Basis of Presentation and Accounting Policies (Details Textual) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Sep. 30, 2016
Accounting Policies [Abstract]
Allowance for doubtful accounts	$ 24.5		$ 24.5		$ 24.5
Allowance for certain customer returns, rebates and incentives	$ 9.6		$ 9.6		$ 7.9
Antidilutive share-based compensation awards	0.6	1.8	0.8	2.6
Capital expenditures in accounts payable or other current liabilities at period end			$ 22.3	$ 19.3
Outstanding purchase of common stock recorded in accounts payable			3.4	$ 8.4
Reduction in income tax provision from early adoption of new share-based compensation standard	$ 4.5		$ 24.7