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Weighted Average Black Scholes Fair Value Assumptions (Detail)
8 Months Ended
Sep. 03, 2016
Sep. 05, 2015
Black Scholes valuation assumptions [Abstract]    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 6 years 7 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 1.40% 1.80%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 12.00% 15.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 2.70% 2.70%