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Fair Value Measurements (Details) - Fair Value, Measurements, Recurring - USD ($)
$ in Millions
Jun. 30, 2015
Sep. 30, 2014
Estimate of Fair Value Measurement    
Non-pension financial assets and liabilities measured at fair value    
Total assets $ 1.5 $ 4.8
Total liabilities 10.8 8.5
Estimate of Fair Value Measurement | Foreign currency forward contracts    
Non-pension financial assets and liabilities measured at fair value    
Total assets 1.5 3.1
Total liabilities 3.3 3.7
Estimate of Fair Value Measurement | Interest rate swap agreements    
Non-pension financial assets and liabilities measured at fair value    
Total assets   1.7
Total liabilities 7.5 4.8
Fair Value, Inputs, Level 2    
Non-pension financial assets and liabilities measured at fair value    
Total assets 1.5 4.8
Total liabilities 10.8 8.5
Fair Value, Inputs, Level 2 | Foreign currency forward contracts    
Non-pension financial assets and liabilities measured at fair value    
Total assets 1.5 3.1
Total liabilities 3.3 3.7
Fair Value, Inputs, Level 2 | Interest rate swap agreements    
Non-pension financial assets and liabilities measured at fair value    
Total assets   1.7
Total liabilities $ 7.5 $ 4.8