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Derivative Financial Instruments and Hedging Activities Purchase and Sale Contracts (Details) (Not Designated as Hedging Instrument [Member], Forward Contracts [Member]) | Feb. 28, 2015 Bushels | Aug. 31, 2014 Bushels
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Grain and oilseed - bushels | Long [Member] |  |
Purchase and Sales Contracts [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 716,952,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_GrainandoilseedcontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | 665,690,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_GrainandoilseedcontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember
Grain and oilseed - bushels | Short [Member] |  |
Purchase and Sales Contracts [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 1,380,157,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_GrainandoilseedcontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | 938,140,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_GrainandoilseedcontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember
Ocean and barge freight - tons | Long [Member] |  |
Purchase and Sales Contracts [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 5,006,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitsbargeandfreightMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | 5,423,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitsbargeandfreightMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember
Ocean and barge freight - tons | Short [Member] |  |
Purchase and Sales Contracts [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 3,308,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitsbargeandfreightMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | 4,005,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitsbargeandfreightMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember
Livestock - pounds | Long [Member] |  |
Purchase and Sales Contracts [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 21,320,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitslivestockMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitslivestockMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember
Livestock - pounds | Short [Member] |  |
Purchase and Sales Contracts [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 200,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitslivestockMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | 46,280,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitslivestockMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember
Energy products [Member] | Long [Member] |  |
Purchase and Sales Contracts [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 57,686,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_EnergyproductsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | 27,754,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_EnergyproductsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember
Energy products [Member] | Short [Member] |  |
Purchase and Sales Contracts [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 55,030,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_EnergyproductsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | 50,450,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_EnergyproductsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember
Soy product contracts [Member] | Long [Member] |  |
Purchase and Sales Contracts [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 4,192,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_SoyproductcontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | 37,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_SoyproductcontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember
Soy product contracts [Member] | Short [Member] |  |
Purchase and Sales Contracts [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 3,660,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_SoyproductcontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | 1,212,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_SoyproductcontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember
Derivative number of units Crop nutrients contracts [Member] | Long [Member] |  |
Purchase and Sales Contracts [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 134,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitsCropnutrientscontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | 1,613,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitsCropnutrientscontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember
Derivative number of units Crop nutrients contracts [Member] | Short [Member] |  |
Purchase and Sales Contracts [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 3,091,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitsCropnutrientscontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | 1,607,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitsCropnutrientscontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember
Derivative number of units cargo and freight rail contracts [Member] | Long [Member] |  |
Purchase and Sales Contracts [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 202,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitscargoandfreightrailcontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember | 321,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitscargoandfreightrailcontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_LongMember
Derivative number of units cargo and freight rail contracts [Member] | Short [Member] |  |
Purchase and Sales Contracts [Line Items] |  |
Derivative, Nonmonetary Notional Amount | 117,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitscargoandfreightrailcontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember | 186,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = chscp_DerivativenumberofunitscargoandfreightrailcontractsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForwardContractsMember / us-gaap_HedgingDesignationAxis = us-gaap_NondesignatedMember / us-gaap_PositionAxis = us-gaap_ShortMember

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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration