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Derivatives (Derivatives Not Designated As Hedging Instruments) (Details) (Not Designated as Hedging Instrument [Member], USD $)
In Millions
6 Months Ended
Jun. 26, 2011
Jun. 27, 2010
Dec. 26, 2010
Notional amount of derivatives not designated as hedging instruments $ 25.6   $ 20.7
Derivatives not designated as hedging instruments at fair value 0   0
Amount of Gain (Loss) Recognized In Income 0.6 0.5  
Foreign Exchange Contracts [Member] | Revenue [Member]
     
Amount of Gain (Loss) Recognized In Income (0.2) 0.1  
Foreign Exchange Contracts [Member] | Expenses [Member]
     
Amount of Gain (Loss) Recognized In Income 0.8 0.4  
Foreign Exchange Contracts [Member] | Current Liabilities [Member]
     
Notional amount of derivatives not designated as hedging instruments 25.6   20.7
Derivatives not designated as hedging instruments at fair value $ 0   $ 0