Share-Based Payments - Schedule of Nonvested Restricted Stock Units Activity (Detail)	3 Months Ended
Nov. 21, 2020 $ / shares shares
Share-Based Payments
Nonvested, Beginning balance, Number of Shares \| shares	14,160
Granted, Number of Shares \| shares	6,328
Vested, Number of Shares \| shares	(4,069)
Canceled or forfeited, Number of Shares \| shares	(20)
Nonvested, Ending balance, Number of Shares \| shares	16,399
Nonvested, Beginning balance, Weighted Average Grant Date Fair Value \| $ / shares	$ 910.63
Granted, Weighted Average Grant Date Fair Value \| $ / shares	1,139.99
Vested, Weighted Average Grant Date Fair Value \| $ / shares	888.78
Canceled or forfeited, Weighted Average Grant Date Fair Value \| $ / shares	962.49
Nonvested, Ending balance, Weighted Average Grant Date Fair Value \| $ / shares	$ 1,004.49

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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-Publisher FASB
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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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-Publisher FASB
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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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