Concentration of Risk and Segment Data (Segment Revenue) (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2016	May 31, 2015
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	$ 4,310,752	$ 4,358,641	$ 13,922,323	$ 13,218,382
EMS [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	2,846,919	2,741,910	8,228,595	8,001,299
DMS [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	$ 1,463,833	$ 1,616,731	$ 5,693,728	$ 5,217,083