	$	23.5	$	28.5
Customer rebates	5.6		8.7
Taxes other than income taxes	2.7		3.3
Warranty	6.6		6.5
Income taxes	2.2		0.6
Environmental	1.2		1.2
Interest	7.3		7.3
Restructuring	0.6		1.7
Walter Energy Accrual	—		22.0
Operating lease liabilities	4.4		—
Deferred revenues	4.1		4.7
Refund liability	4.0		3.3
Other	5.2		5.2
	$	67.4	$	93.0
Other noncurrent liabilities:
Operating lease liabilities	$	24.0	$	—
Warranty	9.4		10.7
Transition tax	4.1		5.8
Unrecognized income tax benefits	3.8		3.3
Asset retirement obligation	3.6		3.6
Pension	2.9		5.0
Workers compensation	1.4		1.9
Other	2.5		2.9
	$	51.7	$	33.2

Schedule of Goodwill

The following table summarizes information concerning our goodwill balance for the six months ended March 31, 2020, in millions.

Balance at beginning of year	$	95.7
Purchase accounting adjustments	0.3
Change in foreign currency exchange rates	1.7
Balance as of March 31, 2020	$	97.7