Equities - Noncontrolling Interests (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2013
Noncontrolling Interest [Line Items]
Net income	$ 780,333	$ 1,083,007	$ 996,328
Net income attributable to CHS Inc.	$ 781,045	$ 1,081,435	$ 992,386