Segment and Geographic Information (Segment Information) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Information
Property, Plant and Equipment, Additions									$ 1,350	$ 1,357
Revenues	$ 16,445	$ 16,565	$ 17,186	$ 17,506	$ 20,894	$ 18,117	$ 21,494	$ 20,696	67,702	81,201	$ 89,804
Depreciation									799	850	827
Asset abandonments and write-downs									108	35	84
Interest income									71	92	102
Equity in earnings of affiliates									390	372	411
Interest Expense									(308)	(337)	(413)
Income Tax Expense (Benefit)									(438)	(877)	(670)
Net Income (Loss) Attributable to Noncontrolling Interest									3	(5)	(12)
Net Income (Loss) Attributable to Parent	718	$ 252	$ 386	$ 493	701	$ 747	$ 533	$ 267	1,849	2,248	1,342
Operating profit									2,284	3,130	2,024
Investments in and advances to affiliates	3,901				3,892				3,901	3,892
Identifiable assets	40,157				43,997				40,157	43,997
Reportable segment totals [Member]
Segment Information
Operating profit									3,272	3,915	2,708
Oilseeds Processing
Segment Information
Property, Plant and Equipment, Additions									404	268
Revenues									25,217	30,933	34,238
Depreciation									187	235	233
Asset abandonments and write-downs									40	3	4
Interest income									29	30	36
Equity in earnings of affiliates									251	236	261
Operating profit									1,574	1,440	1,285
Investments in and advances to affiliates	2,743				2,596				2,743	2,596
Identifiable assets	10,794				12,712				10,794	12,712
Crushing and origination [Member]
Segment Information
Revenues									15,597	18,542	20,522
Refining, packaging, biodiesel, and other [Member]
Segment Information
Revenues									6,801	8,498	9,730
Cocoa and other [Member]
Segment Information
Revenues									2,563	3,439	3,281
Asia [Member]
Segment Information
Revenues									256	454	705
Wild and Specialty Ingredients [Member]
Segment Information
Property, Plant and Equipment, Additions									167	570
Revenues									2,407	1,368	1,062
Depreciation									36	37	7
Asset abandonments and write-downs									1	0	0
Interest income									1	1	0
Operating profit									280	205	267
Identifiable assets	4,570				3,468				4,570	3,468
Corn Processing [Member]
Segment Information
Property, Plant and Equipment, Additions									427	273
Revenues									9,995	12,282	13,770
Depreciation									335	332	334
Asset abandonments and write-downs									66	15	62
Interest income									2	10	3
Equity in earnings of affiliates									85	113	98
Operating profit									648	1,148	773
Investments in and advances to affiliates	368				426				368	426
Identifiable assets	6,450				6,384				6,450	6,384
Sweeteners and starches [Member]
Segment Information
Revenues									3,713	3,767	4,726
Bioproducts [Member]
Segment Information
Revenues									6,282	8,515	9,044
Agricultural Services [Member]
Segment Information
Property, Plant and Equipment, Additions									229	177
Revenues									29,682	36,288	40,432
Depreciation									188	189	208
Asset abandonments and write-downs									0	17	3
Interest income									16	31	47
Equity in earnings of affiliates									24	41	64
Operating profit									714	1,043	342
Investments in and advances to affiliates	384				460				384	460
Identifiable assets	8,715				10,250				8,715	10,250
Merchandising and handling [Member]
Segment Information
Revenues									25,957	32,208	36,162
Transportation [Member]
Segment Information
Revenues									246	265	228
Milling and other [Member]
Segment Information
Revenues									3,479	3,815	4,042
Other Segments [Member]
Segment Information
Property, Plant and Equipment, Additions									15	1
Revenues									401	330	302
Depreciation									5	3	5
Interest income									19	13	12
Equity in earnings of affiliates									(3)	10	1
Operating profit									56	79	41
Investments in and advances to affiliates	39				33				39	33
Identifiable assets	7,902				7,910				7,902	7,910
Financial [Member]
Segment Information
Revenues									401	330	302
Corporate [Member]
Segment Information
Property, Plant and Equipment, Additions									108	68
Depreciation									48	54	40
Asset abandonments and write-downs									1	0	15
Interest income									4	7	4
Equity in earnings of affiliates									33	(28)	(13)
Operating profit									(988)	(785)	(684)
Investments in and advances to affiliates	367				377				367	377
Identifiable assets	$ 1,726				$ 3,273				1,726	3,273
Gross Revenues [Member] | Oilseeds Processing
Segment Information
Revenues									29,393	33,591	37,835
Gross Revenues [Member] | Corn Processing [Member]
Segment Information
Revenues									10,051	12,377	13,904
Gross Revenues [Member] | Agricultural Services [Member]
Segment Information
Revenues									33,658	40,120	45,917
Gross Revenues [Member] | Other Segments [Member]
Segment Information
Revenues									634	573	515
Operating Segments [Member] | Wild and Specialty Ingredients [Member]
Segment Information
Revenues									2,423	1,380	1,072
Intersegment Eliminations [Member]
Segment Information
Revenues									(8,457)	(6,840)	(9,439)
Intersegment Eliminations [Member] | Oilseeds Processing
Segment Information
Revenues									(4,176)	(2,658)	(3,597)
Intersegment Eliminations [Member] | Wild and Specialty Ingredients [Member]
Segment Information
Revenues									(16)	(12)	(10)
Intersegment Eliminations [Member] | Corn Processing [Member]
Segment Information
Revenues									(56)	(95)	(134)
Intersegment Eliminations [Member] | Agricultural Services [Member]
Segment Information
Revenues									(3,976)	(3,832)	(5,485)
Intersegment Eliminations [Member] | Other Segments [Member]
Segment Information
Revenues									$ (233)	$ (243)	$ (213)