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Stock-Based Compensation Plans (Stock Option Activity) (Details) - $ / shares	12 Months Ended
	Aug. 25, 2018	Aug. 26, 2017	Aug. 27, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of year, Shares	65,800	10,000	167,394
Options granted, shares	72,710	63,800	10,000
Options cancelled, Shares	0	8,000	167,394
Outstanding at end of year, Shares	138,510	65,800	10,000
Exercisable at end of year, Shares	25,263	3,333	0
Vested and expected to vest at end of year, Shares	138,510	65,800	10,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning of year, Wtd. Avg. Exercise Price per Share (in dollars per share)	$ 28.15	$ 16.67	$ 28.30
Options granted, Wtd. Avg. Exercise Price per Share (in dollars per share)	44.40	29.92	16.67
Options cancelled, Wtd. Avg. Exercise Price per Share (in dollars per share)	0.00	27.89	28.30
Outstanding at end of year, Wtd. Avg. Exercise Price per Share (in dollars per share)	36.68	28.15	16.67
Exercisable at end of year, Wtd. Avg. Exercise Price per Share (in dollars per share)	26.64	16.67	0.00
Vested and expected to vest at end of year, Wtd. Avg. Exercise Price per Share (in dollars per share)	$ 36.68	$ 28.15	$ 16.67

X

- Definition

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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

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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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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- Definition

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

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

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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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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 exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. 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 per share amount at which grantees can acquire shares of common stock by exercise of options.

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