Segment And Geographic Information (Segment Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Segment Reporting Information [Line Items]
Sales to external customers									$ 89,038	$ 80,676	$ 61,682
Intersegment sales									8,218	6,869	4,024
Net sales	22,675	21,155	23,306	21,902	22,870	20,077	20,930	16,799	89,038	80,676	61,682
Depreciation									793	827	857
Asset abandonments and write-downs									367	2	9
Interest income									112	136	126
Equity in earnings of affiliates									472	542	561
Operating profit									1,765	3,015	2,585
Investments in and advances to affiliates	3,388				3,240				3,388	3,240
Identifiable assets	41,553				42,193				41,553	42,193
Gross additions to property, plant, and equipment									1,719	1,512
Reportable segment totals [Member]
Segment Reporting Information [Line Items]
Operating profit									2,525	4,131	3,337
Oilseeds Processing [Member]
Segment Reporting Information [Line Items]
Sales to external customers									34,715	29,908	24,412
Intersegment sales									2,275	2,103	1,334
Net sales									36,990	32,011	25,746
Depreciation									228	215	243
Asset abandonments and write-downs									1	2	9
Interest income									35	28	34
Equity in earnings of affiliates									226	213	306
Operating profit									1,302	1,690	1,551
Investments in and advances to affiliates	1,811				1,648				1,811	1,648
Identifiable assets	17,041				16,576				17,041	16,576
Gross additions to property, plant, and equipment									588	673
Corn Processing [Member]
Segment Reporting Information [Line Items]
Sales to external customers									12,114	9,908	7,874
Intersegment sales									173	194	103
Net sales									12,287	10,102	7,977
Depreciation									345	399	412
Asset abandonments and write-downs									360
Interest income									1		1
Equity in earnings of affiliates									107	83	78
Operating profit									261	1,079	738
Investments in and advances to affiliates	470				483				470	483
Identifiable assets	6,491				7,606				6,491	7,606
Gross additions to property, plant, and equipment									349	349
Agricultural Services [Member]
Segment Reporting Information [Line Items]
Sales to external customers									42,082	40,750	29,301
Intersegment sales									5,609	4,417	2,436
Net sales									47,691	45,167	31,737
Depreciation									188	183	167
Asset abandonments and write-downs									2
Interest income									22	23	18
Equity in earnings of affiliates									110	230	152
Operating profit									947	1,323	1,002
Investments in and advances to affiliates	671				669				671	669
Identifiable assets	11,444				11,242				11,444	11,242
Gross additions to property, plant, and equipment									740	442
Other [Member]
Segment Reporting Information [Line Items]
Sales to external customers									127	110	95
Intersegment sales									161	155	151
Net sales									288	265	246
Depreciation									4	5	6
Interest income									21	46	51
Equity in earnings of affiliates										9	9
Operating profit									15	39	46
Investments in and advances to affiliates	46				22				46	22
Identifiable assets	5,028				6,010				5,028	6,010
Gross additions to property, plant, and equipment									1	8
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales									(8,218)	(6,869)	(4,024)
Corporate [Member]
Segment Reporting Information [Line Items]
Depreciation									28	25	29
Asset abandonments and write-downs									4
Interest income									33	39	22
Equity in earnings of affiliates									29	7	16
Operating profit									(760)	(1,116)	(752)
Investments in and advances to affiliates	390				418				390	418
Identifiable assets	1,549				759				1,549	759
Gross additions to property, plant, and equipment									$ 41	$ 40