Segment Information (Narratives) (Details)	6 Months Ended
Dec. 31, 2011
Segment Information
Number of reportable segments	3

This element represents the number of reportable segments of the entity.

No definition available.

Name:	adm_ReportableSegmentsNumber
Namespace Prefix:	adm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration