Income Taxes (Reconciliation of Income Tax Expense) (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2014
Income Taxes [Abstract]
Tax at U.S. federal statutory income tax rate (35%)	$ 135,470	$ 151,076	$ 25,243
State income taxes, net of federal tax benefit	(5,121)	(4,474)	(3,740)
Impact of foreign tax rates	(144,521)	(157,827)	(19,621)
Permanent impact of non-deductible cost	3,408	8,951	10,995
Income tax credits	(5,040)	(12,773)	(5,632)
Changes in tax rates on deferred tax assets and liabilities	182	(1,206)	(23,432)
Valuation allowance	11,770	72,604	47,697
Non-deductible equity compensation	18,350	11,600	31,236
Impact of intercompany charges and dividends	94,596	49,843	9,376
Other, net	23,055	19,667	1,589
Total income tax expense	$ 132,149	$ 137,461	$ 73,711