Sale of Equity Affiliate (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended			9 Months Ended
	Dec. 31, 2015	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2017	Jun. 30, 2016
Schedule of Equity Method Investments [Line Items]
Income tax provision		$ 14.4	$ 17.6		$ 41.2	$ 43.2
Equity affiliates’ income		$ 0.0	$ 0.0		$ 0.0	$ 0.2
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