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Summary of Significant Accounting Policies - Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Nov. 30, 2014 Refineries	Nov. 30, 2013
Finite-Lived Intangible Assets [Line Items]
Number of Refineries	2chscp_NumberOfRefineries
Expenditures for Major Repairs	$ 1,088chscp_ExpendituresForMajorRepairs	$ 0chscp_ExpendituresForMajorRepairs
Capitalized Maintenance Expense, Deferred During the Period	$ 1,100chscp_CapitalizedMaintenanceExpenseDeferredDuringPeriod	$ 0chscp_CapitalizedMaintenanceExpenseDeferredDuringPeriod
Minimum [Member] | Major Maintenance Activities Requiring Shutdown [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	2 years
Maximum [Member] | Major Maintenance Activities Requiring Shutdown [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	4 years

X

- Definition

Capitalized Maintenance Expense, Deferred During the Period

+ References

No definition available.

+ Details

Name:	chscp_CapitalizedMaintenanceExpenseDeferredDuringPeriod
Namespace Prefix:	chscp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Payments for planned major maintenance at refineries to overhaul, repair, inspect and replace process materials and equipment.

+ References

No definition available.

+ Details

Name:	chscp_ExpendituresForMajorRepairs
Namespace Prefix:	chscp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Number of Refineries

+ References

No definition available.

+ Details

Name:	chscp_NumberOfRefineries
Namespace Prefix:	chscp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

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

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: