Revenues (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 16,297	$ 17,068	$ 31,601	$ 32,594
Contract with Customer, Liability [Abstract]
Contract with Customer, Liability	367		367		$ 501
Change in Contract with Customer, Liability [Abstract]
Contract with Customer, Liability, Revenue Recognized	160	183	326	509
Carbohydrate Solutions [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	2,441	2,647	4,844	5,248
Starches and sweeteners [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,684	1,704	3,306	3,342
Bioproducts [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	757	943	1,538	1,906
Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,524	1,018	2,806	1,968
Wild Flavors and Specialty Ingredients [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	728	693	1,402	1,329
Animal Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	796	325	1,404	639
Oilseeds [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	5,747	6,662	11,161	12,264
Crushing and origination [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	3,613	4,374	6,869	7,659
Refining, packaging, biodiesel, and other [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	2,134	2,288	4,292	4,605
Origination [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	6,481	6,640	12,605	12,907
Merchandising and handling [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	6,418	6,577	12,476	12,789
Transportation [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	63	63	129	118
Other [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	104	101	185	207
Non MTM Products and Services [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	5,307	4,739	9,779	9,416
Non MTM Products and Services [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	5,179	4,616	9,536	9,176
Non MTM Products and Services [Member] | Transferred over Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	128	123	243	240
Non MTM Products and Services [Member] | Carbohydrate Solutions [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	2,017	2,224	3,997	4,344
Non MTM Products and Services [Member] | Carbohydrate Solutions [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	2,017	2,224	3,997	4,344
Non MTM Products and Services [Member] | Starches and sweeteners [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,260	1,281	2,459	2,438
Non MTM Products and Services [Member] | Starches and sweeteners [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,260	1,281	2,459	2,438
Non MTM Products and Services [Member] | Bioproducts [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	757	943	1,538	1,906
Non MTM Products and Services [Member] | Bioproducts [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	757	943	1,538	1,906
Non MTM Products and Services [Member] | Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,524	1,018	2,806	1,968
Non MTM Products and Services [Member] | Nutrition [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,524	1,018	2,806	1,968
Non MTM Products and Services [Member] | Wild Flavors and Specialty Ingredients [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	728	693	1,402	1,329
Non MTM Products and Services [Member] | Wild Flavors and Specialty Ingredients [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	728	693	1,402	1,329
Non MTM Products and Services [Member] | Animal Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	796	325	1,404	639
Non MTM Products and Services [Member] | Animal Nutrition [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	796	325	1,404	639
Non MTM Products and Services [Member] | Oilseeds [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	725	712	1,408	1,425
Non MTM Products and Services [Member] | Oilseeds [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	725	712	1,408	1,425
Non MTM Products and Services [Member] | Crushing and origination [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	200	131	371	317
Non MTM Products and Services [Member] | Crushing and origination [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	200	131	371	317
Non MTM Products and Services [Member] | Refining, packaging, biodiesel, and other [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	525	581	1,037	1,108
Non MTM Products and Services [Member] | Refining, packaging, biodiesel, and other [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	525	581	1,037	1,108
Non MTM Products and Services [Member] | Origination [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	937	684	1,383	1,472
Non MTM Products and Services [Member] | Origination [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	809	561	1,140	1,232
Non MTM Products and Services [Member] | Origination [Member] | Transferred over Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	128	123	243	240
Non MTM Products and Services [Member] | Merchandising and handling [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	874	621	1,254	1,354
Non MTM Products and Services [Member] | Merchandising and handling [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	809	561	1,140	1,232
Non MTM Products and Services [Member] | Merchandising and handling [Member] | Transferred over Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	65	60	114	122
Non MTM Products and Services [Member] | Transportation [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	63	63	129	118
Non MTM Products and Services [Member] | Transportation [Member] | Transferred over Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	63	63	129	118
Non MTM Products and Services [Member] | Other [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	104	101	185	207
Non MTM Products and Services [Member] | Other [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	104	101	185	207
Mark-to-Market Products [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	10,990	12,329	21,822	23,178
Mark-to-Market Products [Member] | Carbohydrate Solutions [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	424	423	847	904
Mark-to-Market Products [Member] | Starches and sweeteners [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	424	423	847	904
Mark-to-Market Products [Member] | Oilseeds [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	5,022	5,950	9,753	10,839
Mark-to-Market Products [Member] | Crushing and origination [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	3,413	4,243	6,498	7,342
Mark-to-Market Products [Member] | Refining, packaging, biodiesel, and other [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,609	1,707	3,255	3,497
Mark-to-Market Products [Member] | Origination [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	5,544	5,956	11,222	11,435
Mark-to-Market Products [Member] | Merchandising and handling [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 5,544	$ 5,956	$ 11,222	$ 11,435