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, 2016	Aug. 31, 2015	Aug. 31, 2014
Income Taxes [Abstract]
Federal statutory income tax rate	35.00%	35.00%	35.00%
State income taxes, net of federal effect	1.90%	2.30%	1.90%
Valuation allowance	2.50%
Foreign jurisdictions tax differential	(0.60%)	1.20%	(0.40%)
Tax differential on income subject to both U.S. and foreign taxes	1.90%	0.50%	0.50%
Effect of claiming foreign tax credits instead of deductions for prior years		(3.20%)	(19.30%)
Uncertain tax positions	(0.40%)	(0.90%)	(2.60%)
Non-deductible executive compensation		0.20%	0.90%
Non-deductible meals and entertainment	1.60%	1.10%	0.80%
Other	(0.80%)		0.20%
Income tax rate	41.10%	36.20%	17.00%