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Weighted Average Black Scholes Fair Value Assumptions (Detail)
9 Months Ended
Sep. 06, 2014
Sep. 07, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Expected life 6 years 6 years
Risk free interest rate 1.80% 1.00%
Expected volatility 16.00% 17.00%
Expected dividend yield 2.90% 2.70%