Weighted Average Black Scholes Fair Value Assumptions (Detail)	9 Months Ended
	Sep. 08, 2012		Sep. 03, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Expected life	6 years		6 years
Risk free interest rate	1.30%		2.50%
Expected volatility	17.00%	[1]	16.00%	[1]
Expected dividend yield	3.00%		2.90%

[1] Reflects movements in our stock price over the most recent historical period equivalent to the expected life.