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Financial Instruments (Narrative) (Details)
€ in Millions, ¥ in Millions, $ in Millions
9 Months Ended 12 Months Ended
Jun. 30, 2015
CNY (¥)
Jun. 30, 2015
EUR (€)
Jun. 30, 2015
USD ($)
Sep. 30, 2014
CNY (¥)
Sep. 30, 2014
EUR (€)
Sep. 30, 2014
USD ($)
Derivative [Line Items]            
Net liability position of derivatives with credit risk-related contingent features     $ 1.2     $ 2.1
Collateral amount that counterparties would be required to post     189.4     107.8
Foreign Currency Debt [Member] | Euro Denominated Member [Member]            
Derivative [Line Items]            
Notional Amount included in designated foreign currency denominated debt   € 757.6 844.3   € 879.3 1,110.6
Foreign Currency Debt [Member] | RMB Denominated Member [Member]            
Derivative [Line Items]            
Notional Amount included in designated foreign currency denominated debt ¥ 1,108.6   $ 178.8 ¥ 900.9   $ 146.8
Forward Exchange Contracts [Member]            
Derivative [Line Items]            
Maximum Remaining Maturity of Foreign Currency Derivatives 3 years 6 months 3 years 6 months 3 years 6 months