Receivables - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2025	Aug. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
CHS Capital long-term notes receivable	$ 123.8	$ 74.6
Percentage of commercial notes to CHS Capital long-term notes receivable	24.00%	18.00%
Percentage of producer notes to CHS Capital long-term notes receivable	76.00%	82.00%
Interest income accrual, discontinued, term	90 days
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
CHS Capital short-term notes receivable, term	12 months
Long-term notes receivable, term	10 years
CHS Capital
Accounts, Notes, Loans and Financing Receivable [Line Items]
Additional available credit	$ 1,100.0
CHS Capital Notes Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Note receivables sold under loan participations	$ 48.8	$ 47.9