Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Fair value of all asset derivatives designated as cash flow hedging instruments.

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-Name Accounting Standards Codification
-Topic 815
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Contractual rate at which a foreign currency can be purchased or sold.

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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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Number of foreign currency exchange rate derivatives held by the entity at the reporting date.

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Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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Derivative Instruments and Hedging Activities - Narrative (Details) $ in Thousands, CAD in Millions	3 Months Ended		9 Months Ended
	May 27, 2017 USD ($)	May 28, 2016 USD ($)	May 27, 2017 USD ($)	May 28, 2016 USD ($)	May 27, 2017 CAD	Aug. 27, 2016 USD ($)	Jan. 31, 2015 CAD contract
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain in accumulated other comprehensive (loss) income, net of tax	$ (32,171)		$ (32,171)			$ (28,949)
Amount reclassified from accumulated other comprehensive (loss) income to revenue related to derivative financial instruments	105	$ 36	208	$ 201
Canadian Dollars
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Average exchange rate							0.7825
Forward Contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional value \| CAD							CAD 31.0
Gain in accumulated other comprehensive (loss) income, net of tax	200		200
Forward Contracts \| Other Long-term Assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional value \| CAD					CAD 11.1
Fair value of the contracts	100		100
Amount reclassified from accumulated other comprehensive (loss) income to revenue related to derivative financial instruments			200
Forward Contracts \| Prepaid Expenses and Other Current Assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value of the contracts	$ 200		$ 200
Forward Contracts \| Canadian Dollars
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of derivatives entered into to exchange Canadian dollars for U.S. dollars \| contract							16