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Derivative Financial Instruments and Hedging Activities Pretax Gains (Losses) On Derivatives Not Accounted For As Hedging Instruments (Details) (Not Designated as Hedging Instrument [Member], USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Nov. 30, 2014 | Nov. 30, 2013
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | $ 6,438 us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet | $ (20,212)us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
Commodity and Freight Derivatives [Member] | Cost of goods sold |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | 3,998 us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet / us-gaap_DerivativeInstrumentRiskAxis = chscp_CommodityAndFreightDerivativesMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember | (19,789)us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet / us-gaap_DerivativeInstrumentRiskAxis = chscp_CommodityAndFreightDerivativesMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember
Foreign Exchange Contract [Member] | Cost of goods sold |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | 2,411 us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember | (422)us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember
Interest rate derivatives | Interest, net |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | $ 29 us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestExpenseMember | $ (1)us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateContractMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestExpenseMember

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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