Document and Entity Information - USD ($)	12 Months Ended
	Aug. 31, 2015	Nov. 23, 2015
Document Information [Line Items]
Entity Registrant Name	CHS Inc.
Entity Central Index Key	0000823277
Current Fiscal Year End Date	--08-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-K
Document Period End Date	Aug. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		0
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float	$ 0