Financial Instruments (Narrative) (Details) In Millions, unless otherwise specified			3 Months Ended		12 Months Ended		3 Months Ended		12 Months Ended		3 Months Ended
	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2014 Foreign Currency Debt [Member] Euro Denominated Member [Member] USD ($)	Dec. 31, 2014 Foreign Currency Debt [Member] Euro Denominated Member [Member] EUR (€)	Sep. 30, 2014 Foreign Currency Debt [Member] Euro Denominated Member [Member] USD ($)	Sep. 30, 2014 Foreign Currency Debt [Member] Euro Denominated Member [Member] EUR (€)	Dec. 31, 2014 Foreign Currency Debt [Member] RMB Denominated Member [Member] USD ($)	Dec. 31, 2014 Foreign Currency Debt [Member] RMB Denominated Member [Member] CNY	Sep. 30, 2014 Foreign Currency Debt [Member] RMB Denominated Member [Member] USD ($)	Sep. 30, 2014 Foreign Currency Debt [Member] RMB Denominated Member [Member] CNY	Dec. 31, 2014 Forward Exchange Contracts [Member]	Dec. 31, 2014 Interest rate management contract [Member]
Derivative [Line Items]
Notional Amount included in designated foreign currency denominated debt			$ 1,089.3	€ 900.0	$ 1,110.6	€ 879.3	$ 148.6	922.7	$ 146.8	900.9
Maximum Remaining Maturity of Foreign Currency Derivatives											3 years 8 months
Maximum length of time of hedged exposures, years												0 years 2 months
Net liability position of derivatives with credit risk-related contingent features	11.7	2.1
Collateral amount that counterparties would be required to post	$ 159.8	$ 107.8