Note 9. Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 23, 2013	Feb. 25, 2012	Feb. 23, 2013	Feb. 25, 2012
Effective Income Tax Rate, Continuing Operations	38.40%	38.30%	38.70%	38.30%
Income Tax Reconciliation, Nondeductible Expense, Share-based Compensation Cost (in Dollars)			$ 0.4