Revenues (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 22,926	$ 16,281	$ 41,819	$ 31,251
Contract with Customer, Liability [Abstract]
Contract with Customer, Liability	357		357		$ 626
Change in Contract with Customer, Liability [Abstract]
Contract with Customer, Liability, Revenue Recognized	287	339	569	621
Ag Services and Oilseeds [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	18,271	12,741	33,278	23,820
Ag Services [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	12,815	8,652	22,961	15,578
Crushing [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	2,827	2,405	5,569	4,718
Refined Products and Other [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	2,629	1,684	4,748	3,524
Carbohydrate Solutions [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	2,820	2,014	5,043	4,330
Starches and sweeteners [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,846	1,545	3,591	3,195
VCP [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	974	469	1,452	1,135
Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,733	1,437	3,296	2,908
Human Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	848	723	1,602	1,442
Animal Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	885	714	1,694	1,466
Other [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	102	89	202	193
Non MTM Products and Services [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	5,962	4,836	10,866	9,983
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	5,811	4,730	10,611	9,760
Non MTM Products and Services [Member] | Transferred over Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	151	106	255	223
Non MTM Products and Services [Member] | Ag Services and Oilseeds [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,704	1,704	3,106	3,370
Non MTM Products and Services [Member] | Ag Services and Oilseeds [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,553	1,598	2,851	3,147
Non MTM Products and Services [Member] | Ag Services and Oilseeds [Member] | Transferred over Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	151	106	255	223
Non MTM Products and Services [Member] | Ag Services [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	953	983	1,719	1,951
Non MTM Products and Services [Member] | Ag Services [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	802	877	1,464	1,728
Non MTM Products and Services [Member] | Ag Services [Member] | Transferred over Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	151	106	255	223
Non MTM Products and Services [Member] | Crushing [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	92	200	216	380
Non MTM Products and Services [Member] | Crushing [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	92	200	216	380
Non MTM Products and Services [Member] | Refined Products and Other [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	659	521	1,171	1,039
Non MTM Products and Services [Member] | Refined Products and Other [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	659	521	1,171	1,039
Non MTM Products and Services [Member] | Carbohydrate Solutions [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	2,423	1,606	4,262	3,512
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	2,423	1,606	4,262	3,512
Non MTM Products and Services [Member] | Starches and sweeteners [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,449	1,137	2,810	2,377
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	1,449	1,137	2,810	2,377
Non MTM Products and Services [Member] | VCP [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	974	469	1,452	1,135
Non MTM Products and Services [Member] | VCP [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	974	469	1,452	1,135
Non MTM Products and Services [Member] | Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,733	1,437	3,296	2,908
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	1,733	1,437	3,296	2,908
Non MTM Products and Services [Member] | Human Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	848	723	1,602	1,442
Non MTM Products and Services [Member] | Human Nutrition [Member] | Transferred at Point in Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	848	723	1,602	1,442
Non MTM Products and Services [Member] | Animal Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	885	714	1,694	1,466
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	885	714	1,694	1,466
Non MTM Products and Services [Member] | Other [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	102	89	202	193
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	102	89	202	193
Mark-to-Market Products [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	16,964	11,445	30,953	21,268
Mark-to-Market Products [Member] | Ag Services and Oilseeds [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	16,567	11,037	30,172	20,450
Mark-to-Market Products [Member] | Ag Services [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	11,862	7,669	21,242	13,627
Mark-to-Market Products [Member] | Crushing [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	2,735	2,205	5,353	4,338
Mark-to-Market Products [Member] | Refined Products and Other [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,970	1,163	3,577	2,485
Mark-to-Market Products [Member] | Carbohydrate Solutions [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	397	408	781	818
Mark-to-Market Products [Member] | Starches and sweeteners [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 397	$ 408	$ 781	$ 818