Sale of Equity Affiliate (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Schedule of Equity Method Investments [Line Items]
Investment in net assets of and advances to equity affiliates		$ 0.0				$ 12.5				$ 0.0	$ 12.5	$ 14.1
Income tax provision		15.6	$ 17.6	$ 12.2	$ 13.4	3.6	$ 10.8	$ 11.2	$ 6.1	58.8	31.7	31.9
Equity affiliates’ income		$ 0.0	$ 0.0	$ 0.0	0.2	$ 0.3	$ 0.0	$ 0.4	$ 0.3	0.2	1.0	$ 1.7
Daido Air Products Electronics, Inc. | Disposed of by Sale
Schedule of Equity Method Investments [Line Items]
Proceeds from sale of equity method investment	$ 15.9
Realized gain on sale of equity method investment										0.7
Investment in net assets of and advances to equity affiliates	12.8				12.8
Foreign currency translation loss	$ 2.4				$ 2.4
Income tax provision										$ 5.3
Equity affiliates’ income											$ 1.0