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Debt (Summary of Outstanding Debt) (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Sep. 30, 2013
Debt Instruments [Abstract]    
Short-term borrowings $ 1,228.7 $ 709.9
Current portion of long-term debt 65.3 507.4
Long-term debt 4,824.5 5,056.3
Total Debt $ 6,118.5 $ 6,273.6