Accrued Expenses and Other - Additional Information (Detail)	12 Months Ended
	Aug. 25, 2018 USD ($)
Workers' Compensation [Member]
Loss Contingencies [Line Items]
Maximum limits per claim for self-insured plan, per annum	$ 2,000,000
Employee Health [Member]
Loss Contingencies [Line Items]
Maximum limits per claim for self-insured plan, per annum	700,000
General and Products Liability [Member]
Loss Contingencies [Line Items]
Maximum limits per claim for self-insured plan, per annum	1,000,000
Vehicles [Member]
Loss Contingencies [Line Items]
Maximum limits per claim for self-insured plan, per annum	3,000,000
Property [Member]
Loss Contingencies [Line Items]
Maximum limits per claim for self-insured plan, per annum	$ 21,500,000