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Taxes On Income From Continuing Operations (Schedule Of Effective Income Tax Rate) (Detail)
3 Months Ended 6 Months Ended
Jul. 01, 2012
Jun. 26, 2011
Jul. 01, 2012
Jun. 26, 2011
Income Taxes [Line Items]        
Effective income tax rate (0.60%) 21.30% 1.80% 22.60%