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Derivative Instruments and Hedging Activities (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Sep. 30, 2012
Designated As Hedging Instrument [Member] |
Derivative [Line Items] |
After-tax gains in AOCI from commodity cash flow hedge transactions | $ 58
After-tax gains in AOCI from commodity cash flow hedge transactions expected to be recognized in earnings. | 57
Number of months cash flow hedges gains will be recognized in earnings | 12 months
Total after-tax gains deferred in AOCI related to treasury-lock agreements and interest rate swaps | 22
Total after-tax gains deferred in AOCI related to treasury-lock agreements and interest rate swaps that will be recognized in earnings | 1
Number of months gain on treasury lock agreements and interest rate swaps will be recognized in earnings | 12 months
GrainCorp Limited [Member] | Not Designated As Hedging Instrument [Member] |
Derivative [Line Items] |
Economic interest held by the Company, as a percent | 4.70%
Corn [Member] | Designated As Hedging Instrument [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) | 1.00%
Percentage of anticipated commodity purchases or production hedged during historical hedging period, high end of range (as a percent) | 100.00%
Percentage of anticipated commodity purchases or production hedged over future hedging period, low end of range (as a percent) | 1.00%
Percentage of anticipated commodity purchases or production hedged over future hedging period, high end of range (as a percent) | 20.00%
Number of months for which hedges for future monthly commodity purchases, sales or production have been made | 17 months
Natural gas [Member] | Designated As Hedging Instrument [Member] |
Derivative [Line Items] |
Natural gas used by production facilities per month (in MMbtus) | 3,800,000
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) | 19.00%
Percentage of anticipated commodity purchases or production hedged during historical hedging period, high end of range (as a percent) | 30.00%
Percentage of anticipated commodity purchases or production hedged over future hedging period, low end of range (as a percent) | 8.00%
Percentage of anticipated commodity purchases or production hedged over future hedging period, high end of range (as a percent) | 49.00%
Number of months for which hedges for future monthly commodity purchases, sales or production have been made | 15 months
Ethanol [Member] | Designated As Hedging Instrument [Member] |
Derivative [Line Items] |
Historical time period of hedge volumes | 12 months
Commodity sales volume hedged during historical hedging period, low end of range (in gallons) | 9,000,000
Commodity sales volume hedged during historical hedging period, high end of range (in gallons) | 21,000,000
Contracted commodity sales volume hedged over future hedging period, low end of range (in gallons) | 400,000
Contracted commodity sales volume hedged over future hedging period, high end of range (in gallons) | 11,000,000
Number of months for which hedges for future monthly commodity purchases, sales or production have been made | 4 months
Foreign Currency Exchange [Member] | Designated As Hedging Instrument [Member] |
Derivative [Line Items] |
Historical time period of hedged amounts | 12 months
Foreign currency expenditures hedged during historical hedging period, low end of range | 24
Foreign currency expenditures hedged during historical hedging period, high end of range | 30
Foreign currency expenditures hedged | 25
After-tax losses in AOCI related to foreign exchange contracts designated as cash flow hedging instruments | $ 2

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 Economic interest held by a company in an entity, as a percent. + References No definition available. + Details
Name: | adm_EconomicInterestHeldByCompanyAsPercent
Namespace Prefix: | adm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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 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 Number of months treasury lock and interest rate cash flow hedge gain loss will be reclassified in earnings. + References No definition available. + Details
Name: | adm_NumberOfMonthsTreasuryLockAndInterestRateCashFlowHedgeGainLossWillBeReclassifiedInEarnings
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

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

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- 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=7668309&loc=d3e80748-113994 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_PriceRiskCashFlowHedgeUnrealizedGainLossToBeReclassifiedDuringNext12Months
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant