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Leases (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 | Dec. 31, 2012 | Jun. 30, 2012 | Jun. 30, 2011
Leases [Abstract] |  |  |  |  |  |
Rent expense | $ 106 | $ 103 | $ 199 | $ 212 | $ 209 | $ 251
Time charters | $ 62 | $ 76 | $ 147 | $ 150 | $ 164 | $ 176

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- Definition Time charter rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expenses, net of related sublease income. + References No definition available. + Details
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Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
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