Segment Information (Segment Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Segment Information
Sales to external customers	$ 21,727	$ 21,155
Intersegment sales	2,300	2,031
Net sales	21,727	21,155
Interest income	27	26
Equity in earnings of affiliates	137	115
Operating profit	375	568
Investments in and advances to affiliates	3,252		3,170
Identifiable assets	43,226		45,136
Reportable segment totals [Member]
Segment Information
Operating profit	630	918
Oilseeds Processing
Segment Information
Sales to external customers	8,143	7,715
Intersegment sales	569	548
Net sales	8,712	8,263
Operating profit	313	542
Corn Processing [Member]
Segment Information
Sales to external customers	3,053	2,835
Intersegment sales	34	33
Net sales	3,087	2,868
Operating profit	153	133
Agricultural Services [Member]
Segment Information
Sales to external customers	10,500	10,571
Intersegment sales	1,641	1,410
Net sales	12,141	11,981
Operating profit	151	261
Other [Member]
Segment Information
Sales to external customers	31	34
Intersegment sales	56	40
Net sales	87	74
Operating profit	13	(18)
Intersegment Elimination [Member]
Segment Information
Net sales	(2,300)	(2,031)
Corporate [Member]
Segment Information
Operating profit	$ (255)	$ (350)