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Derivative Financial Instruments and Hedging Activities (Fair Value of Derivative Instruments) (Details) - Forward foreign exchange contracts - USD ($) $ in Thousands | Aug. 31, 2018 | Aug. 31, 2017
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Designated as Hedging Instruments | Prepaid expenses and other current assets |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives | $ 225 | $ 8,380
Designated as Hedging Instruments | Accrued expenses |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives | 13,364 | 1,408
Not Designated as Hedging Instruments | Prepaid expenses and other current assets |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives | 10,125 | 31,280
Not Designated as Hedging Instruments | Accrued expenses |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives | $ 46,171 | $ 9,131

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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and elected not to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and elected not to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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