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Commitments and Contingencies - Purchase Obligations (Details) - USD ($) $ in Thousands | 12 Months Ended
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Aug. 31, 2016 | Aug. 31, 2015 | Aug. 31, 2014
Unrecorded Unconditional Purchase Obligation [Line Items] |  |  |
Long-term unconditional purchase obligations, minimum amount required | $ 627,200 |  |
Long-term unconditional purchase obligations, period amount purchase | 88,000 | $ 66,800 | $ 65,500
Minimum |  |  |
Unrecorded Unconditional Purchase Obligation [Line Items] |  |  |
Long-term unconditional purchase obligations, Total | 767,943 |  |
Long-term unconditional purchase obligations, Less than 1 Year | 60,655 |  |
Long-term unconditional purchase obligations, 1 - 3 Years | 108,120 |  |
Long-term unconditional purchase obligations, 3 - 5 Years | 113,553 |  |
Long-term unconditional purchase obligations, More than 5 Years | $ 485,615 |  |

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- Definition Unrecorded Unconditional Purchase Obligation, Long-Term, Due Within Four to Five Years + References No definition available. + Details
Name: | chscp_UnrecordedUnconditionalPurchaseObligationLongTermDueWithinFourToFiveYears
Namespace Prefix: | chscp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- 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

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- Definition Unrecorded Unconditional Purchase Obligation, Minimum Amount Required + References No definition available. + Details
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Namespace Prefix: | chscp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- 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. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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=73718637&loc=d3e25336-109308 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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 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=73718637&loc=d3e25336-109308 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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=73718637&loc=d3e25336-109308 + Details
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Period Type: | instant

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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. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount purchased during the period under an unrecorded unconditional purchase obligation (for example, under the take-or-pay or throughput contract). + 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 (d) -URI http://asc.fasb.org/extlink&oid=73718637&loc=d3e25336-109308 + Details
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Balance Type: | debit
Period Type: | duration

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- Details
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