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Performance Contingent ROIC Shares (Detail) (Grant Date Sixteen July Two Thousand And Twelve, Return On Invested Capital, USD $)
12 Months Ended
Dec. 29, 2012
Grant Date Sixteen July Two Thousand And Twelve | Return On Invested Capital
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Shares granted 137,500
Vesting date Feb. 28, 2014
Fair value per share $ 21.56