Segment and Geographic Information (Segment Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended										6 Months Ended		12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Jun. 30, 2011
Segment Information
Revenues	$ 24,143	$ 21,393	$ 22,541	$ 21,727	$ 24,921	$ 21,808	$ 22,675	$ 21,155	$ 23,306	$ 21,902	$ 46,729	$ 45,208	$ 89,804	$ 90,559	$ 89,038	$ 80,676
Depreciation											396	391	827	798	793	827
Asset abandonments and write-downs											0	337	84	30	367	2
Interest income											59	62	102	109	112	136
Equity in earnings of affiliates											255	251	411	476	472	542
Operating profit											997	781	2,024	1,981	1,765	3,015
Investments in and advances to affiliates	3,340				3,170						3,170		3,340	3,170
Identifiable assets	43,752				45,136						45,136		43,752	45,136
Gross additions to property, plant, and equipment											641		947
Reportable segment totals [Member]
Segment Information
Operating profit											1,306	1,063	2,708	2,768	2,525	4,131
Oilseeds Processing
Segment Information
Revenues											18,052	17,337	34,883	35,430	34,715	29,908
Depreciation											113	108	237	233	228	215
Asset abandonments and write-downs											0	0	4	1	1	2
Interest income											18	16	36	37	35	28
Equity in earnings of affiliates											96	129	261	193	226	213
Operating profit											747	429	1,473	1,620	1,302	1,690
Investments in and advances to affiliates	2,120				1,889						1,889		2,120	1,889
Identifiable assets	15,408				15,856						15,856		15,408	15,856
Gross additions to property, plant, and equipment											259		302
Corn Processing [Member]
Segment Information
Revenues											6,167	6,451	13,139	11,830	12,114	9,908
Depreciation											165	178	325	332	345	399
Asset abandonments and write-downs											0	337	62	23	360	0
Interest income											1		3	2	1
Equity in earnings of affiliates											49	53	98	103	107	83
Operating profit											71	54	814	278	261	1,079
Investments in and advances to affiliates	431				505						505		431	505
Identifiable assets	6,558				6,649						6,649		6,558	6,649
Gross additions to property, plant, and equipment											169		317
Agricultural Services [Member]
Segment Information
Revenues											22,441	21,364	41,480	43,159	42,082	40,750
Depreciation											99	90	220	197	188	183
Asset abandonments and write-downs											0	0	3	2	2	0
Interest income											18	10	47	30	22	23
Equity in earnings of affiliates											49	55	64	104	110	230
Operating profit											395	563	380	779	947	1,323
Investments in and advances to affiliates	302				297						297		302	297
Identifiable assets	12,358				14,201						14,201		12,358	14,201
Gross additions to property, plant, and equipment											182		239
Other Segments [Member]
Segment Information
Revenues											69	56	302	140	127	110
Depreciation											2	2	5	4	4	5
Interest income											11	14	12	18	21	46
Equity in earnings of affiliates													1			9
Operating profit											93	17	41	91	15	39
Investments in and advances to affiliates	24				18						18		24	18
Identifiable assets	6,408				5,912						5,912		6,408	5,912
Gross additions to property, plant, and equipment													1
Corporate [Member]
Segment Information
Depreciation											17	13	40	32	28	25
Asset abandonments and write-downs											0	0	15	4	4	0
Interest income											11	22	4	22	33	39
Equity in earnings of affiliates											61	14	(13)	76	29	7
Operating profit											(309)	(282)	(684)	(787)	(760)	(1,116)
Investments in and advances to affiliates	463				461						461		463	461
Identifiable assets	3,020				2,518						2,518		3,020	2,518
Gross additions to property, plant, and equipment											31		88
Gross Revenues [Member] | Oilseeds Processing
Segment Information
Revenues											19,465	18,073	38,490	38,382	36,990	32,011
Gross Revenues [Member] | Corn Processing [Member]
Segment Information
Revenues											6,223	6,564	13,299	11,946	12,287	10,102
Gross Revenues [Member] | Agricultural Services [Member]
Segment Information
Revenues											25,487	24,115	46,950	49,063	47,691	45,167
Gross Revenues [Member] | Other Segments [Member]
Segment Information
Revenues											151	136	515	303	288	265
Intersegment Eliminations [Member]
Segment Information
Revenues											(4,597)	(3,680)	(9,450)	(9,135)	(8,218)	(6,869)
Intersegment Eliminations [Member] | Oilseeds Processing
Segment Information
Revenues											(1,413)	(736)	(3,607)	(2,952)	(2,275)	(2,103)
Intersegment Eliminations [Member] | Corn Processing [Member]
Segment Information
Revenues											(56)	(113)	(160)	(116)	(173)	(194)
Intersegment Eliminations [Member] | Agricultural Services [Member]
Segment Information
Revenues											(3,046)	(2,751)	(5,470)	(5,904)	(5,609)	(4,417)
Intersegment Eliminations [Member] | Other Segments [Member]
Segment Information
Revenues											$ (82)	$ (80)	$ (213)	$ (163)	$ (161)	$ (155)