Significant Accounting Policies - Additional Information (Detail) $ in Thousands	12 Months Ended
	Aug. 28, 2021 USD ($) class store shares	Aug. 29, 2020 USD ($) shares	Aug. 31, 2019 USD ($) shares	Aug. 25, 2018 USD ($)
Significant Accounting Policies [Line Items]
Number of stores with commercial sales program | store	5,179
Description of reporting periods	The Company’s fiscal year consists of 52 or 53 weeks ending on the last Saturday in August. Fiscal 2021 and 2020 represented 52 weeks and 2019 represented 53 weeks.
Cash and cash equivalents	$ 1,171,335	$ 1,750,815	$ 176,300	$ 217,824
Allowances for credit losses	11,400	10,000
Unrecorded adjustment for LIFO value in excess of replacement value	335,300	357,000
Goodwill	302,645	302,645
Self insurance reserve	$ 284,000	288,600
Renewal options and lease term	The leases have varying terms and expire at various dates through 2046. Retail leases typically have initial terms between one and 20 years, with one to six optional renewal periods of one to five years each.
Measure of income tax benefit for uncertain income tax positions	more than 50%
Advertising expense, net of vendor promotional funds	$ 85,900	77,600	87,500
Vendor promotional funds, which reduced advertising expense	$ 53,200	39,400	$ 32,200
Limited warranty period, minimum period (Days)	30 days
Products accounted for total revenues	one class of similar products accounted for approximately 13 percent of the Company’s total revenues, and one vendor supplied approximately 10 percent of the Company’s total purchases. No other class of similar products accounted for 10 percent or more of total revenues
Products accounted for total purchases	one vendor supplied approximately 10 percent of the Company’s total purchases. No other class of similar products accounted for 10 percent or more of total revenues
Auto Parts Stores
Significant Accounting Policies [Line Items]
Goodwill	$ 302,600	302,600
Cash Equivalents [Member]
Significant Accounting Policies [Line Items]
Maturity period of investments	90 days or less
Settlement term of credit and debit card transaction	less than five days
Credit and debit card receivables included within cash and cash equivalents	$ 70,500	$ 63,700
Product Concentration Risk
Significant Accounting Policies [Line Items]
Number of class of similar products accounted for approximately 13% of the company's total revenues | class	1
Stock Options
Significant Accounting Policies [Line Items]
Anti-dilutive shares excluded from the computation of earnings per share | shares	171,652	169,460	90,314
Minimum | Building
Significant Accounting Policies [Line Items]
Estimated useful lives	40 years
Minimum | Building Improvements
Significant Accounting Policies [Line Items]
Estimated useful lives	5 years
Minimum | Equipment
Significant Accounting Policies [Line Items]
Estimated useful lives	3 years
Minimum | Vehicles
Significant Accounting Policies [Line Items]
Finance lease term	1 year
Minimum | Land and Building
Significant Accounting Policies [Line Items]
Finance lease term	20 years
Minimum | Product Concentration Risk | Sales Revenue, Net
Significant Accounting Policies [Line Items]
Concentration risk percentage	10.00%
Minimum | Supplier Concentration Risk | Cost of Goods, Total
Significant Accounting Policies [Line Items]
Concentration risk percentage	10.00%
Maximum | Building
Significant Accounting Policies [Line Items]
Estimated useful lives	50 years
Maximum | Building Improvements
Significant Accounting Policies [Line Items]
Estimated useful lives	15 years
Maximum | Equipment
Significant Accounting Policies [Line Items]
Estimated useful lives	10 years
Maximum | Vehicles
Significant Accounting Policies [Line Items]
Finance lease term	5 years
Maximum | Product Concentration Risk | Sales Revenue, Net
Significant Accounting Policies [Line Items]
Concentration risk percentage	13.00%
Maximum | Supplier Concentration Risk | Cost of Goods, Total
Significant Accounting Policies [Line Items]
Concentration risk percentage	10.00%
Variable Interest Entity Not Primary Beneficiary Member | Other long-term assets
Significant Accounting Policies [Line Items]
Maximum exposure to losses amount	$ 11,800	$ 6,500
Stores in the United States Including Puerto Rico [Member]
Significant Accounting Policies [Line Items]
Number of stores | store	6,051
Brazil [Member]
Significant Accounting Policies [Line Items]
Number of stores | store	52
Mexico [Member]
Significant Accounting Policies [Line Items]
Number of stores | store	664
Non-US [Member]
Significant Accounting Policies [Line Items]
Cash and cash equivalents	$ 80,400	$ 62,400