Credit Commitments [Abstract]

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- Definition

Maximum Guarantees Allowed by Bank Covenants

+ References

No definition available.

+ Details

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- Definition

Notes and Loans Receivables, Net, Noncurrent, Remaining Borrowing Capacity of Counterparty

+ References

No definition available.

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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248

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- References

No definition available.

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- References

No definition available.

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- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980

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- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2015
Property, Plant and Equipment [Line Items]
Maximum Guarantees Allowed by Bank Covenants	$ 1,000.0
Guarantees [Abstract]
Guarantor obligations, maximum exposure, undiscounted	105.3
Lease Commitments
Operating leases, rent expense, net	72.1	$ 74.7	$ 56.7
CHS Capital [Member]
Credit Commitments [Abstract]
CHS Capital long-term notes receivable additional available credit of counterparty	$ 966.6
Minimum
Lease Commitments
Lessee, Operating Lease, Term of Contract	1 year
Maximum
Lease Commitments
Lessee, Operating Lease, Term of Contract	15 years