Segment Information (Segment Information) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Information
Revenues	$ (22,926)	$ (16,281)	$ (41,819)	$ (31,251)
Earnings Before Income Taxes	825	552	1,649	927
Ag Services and Oilseeds [Member]
Segment Information
Revenues	(18,271)	(12,741)	(33,278)	(23,820)
Earnings Before Income Taxes	570	413	1,347	835
Ag Services [Member]
Segment Information
Revenues	(12,815)	(8,652)	(22,961)	(15,578)
Crushing [Member]
Segment Information
Revenues	(2,827)	(2,405)	(5,569)	(4,718)
Refined Products and Other [Member]
Segment Information
Revenues	(2,629)	(1,684)	(4,748)	(3,524)
Carbohydrate Solutions [Member]
Segment Information
Revenues	(2,820)	(2,014)	(5,043)	(4,330)
Earnings Before Income Taxes	383	195	642	263
Starches and sweeteners [Member]
Segment Information
Revenues	(1,846)	(1,545)	(3,591)	(3,195)
VCP [Member]
Segment Information
Revenues	(974)	(469)	(1,452)	(1,135)
Nutrition [Member]
Segment Information
Revenues	(1,733)	(1,437)	(3,296)	(2,908)
Earnings Before Income Taxes	201	158	355	300
Human Nutrition [Member]
Segment Information
Revenues	(848)	(723)	(1,602)	(1,442)
Animal Nutrition [Member]
Segment Information
Revenues	(885)	(714)	(1,694)	(1,466)
Other [Member]
Segment Information
Revenues	(102)	(89)	(202)	(193)
Earnings Before Income Taxes	6	38	15	49
Operating Segments [Member]
Segment Information
Earnings Before Income Taxes	1,145	813	2,250	1,412
Operating Segments [Member] | Ag Services and Oilseeds [Member]
Segment Information
Revenues	(18,799)	(14,431)	(34,738)	(26,781)
Operating Segments [Member] | Carbohydrate Solutions [Member]
Segment Information
Revenues	(3,271)	(2,213)	(5,905)	(4,767)
Operating Segments [Member] | Nutrition [Member]
Segment Information
Revenues	(1,793)	(1,474)	(3,417)	(2,990)
Operating Segments [Member] | Other [Member]
Segment Information
Revenues	(102)	(89)	(202)	(193)
Intersegment Elimination [Member]
Segment Information
Revenues	1,039	1,926	2,443	3,480
Intersegment Elimination [Member] | Ag Services and Oilseeds [Member]
Segment Information
Revenues	528	1,690	1,460	2,961
Intersegment Elimination [Member] | Carbohydrate Solutions [Member]
Segment Information
Revenues	451	199	862	437
Intersegment Elimination [Member] | Nutrition [Member]
Segment Information
Revenues	60	37	121	82
Corporate, Non-Segment [Member]
Segment Information
Earnings Before Income Taxes	(320)	(261)	(601)	(485)
Other (Income) Expense - Net [Member] | Segment Reconciling Items [Member]
Segment Information
Earnings Before Income Taxes	22	23	22	23
Asset impairment, restructuring, and settlement [Member] | Segment Reconciling Items [Member]
Segment Information
Earnings Before Income Taxes	$ (37)	$ (14)	$ (131)	$ (58)