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Derivative Instruments and Hedging Activities (Narrative) (Details) (Designated As Hedging Instrument [Member], USD $) In Millions, unless otherwise specified | 6 Months Ended
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Jun. 30, 2013
Derivative [Line Items] |
After-tax losses in AOCI from commodity cash flow hedge transactions | $ 13
Number of months price risk cash flow hedges gain loss will be recognized in earnings | 12 months
Total after-tax gains deferred in AOCI related to treasury-lock agreements and interest rate swaps | 21
Total after-tax gains deferred in AOCI related to treasury-lock agreements and interest rate swaps that will be recognized in earnings | 21
Number of years in which after-tax gains in AOCI related to treasury-lock agreements and interest rate swaps will be recognized in earnings, low end of range | 10 years
Number of years in which after-tax gains in AOCI related to treasury-lock agreements and interest rate swaps will be recognized in earnings, high end of range | 30 years
Corn [Member] |
Derivative [Line Items] |
Corn processed per month (in bushels) | 76,000,000
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) | 15.00%
Percentage of anticipated commodity purchases or production hedged during historical hedging period, high end of range (as a percent) | 26.00%
Number of months for which hedges for future monthly commodity purchases, sales or production have been made | 12 months
Percentage of anticipated commodity purchases or production hedged over future hedging period, low end of range (as a percent) | 0.10%
Percentage of anticipated commodity purchases or production hedged over future hedging period, high end of range (as a percent) | 24.00%
Natural gas [Member] |
Derivative [Line Items] |
Historical time period of hedge percentages | 12 months
Natural gas used by production facilities per month (in MMbtus) | 3,800,000
Percentage of anticipated commodity purchases or production hedged during historical hedging period, low end of range (as a percent) | 11.00%
Percentage of anticipated commodity purchases or production hedged during historical hedging period, high end of range (as a percent) | 66.00%
Number of months for which hedges for future monthly commodity purchases, sales or production have been made | 6 months
Percentage of anticipated commodity purchases or production hedged over future hedging period, low end of range (as a percent) | 13.00%
Percentage of anticipated commodity purchases or production hedged over future hedging period, high end of range (as a percent) | 20.00%
Ethanol [Member] |
Derivative [Line Items] |
Number of months for which hedges for future monthly commodity purchases, sales or production have been made | 9 months
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) | 1,000,000
Commodity sales volume hedged during historical hedging period, high end of range (in gallons) | 15,000,000
Contracted commodity sales volume hedged over future hedging period, low end of range (in gallons) | 1,000,000
Contracted commodity sales volume hedged over future hedging period, high end of range (in gallons) | 10,000,000
Foreign Currency Exchange [Member] |
Derivative [Line Items] |
Historical time period of hedged amounts | 12 months
Foreign currency expenditures hedged during historical hedging period, low end of range | 12
Foreign currency expenditures hedged during historical hedging period, high end of range | 25
Foreign currency expenditures hedged | 12
Gain on Foreign Exchange Contracts, Cash Flow Hedges, after Tax, Accumulated Other Comprehensive Income | 1
Gain on Foreign Exchange Contracts, Cash Flow Hedges After Tax Reclassification to Earnings | $ 1

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: | duration

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: | duration

X
- Definition Total after-tax gains deferred in AOCI related to treasury-lock agreements and interest rate swaps. + References No definition available. + Details
Name: | adm_DeferredGainLossOnTreasuryLockAgreementsAndInterestRateSwapsCashFlowHedgeAfterTaxAccumulatedOtherComprehensiveIncome
Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Total after-tax gains deferred in AOCI related to treasury-lock agreements and interest rate swaps that will be recognized in earnings. + References No definition available. + Details
Name: | adm_DeferredGainLossOnTreasuryLockAgreementsAndInterestRateSwapsCashFlowHedgeAfterTaxAccumulatedOtherComprehensiveIncomeToBeRecognizedInEarnings
Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 disclosed its historical hedged amounts. + References No definition available. + Details
Name: | adm_DerivativeHedgedItemPastPeriodOfTimeHedgedAmounts
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 Description of treasury lock and interest rate swap transactions that will result in the reclassification into earnings of gains (losses) reported in accumulated other comprehensive income. Includes the time period range over which gains (losses) will be reclassified to earnings (high end of range). + References No definition available. + Details
Name: | adm_DescriptionOfReclassificationOfTreasuryLockAndInterestRateCashFlowHedgeGainLossAccumulatedOtherComprehensiveIncomeHighEndOfRange
Namespace Prefix: | adm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of treasury lock and interest rate swap transactions that will result in the reclassification into earnings of gains (losses) reported in accumulated other comprehensive income. Includes the time period range over which gains (losses) will be reclassified to earnings (low end of range). + References No definition available. + Details
Name: | adm_DescriptionOfReclassificationOfTreasuryLockAndInterestRateCashFlowHedgeGainLossAccumulatedOtherComprehensiveIncomeLowEndOfRange
Namespace Prefix: | adm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of the entities forecasted foreign currency expenditures hedged at the end of the period. + References No definition available. + Details
Name: | adm_ForeignCurrencyExpendituresHedged
Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition High end of the range of the entities forecasted foreign currency expenditures hedged during the historical hedging period. + References No definition available. + Details
Name: | adm_ForeignCurrencyExpendituresHedgedDuringHistoricalHedgingPeriodHighEndOfRange
Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Low end of the range of the entities forecasted foreign currency expenditures hedged during the historical hedging period. + References No definition available. + Details
Name: | adm_ForeignCurrencyExpendituresHedgedDuringHistoricalHedgingPeriodLowEndOfRange
Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of unrealized gain (loss) after tax related to the increase (decrease) in fair value of foreign exchange contracts designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income. + References No definition available. + Details
Name: | adm_GainLossOnForeignExchangeContractsCashFlowHedgesAfterTaxAccumulatedOtherComprehensiveIncome
Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of unrealized gain (loss) after tax related to the increase (decrease) in fair value of foreign exchange contracts designated as cash flow hedging instruments, that will be reclassified from accumulated other comprehensive income into earnings over the life of the hedged transaction. + References No definition available. + Details
Name: | adm_GainLossOnForeignExchangeContractsCashFlowHedgesAfterTaxReclassificationToEarnings
Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This element represents the volume of natural gas used by the entity's production facilities per month under the designated cash flow hedge program. + References No definition available. + Details
Name: | adm_NaturalGasProductionFacilities
Namespace Prefix: | adm_
Data Type: | num:energyItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of months price rish cash flow hedges 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 the 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: | duration

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: | duration

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
- Definition Amount of unrealized gain (loss) after tax related to the increase (decrease) in fair value of price risk derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income. + References No definition available. + Details
Name: | adm_UnrealizedGainLossOnPriceRiskCashFlowHedgesAfterTaxAccumulatedOtherComprehensiveIncome
Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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