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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. 27, 2014
Sep. 28, 2013
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 $ 63.42 $ 41.69
Option price $ 60.25 $ 39.61
Expected dividend yield 0.00% 0.00%
Expected volatility 31.00% 17.00%
Risk free interest rate 0.06% 0.05%