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Derivative Instruments and Hedging Activities (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 bu | Dec. 31, 2014
Derivative [Line Items] |  |
Interest Rate Derivative Assets, at Fair Value | $ 33 us-gaap_InterestRateDerivativeAssetsAtFairValue |
Interest Rate Derivative Liabilities, at Fair Value | 0 us-gaap_InterestRateDerivativeLiabilitiesAtFairValue |
Number of months price risk cash flow hedges gain loss will be recognized in earnings | 12 months |
Corn processed per month (in bushels) | 76,000,000 adm_ProcessingOfCornPerMonth |
Designated As Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Interest Rate Derivative Assets, at Fair Value | 33 us-gaap_InterestRateDerivativeAssetsAtFairValue / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember | 21 us-gaap_InterestRateDerivativeAssetsAtFairValue / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
Interest Rate Derivative Liabilities, at Fair Value |  | 0 us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember
After-tax losses in AOCI from commodity cash flow hedge transactions | $ (6)us-gaap_PriceRiskCashFlowHedgeUnrealizedGainLossToBeReclassifiedDuringNext12Months / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember |
Corn [Member] | Designated As Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Historical time period of hedge percentages | 12 months |
Percentage of anticipated commodity purchases or production hedged during historical hedging period, low end of range (as a percent) | 17.00%adm_PercentageofAnticipatedCommodityHedgedDuringHistoricalHedgingPeriodLowEnd / adm_DerivativeByCommodityAxis = adm_CornMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember |
Percentage of anticipated commodity purchases or production hedged during historical hedging period, high end of range (as a percent) | 71.00%adm_PercentageOfAnticipatedCommodityHedgedDuringHistoricalHedgingPeriodHighEnd / adm_DerivativeByCommodityAxis = adm_CornMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember |
Percentage of anticipated commodity purchases or production hedged over future hedging period, low end of range (as a percent) | 1.00%adm_PercentageofAnticipatedCommodityHedgedoverFutureHedgingPeriodLowEnd / adm_DerivativeByCommodityAxis = adm_CornMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember |
Percentage of anticipated commodity purchases or production hedged over future hedging period, high end of range (as a percent) | 38.00%adm_PercentageofAnticipatedCommodityHedgedoverFutureHedgingPeriodHighEnd / adm_DerivativeByCommodityAxis = adm_CornMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember |
Derivative Hedged Item Time Period | 12 months |
Ethanol [Member] | Designated As Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative Hedged Item Past Period of Time Hedged Volumes | 12 months |
Commodity sales volume hedged during historical hedging period, low end of range (in gallons) | 24,000,000 adm_CommodityHedgedDuringHistoricalHedgingPeriodLowEnd / adm_DerivativeByCommodityAxis = adm_EthanolMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember |
Commodity sales volume hedged during historical hedging period, high end of range (in gallons) | 121,000,000 adm_CommodityHedgedDuringHistoricalHedgingPeriodHighEnd / adm_DerivativeByCommodityAxis = adm_EthanolMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember |
Derivative Hedged Item Time Period | 12 months |
Contracted commodity sales volume hedged over future hedging period, low end of range (in gallons) | 0 adm_ContractedCommodityHedgedOverFutureHedgingPeriodLowEnd / adm_DerivativeByCommodityAxis = adm_EthanolMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember |
Contracted commodity sales volume hedged over future hedging period, high end of range (in gallons) | 31,000,000 adm_ContractedCommodityHedgedOverFutureHedgingPeriodHighEnd / adm_DerivativeByCommodityAxis = adm_EthanolMember / us-gaap_HedgingDesignationAxis = us-gaap_DesignatedAsHedgingInstrumentMember |

X
- Definition High end of the range of the entity's contracted commodity sales volumes hedged during the historical hedging period. + References No definition available. + Details
Name: | adm_CommodityHedgedDuringHistoricalHedgingPeriodHighEnd
Namespace Prefix: | adm_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Low end of the range of the entity's contracted commodity sales volumes hedged during the historical hedging period. + References No definition available. + Details
Name: | adm_CommodityHedgedDuringHistoricalHedgingPeriodLowEnd
Namespace Prefix: | adm_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition High end of the range of the contracted sales volume hedged by the company over the future hedging period. + References No definition available. + Details
Name: | adm_ContractedCommodityHedgedOverFutureHedgingPeriodHighEnd
Namespace Prefix: | adm_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

X
- Definition Low end of the range of the contracted sales volume hedged by the company over the future hedging period. + References No definition available. + Details
Name: | adm_ContractedCommodityHedgedOverFutureHedgingPeriodLowEnd
Namespace Prefix: | adm_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

X
- Definition The period of time for which the entity discloses its historical hedging percentages. + References No definition available. + Details
Name: | adm_DerivativeHedgedItemPastPeriodOfTimeHedged
Namespace Prefix: | adm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period of time for which the entity discloses its historical hedging gallons. + References No definition available. + Details
Name: | adm_DerivativeHedgedItemPastPeriodOfTimeHedgedVolumes
Namespace Prefix: | adm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The forward time period for which hedges have been made as of the balance sheet date. + References No definition available. + Details
Name: | adm_DerivativeHedgedItemTimePeriod
Namespace Prefix: | adm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of months price risk cash flow hedges gain loss will be recognized in earnings + References No definition available. + Details
Name: | adm_Numberofmonthspriceriskcashflowhedgesgainlosswillberecognizedinearnings
Namespace Prefix: | adm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition High end of the range of the percentage of the entity's anticipated commodity purchases or production hedged during the historical hedging period. + References No definition available. + Details
Name: | adm_PercentageOfAnticipatedCommodityHedgedDuringHistoricalHedgingPeriodHighEnd
Namespace Prefix: | adm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Low end of the range of the percentage of entity's anticipated commodity purchases or production hedged during the historical hedging period + References No definition available. + Details
Name: | adm_PercentageofAnticipatedCommodityHedgedDuringHistoricalHedgingPeriodLowEnd
Namespace Prefix: | adm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition High end of the range of the percentage of the entity's anticipated commodity purchases or production hedged over the forward hedging period. + References No definition available. + Details
Name: | adm_PercentageofAnticipatedCommodityHedgedoverFutureHedgingPeriodHighEnd
Namespace Prefix: | adm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Low end of the range of the percentage of the entity's anticipated commodity purchases or production hedged over the forward hedging period. + References No definition available. + Details
Name: | adm_PercentageofAnticipatedCommodityHedgedoverFutureHedgingPeriodLowEnd
Namespace Prefix: | adm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition This element represents the quantity of corn processing per month under the designated cash flow hedge program. + References No definition available. + Details
Name: | adm_ProcessingOfCornPerMonth
Namespace Prefix: | adm_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611 + Details
Name: | us-gaap_InterestRateDerivativeAssetsAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611 + Details
Name: | us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The estimated net amount of unrealized gains or losses on price risk cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
Name: | us-gaap_PriceRiskCashFlowHedgeUnrealizedGainLossToBeReclassifiedDuringNext12Months
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | adm_DerivativeByCommodityAxis=adm_CornMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | adm_DerivativeByCommodityAxis=adm_EthanolMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |