Receivables - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
May 31, 2020	Aug. 31, 2019
Notes Receivable, Long-Term
CHS Capital long-term notes receivable additional available credit of counterparty	$ 762.2
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	$ 93.6	$ 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%

Commercial Notes to Notes and Loans Receivable, Net, Percentage

No definition available.

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

- Definition

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

+ References

No definition available.

+ Details

Name:	chscp_NotesAndLoansReceivablesNetNoncurrentRemainingBorrowingCapacityOfCounterparty
Namespace Prefix:	chscp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

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

- Definition

Producer Notes to Notes and Loans Receivable, Net, Percentage

+ References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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

- Definition

Amount, after allowance for credit loss, of financing receivable, classified as noncurrent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_NotesAndLoansReceivableNetNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=chscp_CHSCapitalNotesReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: