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Income Taxes (Differences Between Income Taxes At The Statutory Federal Income Tax Rate And Income Taxes From Continuing Operations) (Details)
12 Months Ended
Aug. 31, 2015
Aug. 31, 2014
Aug. 31, 2013
Income Taxes [Abstract]      
Federal statutory income tax rate 35.00% 35.00% 35.00%
State income taxes, net of federal effect 2.30% 1.90% 1.60%
Foreign jurisdictions tax differential 1.20% (0.40%) 1.00%
Tax differential on income subject to both U.S. and foreign taxes 0.50% 0.50% (3.30%)
Effect of claiming foreign tax credits instead of deductions for prior years (3.20%) (19.30%) (12.20%)
Uncertain tax positions (0.90%) (2.60%) 1.80%
Management stock loan interest and non-deductible expenses     1.30%
Non-deductible executive compensation 0.20% 0.90% 0.90%
Non-deductible meals and entertainment 1.10% 0.80% 0.80%
Other   0.20% (0.70%)
Income tax rate 36.20% 17.00% 26.20%