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Derivative Instruments and Hedging Activities - Changes in Fair Value of Foreign Contracts (Details) (Foreign Exchange Derivative Instruments [Member], Derivatives Not Designated as Hedging Instruments [Member], Other, Net [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Foreign Exchange Derivative Instruments [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Other, Net [Member]
     
Changes in fair value of foreign exchange contracts [Abstract]      
Amount of Gain or (Loss) Recognized in Income on Derivatives $ (3.5) $ (0.4) $ (0.5)