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Fair Value Measurements (Narrative) (Details) (Weighted Average [Member], Fair Value, Measurements, Recurring [Member], Significant Unobservable Inputs (Level 3) [Member]) | Mar. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Inventory Related Payables [Member] |  |
Fair Value Measurements [Line Items] |  |
Basis | 22.10% | 13.20%
Inventories Carried At Market [Member] |  |
Fair Value Measurements [Line Items] |  |
Basis | 20.30% | 21.90%

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- Definition Adjustment to current market value, based on location, that a market participant is willing to pay, used as an input to measure fair value. + References No definition available. + Details
Name: | adm_Basis
Namespace Prefix: | adm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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