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Derivatives Derivatives (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 3 Months Ended
Mar. 31, 2014
Mar. 31, 2014
Foreign Currency Contracts
Not Designated as Hedging Instrument
Dec. 31, 2013
Foreign Currency Contracts
Not Designated as Hedging Instrument
Mar. 31, 2014
Cash Flow Hedging
Forward Foreign Currency
Dec. 31, 2013
Cash Flow Hedging
Forward Foreign Currency
Mar. 31, 2014
Cash Flow Hedging
Interest Rate Swap
Dec. 31, 2013
Cash Flow Hedging
Interest Rate Swap
Mar. 31, 2014
Range 1
Mar. 31, 2014
Range 2
Derivative [Line Items]                  
Maximum length of time hedged in cash flow hedge               1 year 2 years
Total notional values   $ 117.9 $ 115.1 $ 10.3 $ 11.2 $ 7.1 $ 7.3    
Cash flow hedge gain to be reclassified into earnings within the next 12 months $ 0.2