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Fair Value Measurements (Details) (Fair Value, Measurements, Recurring, USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014
Estimate of Fair Value Measurement
Non-pension financial assets and liabilities measured at fair value
Total assets	$ 0.7	$ 4.8
Total liabilities	13.8	8.5
Estimate of Fair Value Measurement \| Foreign currency forward contracts
Non-pension financial assets and liabilities measured at fair value
Total assets	0.7	3.1
Total liabilities	3.1	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	10.7	4.8
Fair Value, Inputs, Level 2
Non-pension financial assets and liabilities measured at fair value
Total assets	0.7	4.8
Total liabilities	13.8	8.5
Fair Value, Inputs, Level 2 \| Foreign currency forward contracts
Non-pension financial assets and liabilities measured at fair value
Total assets	0.7	3.1
Total liabilities	3.1	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	$ 10.7	$ 4.8