Concentration of Risk and Segment Data (Segment Revenue) (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 29, 2016	Feb. 28, 2015
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	$ 4,403,594	$ 4,309,323	$ 9,611,571	$ 8,859,741
EMS [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	2,657,262	2,625,871	5,381,676	5,259,388
DMS [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenue	$ 1,746,332	$ 1,683,452	$ 4,229,895	$ 3,600,353