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Basis Of Presentation And Summary Of Significant Accounting Policies (Long-lived Assets) (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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Aug. 31, 2017 | Aug. 31, 2016 | Aug. 31, 2015
Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract] |  |  |
Impairment of long-lived assets | $ 0.0 | $ 0.0 | $ 0.0

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- References No definition available. + Details
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- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
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