Income Taxes (Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2016
Current
U.S. – Federal	$ 69,080	$ 2,436	$ (649)
U.S. – State	134	12	(166)
Non-U.S.	178,790	188,872	157,069
Total current income taxes	248,004	191,320	156,254
Deferred
U.S. – Federal	(24,342)	253	73
U.S. – State	93	30	9
Non-U.S.	62,105	(62,537)	(24,187)
Total deferred income taxes	37,856	(62,254)	(24,105)
U.S. – Federal	44,738	2,689	(576)
U.S. – State	227	42	(157)
Non-U.S.	240,895	126,335	132,882
Total income tax expense	$ 285,860	$ 129,066	$ 132,149