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Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Income Taxes [Line Items] |  |
Effective income tax rate | 28.60%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 26.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Brazilian Federal Revenue Service [Member] |  |
Income Taxes [Line Items] |  |
Number of separate tax assessments | 3 adm_IncomeTaxExaminationNumberofTaxAssessments / us-gaap_IncomeTaxAuthorityAxis = adm_BrazilianFederalRevenueServiceMember |
Estimated Tax Assessment Including Penalties and Interest | 415 adm_EstimatedTaxAssessmentIncludingPenaltiesandInterest / us-gaap_IncomeTaxAuthorityAxis = adm_BrazilianFederalRevenueServiceMember |
Estimated Additional Tax Assessment | 48 adm_EstimatedAdditionalTaxAssessment / us-gaap_IncomeTaxAuthorityAxis = adm_BrazilianFederalRevenueServiceMember |
Argentine Tax Authorities [Member] |  |
Income Taxes [Line Items] |  |
Estimated Additional Tax Assessment | 329 adm_EstimatedAdditionalTaxAssessment / us-gaap_IncomeTaxAuthorityAxis = adm_ArgentineTaxAuthoritiesMember |
Estimated Tax Assessment Including Interest | 93 adm_EstimatedTaxAssessmentIncludingInterest / us-gaap_IncomeTaxAuthorityAxis = adm_ArgentineTaxAuthoritiesMember |

X
- Definition The element represents the amount of additional income tax expense that could be received in all tax years for which an audit has not yet been initiated and are still open for assessment. + References No definition available. + Details
Name: | adm_EstimatedAdditionalTaxAssessment
Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The sum of estimated tax associated with tax deductibility callenge in a foreign jusrisdiction relating to prior years. + References No definition available. + Details
Name: | adm_EstimatedTaxAssessmentIncludingInterest
Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The sum of estimated tax, penalties and interest associated with tax deductibility challenge in a foreign jurisdiction relating to prior years. + References No definition available. + Details
Name: | adm_EstimatedTaxAssessmentIncludingPenaltiesandInterest
Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Represents the number of separate tax assessments received. + References No definition available. + Details
Name: | adm_IncomeTaxExaminationNumberofTaxAssessments
Namespace Prefix: | adm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
Name: | us-gaap_EffectiveIncomeTaxRateContinuingOperations
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=adm_ArgentineTaxAuthoritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=adm_BrazilianFederalRevenueServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |