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Share-Based Compensation - Weighted-Average Assumptions Used for Employee Purchase Rights Granted Under Stock Purchase Plan (Detail) (USD $)
9 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected dividend yield 0.00% 0.00%
Stock Purchase Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair market value $ 41.69 $ 34.93
Option price $ 39.61 $ 33.18
Expected dividend yield 0.00% 0.00%
Expected volatility 17.00% 21.00%
Risk free interest rate 0.05% 0.06%