Share-Based Payments - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Aug. 29, 2020	Aug. 31, 2019	Aug. 25, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of discount on salary and bonus	25.00%
Weighted average grant date fair value of options granted	$ 252.54	$ 208.37	$ 129.12
Share-based compensation expense	$ 44,835	$ 43,255	$ 43,674
Share-based compensation expense for unvested awards not yet recognized in earnings	$ 42,000
Weighted average period recognition of share-based compensation expense for unvested awards	1 year 8 months 12 days
Exercise period of vested options after death	1 year
Intrinsic value of options exercised	$ 101,900	227,400	123,100
Total fair value of options vested	39,100	34,500	35,700
Expense related to the discount on the selling of shares to employees and executives	$ 3,100	$ 2,800	$ 2,100
Shares sold to employees under employee stock purchase plan	10,525	11,011	14,523
Shares purchased from employees at fair value	8,287	17,201	11,816
Common stock reserved for future issuance	142,241
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise period of vested options after service period	90 days
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise period of vested options after service period	30 days
Two Thousand Three Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accrued director fees	$ 5,700	$ 11,200
Additional shares of stock or units	0
Accrued director fees in shares	4,822	10,206
Executive Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares sold to employees under employee stock purchase plan	1,204	1,483	1,840
Common stock reserved for future issuance	235,361
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non vested restricted stock unit award	$ 9,000
Estimated weighted average period	2 years 8 months 12 days
Service period	4 years
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of options from grant date	10 years or 10 years and one day
2011 Equity Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Debt instrument term	10 years

The value of accrued director fees.

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The number of shares of accrued director fees.

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Number of additional shares to be issued under plan.

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The time period that vested options can be exercised after death.

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Expense related to the discount from the sale of shares to employees and executives.

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Maximum percentage of discount on salary and bonus.

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Exercise period of vested options subsequent to service period.

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Number of shares purchased at fair value from employees who elected to sell their stock.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate number of common shares reserved for future issuance.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of shares issued under share-based payment arrangement.

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Description of terms of award under share-based payment arrangement.

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Intrinsic value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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