Financial Instruments (Schedule of Outstanding Currency Price Risk Management Instruments) (Details) - Forward Exchange Contracts [Member] - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Derivative [Line Items]
US$ Notional	$ 5,898.4	$ 4,032.9
Years Average Maturity	11 months	12 months
Cash Flow Hedges [Member]
Derivative [Line Items]
US$ Notional	$ 4,543.8	$ 2,965.5
Years Average Maturity	6 months	8 months
Net Investment Hedges [Member]
Derivative [Line Items]
US$ Notional	$ 491.3	$ 685.9
Years Average Maturity	4 years	2 years 11 months
Hedges Not Designated [Member]
Derivative [Line Items]
US$ Notional	$ 863.3	$ 381.5
Years Average Maturity	8 months	1 month