Basis of Presentation and Accounting Policies (Details Textual) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015
Accounting Policies [Abstract]
Allowance for doubtful accounts	$ 24.0		$ 24.0		$ 22.0
Allowance for certain customer returns, rebates and incentives	$ 10.7		$ 10.7		9.2
Antidilutive share-based compensation awards	2.9	1.6	2.9	1.7
Capital expenditures in accounts payable or other current liabilities at period end			$ 13.8	$ 9.3
Outstanding purchase of common stock recorded in accounts payable			$ 3.4	$ 6.1
Scenario, Previously Reported [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Current deferred tax assets retrospectively reclassified to noncurrent					$ 151.2