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Derivatives (Details) (Forward Contracts [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, notional amount $ 26.8    
Cost of Sales [Member] | Cash Flow Hedging [Member]
     
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative instruments, income statement location of gain (loss) reclassified from accumulated OCI Cost of goods sold    
Derivative instruments, gain (loss) reclassified from accumulated OCI into income, effective portion, net 1.2 (0.2)  
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months     $ 2.8