Segment and Geographic Information (Tables)

12 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Segment Reporting

	As of and for the year ended September 30,
	2017			2016			2015
(In millions)
Sales
Materials	$	829.7		$	756.7		$	743.4
Delivery Systems and Services	293.6			213.4			265.9
Corporate	3.6			—			—
Combined Total	$	1,126.9		$	970.1		$	1,009.3
Operating Income (Loss)
Materials	$	274.4		$	252.3		$	213.7
Delivery Systems and Services	71.7			50.8			49.1
Corporate	(20.5		)	(23.3		)	(19.2		)
Segment Total	325.6			279.8			243.6
Business separation, restructuring and cost reduction actions	(25.5		)	(0.9		)	(21.6		)
Combined Total	$	300.1		$	278.9		$	222.0
Depreciation and Amortization
Materials	$	43.1		$	44.4		$	48.1
Delivery Systems and Services	1.4			2.1			8.3
Corporate	1.5			0.4			0.5
Combined Total	$	46.0		$	46.9		$	56.9
Equity Affiliates’ Income
Materials	$	—		$	0.2		$	1.0
Combined Total	$	—		$	0.2		$	1.0
Total Assets
Materials	$	773.8		$	733.4		$	754.8
Delivery Systems and Services	110.9			104.0			92.7
Corporate	362.1			206.4			39.9
Combined Total	$	1,246.8		$	1,043.8		$	887.4
Investment in Net Assets of and Advances to Equity Affiliates
Materials	$	—		$	—		$	12.5
Combined Total	$	—		$	—		$	12.5
Expenditures for Long-Lived Assets
Materials	$	45.7		$	34.4		$	21.2
Delivery Systems and Services	1.7			0.7			0.8
Corporate	16.6			0.7			0.1
Combined Total	$	64.0		$	35.8		$	22.1

Sales by Product Group

	Year Ended September 30,
	2017		2016		2015
(In millions)
Process Materials	$	401.8	$	387.4	$	387.3
Advanced Materials	427.9		369.3		356.1
Equipment and Installations	235.4		150.8		208.3
Site Services	58.2		62.6		57.6
Corporate	3.6		—		—
Total	$	1,126.9	$	970.1	$	1,009.3

Geographic Information

	Year Ended September 30,
	2017		2016		2015
(In millions)
Sales to External Customers
United States	$	375.7	$	349.4	$	361.3
Taiwan	242.8		230.8		236.3
South Korea	304.1		217.2		220.3
China	64.9		53.8		70.9
Europe	63.1		57.8		69.2
Asia, excluding China, Taiwan, and South Korea	76.3		61.1		51.3
Total	$	1,126.9	$	970.1	$	1,009.3

	September 30,
	2017		2016		2015
(In millions)
Long-Lived Assets(A)
United States	$	170.3	$	138.3	$	139.9
South Korea	112.2		112.2		105.0
Taiwan	38.2		36.8		39.7
Asia, excluding Taiwan and South Korea	9.2		9.0		16.4
Europe	0.4		0.2		0.1
Total	$	330.3	$	296.5	$	301.1

^(A)  Long-lived assets include plant and equipment, net.