Income Taxes (Reconciliations of Unrecognized Tax Benefits) (Details 8) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2013
Income Taxes [Abstract]
Beginning balance	$ 229,684	$ 219,132	$ 113,414
Additions for tax positions of prior years	4,189	16,533	82,965
Reductions for tax positions of prior years	(7,919)	(3,843)	(7,713)
Additions for tax positions related to current year	21,541	18,219	30,886
Adjustments for tax positions related to disposed entities		(1,917)
Adjustments for tax positions related to acquired entities	1,687	(3,195)	21,000
Cash settlements	(11,806)	(9,406)	(1,096)
Reductions from lapses in statutes of limitations	(1,843)	(1,909)	(784)
Reductions from settlements with taxing authorities	(72,812)	(4,344)	(19,930)
Foreign exchange rate adjustment	(8,073)	414	390
Ending balance	154,648	229,684	219,132
Unrecognized tax benefits that would affect the effective tax rate (if recognized)	$ 80,094	$ 72,586	$ 72,618