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Fair Value Measurements (Unobservable Inputs In Level 3 Valuations Of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (Weighted Average [Member], Significant Unobservable Inputs (Level 3) [Member], Fair Value, Measurements, Recurring [Member]) | Mar. 31, 2015 | Dec. 31, 2014
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Inventory Related Payables [Member] |  |
Unobservable inputs in Level 3 Valuations of Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items] |  |
Basis | 40.10%adm_Basis / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByLiabilityClassAxis = adm_InventoryRelatedPayablesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | 43.40%adm_Basis / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByLiabilityClassAxis = adm_InventoryRelatedPayablesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Transportation cost | 2.20%adm_Freight / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByLiabilityClassAxis = adm_InventoryRelatedPayablesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | 15.20%adm_Freight / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByLiabilityClassAxis = adm_InventoryRelatedPayablesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Commodity Derivative Contracts Losses [Member] |  |
Unobservable inputs in Level 3 Valuations of Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items] |  |
Basis | 20.80%adm_Basis / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByLiabilityClassAxis = adm_CommodityDerivativeContractsLossesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | 13.60%adm_Basis / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByLiabilityClassAxis = adm_CommodityDerivativeContractsLossesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Transportation cost | 16.40%adm_Freight / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByLiabilityClassAxis = adm_CommodityDerivativeContractsLossesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | 19.50%adm_Freight / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByLiabilityClassAxis = adm_CommodityDerivativeContractsLossesMember / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Inventories Carried At Market [Member] |  |
Unobservable inputs in Level 3 Valuations of Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items] |  |
Basis | 18.10%adm_Basis / us-gaap_FairValueByAssetClassAxis = adm_InventoriesCarriedAtMarketMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | 23.40%adm_Basis / us-gaap_FairValueByAssetClassAxis = adm_InventoriesCarriedAtMarketMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Transportation cost | 3.00%adm_Freight / us-gaap_FairValueByAssetClassAxis = adm_InventoriesCarriedAtMarketMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | 4.90%adm_Freight / us-gaap_FairValueByAssetClassAxis = adm_InventoriesCarriedAtMarketMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Commodity Derivative Contracts Gains [Member] |  |
Unobservable inputs in Level 3 Valuations of Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items] |  |
Basis | 22.40%adm_Basis / us-gaap_FairValueByAssetClassAxis = adm_CommodityDerivativeContractsGainsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | 13.50%adm_Basis / us-gaap_FairValueByAssetClassAxis = adm_CommodityDerivativeContractsGainsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Transportation cost | 3.80%adm_Freight / us-gaap_FairValueByAssetClassAxis = adm_CommodityDerivativeContractsGainsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | 10.20%adm_Freight / us-gaap_FairValueByAssetClassAxis = adm_CommodityDerivativeContractsGainsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember

X
- Definition Adjustment to current market value, based on location, that a market participant is willing to pay, used as an input to measure fair value. + References No definition available. + Details
Name: | adm_Basis
Namespace Prefix: | adm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Transportation costs, used as an input to measure fair value. + References No definition available. + Details
Name: | adm_Freight
Namespace Prefix: | adm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | adm_UnobservableInputsInLevel3ValuationsOfAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisLineItems
Namespace Prefix: | adm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration