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Share Based Compensation (Summary Of Weighted Average Assumptions) (Details) - $ / shares	12 Months Ended
	Aug. 31, 2015	Aug. 31, 2014
Share Based Compensation [Abstract]
Risk-free interest rate	2.00%	1.90%
Dividend yield	1.30%	0.70%
Expected life (years)	7 years	7 years
Volatility	53.60%	55.20%
Weighted average grant date fair value of options granted	$ 40.66	$ 40.40

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (f)(2)(iii)



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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Weighted average expected volatility rate of share-based compensation awards.

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-Name Accounting Standards Codification



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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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-Publisher FASB



-Name Accounting Standards Codification



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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef



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-Section S99



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