Share-Based Payments - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Nov. 19, 2022	Nov. 20, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted	157,113	163,786
Weighted average grant date fair value of options granted	$ 760.82	$ 462.80
Stock options exercised - shares	57,092	47,705
Stock options exercised - weighted average exercise price	$ 725.86	$ 549.86
Unrecognized share-based compensation expense related to stock options, net of forfeitures	$ 158.1
Estimated weighted average period	3 years 6 months
Share-based compensation expense	$ 19.0	$ 14.3
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated weighted average period	3 years
Service period	4 years
Non vested restricted stock unit award	$ 13.7
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Anti-dilutive shares excluded from the computation of earnings per share	87,696	97,942

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Amount of cost to be recognized for option under share-based payment arrangement.

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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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Net number of share options (or share units) granted during the period.

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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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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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

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Number of share options (or share units) exercised during the current period.

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