Revenues (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 20,340	$ 15,126	$ 62,159	$ 46,377
Contract with Customer, Liability [Abstract]
Contract with Customer, Liability	374		374		$ 626
Change in Contract with Customer, Liability [Abstract]
Contract with Customer Liability Revenue Recognized with Opening Balance	128	121	697	742
Ag Services and Oilseeds [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	15,689	11,527	48,967	35,347
Ag Services [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	9,899	7,352	32,860	22,930
Crushing [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	2,842	2,317	8,411	7,035
Refined Products and Other [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	2,948	1,858	7,696	5,382
Carbohydrate Solutions [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	2,866	2,064	7,909	6,394
Starches and sweeteners [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,972	1,574	5,563	4,769
VCP [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	894	490	2,346	1,625
Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,697	1,451	4,993	4,359
Human Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	808	719	2,410	2,161
Animal Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	889	732	2,583	2,198
Other [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	88	84	290	277
Non MTM Products and Services [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	5,740	4,625	16,606	14,608
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	5,587	4,538	16,198	14,298
Non MTM Products and Services [Member] | Transferred over Time [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	153	87	408	310
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	1,545	1,438	4,651	4,808
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	1,392	1,351	4,243	4,498
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	153	87	408	310
Non MTM Products and Services [Member] | Ag Services [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	769	863	2,488	2,814
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	616	776	2,080	2,504
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	153	87	408	310
Non MTM Products and Services [Member] | Crushing [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	119	113	335	493
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	119	113	335	493
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	657	462	1,828	1,501
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	657	462	1,828	1,501
Non MTM Products and Services [Member] | Carbohydrate Solutions [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	2,410	1,652	6,672	5,164
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	2,410	1,652	6,672	5,164
Non MTM Products and Services [Member] | Starches and sweeteners [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,516	1,162	4,326	3,539
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	1,516	1,162	4,326	3,539
Non MTM Products and Services [Member] | VCP [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	894	490	2,346	1,625
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	894	490	2,346	1,625
Non MTM Products and Services [Member] | Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	1,697	1,451	4,993	4,359
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	1,697	1,451	4,993	4,359
Non MTM Products and Services [Member] | Human Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	808	719	2,410	2,161
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	808	719	2,410	2,161
Non MTM Products and Services [Member] | Animal Nutrition [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	889	732	2,583	2,198
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	889	732	2,583	2,198
Non MTM Products and Services [Member] | Other [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	88	84	290	277
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	88	84	290	277
Mark-to-Market Products [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	14,600	10,501	45,553	31,769
Mark-to-Market Products [Member] | Ag Services and Oilseeds [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	14,144	10,089	44,316	30,539
Mark-to-Market Products [Member] | Ag Services [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	9,130	6,489	30,372	20,116
Mark-to-Market Products [Member] | Crushing [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	2,723	2,204	8,076	6,542
Mark-to-Market Products [Member] | Refined Products and Other [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	2,291	1,396	5,868	3,881
Mark-to-Market Products [Member] | Carbohydrate Solutions [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	456	412	1,237	1,230
Mark-to-Market Products [Member] | Starches and sweeteners [Member]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 456	$ 412	$ 1,237	$ 1,230