Commitments and Contingencies Unconditional Purchase Obligations (Details) (USD $)	May 31, 2014
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligation	$ 503,960,000
Unrecorded Unconditional Purchase Obligation, Long-Term, Due in Next Twelve Months	62,769,000
Unrecorded Unconditional Purchase Obligation, Long-Term, Due Within Two to Three Years	130,048,000
Unrecorded Unconditional Purchase Obligation, Long-Term, Due Within Four to Five Years	91,324,000
Unrecorded Unconditional Purchase Obligation, Long-Term, Due after Five Years	219,819,000
Minimum [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligation, Long-Term	$ 428,400,000

Minimum future payments required under long-term unconditional purchase obligations, discounted to present value.

No definition available.

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Namespace Prefix:	chscp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Unrecorded Unconditional Purchase Obligation, Long-Term, Due Within Four to Five Years

+ References

No definition available.

+ Details

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Namespace Prefix:	chscp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Unrecorded Unconditional Purchase Obligation, Long-Term, Due Within Two to Three Years

+ References

No definition available.

+ Details

Name:	chscp_UnrecordedUnconditionalPurchaseObligationLongTermDueWithinTwoToThreeYears
Namespace Prefix:	chscp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the next fiscal year following the latest fiscal year.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 440

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing after the fifth fiscal year following the latest fiscal year.

+ References

+ Details

Name:	us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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