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Income Taxes (Summary Of Activity In Unrecognized Tax Benefits Resulting From Uncertain Tax Positions) (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 28, 2012
Dec. 30, 2011
Income Taxes [Abstract]    
Beginning balance $ 154.4  
Increases related to prior year tax positions 15.7  
Decreases related to settlements with tax authorities (61.3)  
Ending balance 108.8  
Interest and penalties $ 5.9 $ 12.0