Receivables - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
May. 31, 2015	Aug. 31, 2014
Notes Receivable, Long-Term
CHS Capital long-term notes receivable	$ 157.1	$ 159.7
Percentage of commercial notes to CHS Capital long-term notes receivable	45.00%	46.00%
Percentage of producer notes to CHS Capital long-term notes receivable	55.00%	54.00%
Interest Income Accrual Term, Discontinued	90 days
CHS Capital long-term notes receivable additional available credit of counterparty	$ 1,000.0
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes and Loans Receivable, Current, Term	12 months
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes and Loans Receivable, Current, Term	14 months
Notes Receivable, Short-Term
Notes and Loans Receivable, Non Current, Net, Term	10 years

Commercial Notes to Notes and Loans Receivable, Net, Noncurrent, Percentage

No definition available.

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- Definition

Interest Income Accrual Term, Discontinued

+ References

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Notes and Loans Receivable, Current, Term

+ References

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- Definition

Notes and Loans Receivable, Net, Non-Current, Term

+ References

No definition available.

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- Definition

Producer Notes to Notes and Loans Receivable, Net, Noncurrent, Percentage

+ References

No definition available.

+ Details

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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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- References

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- References

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- Definition

An amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date more than one year from the balance sheet date, net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

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