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Basis Of Presentation And Summary Of Significant Accounting Policies (Recently Issued Accounting Standards) (Narrative) (Details) $ in Millions	12 Months Ended
	Aug. 31, 2017 USD ($)
Basis Of Presentation And Summary Of Significant Accounting Policies [Abstract]
Possible income tax expense reduction	$ 1.5

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Income Tax Expense, Potential Reduction

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