Net Other Operating Income (Loss) (Details 2) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013	Oct. 01, 2007
Deferred Revenue Arrangement [Line Items]
Deferred Revenue, Revenue Recognized	$ 10.0	$ 10.0	$ 10.0
Gain (loss) on foreign currency transactions	$ 17.9	0.3	12.4
Deferred Revenue Amortization Period	10 years
Exclusivity Payment, Patterson
Deferred Revenue Arrangement [Line Items]
Deferred Revenue				$ 100.0
Gain (loss) on foreign currency transactions	$ (3.2)	$ (2.0)	$ 1.9