Document and Entity Information - shares	9 Months Ended
	May 31, 2019	Jul. 15, 2019
DEI [Abstract]
Entity Registrant Name	CHS Inc.
Entity Central Index Key	0000823277
Current Fiscal Year End Date	--08-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Document Type	10-Q
Document Period End Date	May 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		0