Accrued Expenses (Details) - USD ($) $ in Thousands	Aug. 31, 2016	Aug. 31, 2015
Accrued Liabilities, Current [Abstract]
Deferred income	$ 893,148	$ 512,481
Accrued compensation and employee benefits	449,183	504,226
Other accrued expenses	586,720	668,882
Accrued expenses	$ 1,929,051	$ 1,685,589