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Derivatives and Hedging Activities (Details 1) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Effect of derivative instruments on condensed consolidated statement of operations    
Derivative Instruments, Gain (Loss) Recognized in Income, Net, Total $ (2.7) $ 5.9
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
   
Effect of derivative instruments on condensed consolidated statement of operations    
Derivative Instruments, Gain (Loss) Recognized in Income, Net, Total 0.1 0.8
Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
   
Effect of derivative instruments on condensed consolidated statement of operations    
Derivative Instruments, Gain (Loss) Recognized in Income, Net, Total (0.2)  
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
   
Effect of derivative instruments on condensed consolidated statement of operations    
Derivative Instruments, Gain (Loss) Recognized in Income, Net, Total $ (2.6) $ 5.1