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Receivables - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Nov. 30, 2019
Aug. 31, 2019
Notes Receivable, Long-Term    
CHS Capital long-term notes receivable additional available credit of counterparty $ 538.8  
CHS Capital Notes Receivable [Member]    
Notes Receivable, Long-Term    
CHS Capital long-term notes receivable, non-current, term 10 years  
CHS Capital long-term notes receivable $ 164.3 $ 180.0
Commercial Notes to Notes and Loans Receivable, Net, Percentage 45.00% 41.00%
Producer Notes to Notes and Loans Receivable, Net, Percentage 55.00% 59.00%