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Taxes on income from continuing operations (Tables)
9 Months Ended
Sep. 30, 2012
Schedule Of Effective Income Tax Rate
     Three Months Ended     Nine Months Ended  
     September 30,
2012
    September 25,
2011
    September 30,
2012
    September 25,
2011
 

Effective income tax rate

     22.8     23.5     (1.4 )%      23.0