Share Based Payments - Stock option Activity (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
Aug. 25, 2018 USD ($) $ / shares shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding, Beginning balance, Number of Shares	1,798,055
Granted, Number of Shares	284,335
Exercised, Number of Shares	(297,616)
Cancelled, Number of Shares	(77,908)
Outstanding, Ending balance, Number of Shares	1,706,866
Exercisable, Number of Shares	1,014,819
Expected to vest, Number of Shares	622,842
Available for future grants, Number of Shares	686,577
Outstanding, Beginning balance, Weighted Average Exercise Price \| $ / shares	$ 493.18
Granted, Weighted Average Exercise Price \| $ / shares	587.57
Exercised, Weighted Average Exercise Price \| $ / shares	298.02
Cancelled, Weighted Average Exercise Price \| $ / shares	672.61
Outstanding, Ending balance, Weighted Average Exercise Price \| $ / shares	534.74
Exercisable, Weighted Average Exercise Price \| $ / shares	446.07
Expected to vest, Weighted Average Exercise Price \| $ / shares	$ 664.77
Outstanding , Weighted-Average Remaining Contractual Term	6 years 21 days
Exercisable, Weighted-Average Remaining Contractual Term	4 years 8 months 23 days
Expected to vest, Weighted-Average Remaining Contractual Term	8 years 7 days
Outstanding, Aggregate Intrinsic Value \| $	$ 402,631
Exercisable, Aggregate Intrinsic Value \| $	329,352
Expected to vest, Aggregate Intrinsic Value \| $	$ 38,387

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, 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 option awards outstanding, 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 fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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

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