Receivables - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
May 31, 2019	May 31, 2019	Aug. 31, 2018
Notes Receivable, Long-Term
Interest Income Accrual Term, Discontinued		90 days
CHS Capital long-term notes receivable additional available credit of counterparty	$ 581.5	$ 581.5
out of period adjustment	29.5	$ 25.5
Maximum [Member]
Notes Receivable, Short-Term
CHS Capital notes receivable, current, term		12 months
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	$ 187.2	$ 187.2	$ 203.0
Commercial Notes to Notes and Loans Receivable, Net, Percentage	62.00%	62.00%	40.00%
Producer Notes to Notes and Loans Receivable, Net, Percentage	38.00%	38.00%	60.00%

Commercial Notes to Notes and Loans Receivable, Net, Percentage

No definition available.

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Namespace Prefix:	chscp_
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- Definition

Interest Income Accrual, Discontinued, Term

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Notes and Loans Receivable, Current, Term

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	chscp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

out of period adjustment to correct an error related to multiple years that increased bad debt expense for other receivables

+ References

No definition available.

+ Details

Name:	chscp_Outofperiodadjustment
Namespace Prefix:	chscp_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

Producer Notes to Notes and Loans Receivable, Net, Percentage

+ References

No definition available.

+ Details

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Namespace Prefix:	chscp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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Period Type:	duration

- 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://fasb.org/us-gaap/role/ref/legacyRef
-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

+ Details

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- Details

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- Details

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