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, 2018	Aug. 31, 2017	Aug. 31, 2016
Income Taxes [Abstract]
Federal statutory income tax rate	25.70%	35.00%	(35.00%)
State income taxes, net of federal effect	2.60%	2.30%	(1.90%)
Effect of change in U.S. federal tax rate	30.00%
Valuation allowance	(50.40%)	(1.20%)	(2.50%)
Foreign jurisdictions tax differential	(6.80%)	(1.90%)	0.60%
Tax differential on income subject to both U.S. and foreign taxes	2.30%	0.40%	(1.90%)
Uncertain tax positions	(5.10%)	4.40%	0.40%
Non-deductible executive compensation	(2.70%)	(1.60%)
Non-deductible meals and entertainment	(8.90%)	(2.20%)	(1.60%)
Payout of deferred compensation (NQDC)	4.40%
Other	2.20%	(0.90%)	0.80%
Income tax rate	(6.70%)	34.30%	(41.10%)