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Document and Entity Information (USD $)
 3 Months Ended
Nov. 30, 2014
Jan. 07, 2015
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  
Document Type 10-Q  
Document Period End Date Nov. 30, 2014  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   0dei_EntityCommonStockSharesOutstanding
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Public Float