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Financial Instruments (Foreign Exchange Risk and Its Effect on Income Statement) (Details) (Foreign Exchange Contract, Other income, net, USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Foreign Exchange Contract | Other income, net
   
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of net loss recognized in income $ (3.8) $ 6.9