Accrued Expenses and Other - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Aug. 25, 2012
Workers' compensation and property [Member]
Loss Contingencies [Line Items]
Maximum limits per claim for self-insured plan, per annum	$ 1.5
Employee health [Member]
Loss Contingencies [Line Items]
Maximum limits per claim for self-insured plan, per annum	0.5
General, products liability, and vehicle [Member]
Loss Contingencies [Line Items]
Maximum limits per claim for self-insured plan, per annum	$ 1.0