Segment Information (Segment Information) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Information
Revenues	$ (20,340)	$ (15,126)	$ (62,159)	$ (46,377)
Earnings Before Income Taxes	653	200	2,302	1,127
Ag Services and Oilseeds [Member]
Segment Information
Revenues	(15,689)	(11,527)	(48,967)	(35,347)
Earnings Before Income Taxes	618	436	1,965	1,271
Ag Services [Member]
Segment Information
Revenues	(9,899)	(7,352)	(32,860)	(22,930)
Crushing [Member]
Segment Information
Revenues	(2,842)	(2,317)	(8,411)	(7,035)
Refined Products and Other [Member]
Segment Information
Revenues	(2,948)	(1,858)	(7,696)	(5,382)
Carbohydrate Solutions [Member]
Segment Information
Revenues	(2,866)	(2,064)	(7,909)	(6,394)
Earnings Before Income Taxes	213	246	855	509
Starches and sweeteners [Member]
Segment Information
Revenues	(1,972)	(1,574)	(5,563)	(4,769)
VCP [Member]
Segment Information
Revenues	(894)	(490)	(2,346)	(1,625)
Nutrition [Member]
Segment Information
Revenues	(1,697)	(1,451)	(4,993)	(4,359)
Earnings Before Income Taxes	176	147	531	447
Human Nutrition [Member]
Segment Information
Revenues	(808)	(719)	(2,410)	(2,161)
Animal Nutrition [Member]
Segment Information
Revenues	(889)	(732)	(2,583)	(2,198)
Other [Member]
Segment Information
Revenues	(88)	(84)	(290)	(277)
Earnings Before Income Taxes	(5)	20	10	69
Operating Segments [Member]
Segment Information
Earnings Before Income Taxes	1,000	904	3,250	2,316
Operating Segments [Member] | Ag Services and Oilseeds [Member]
Segment Information
Revenues	(16,410)	(13,415)	(51,148)	(40,196)
Operating Segments [Member] | Carbohydrate Solutions [Member]
Segment Information
Revenues	(3,227)	(2,335)	(9,132)	(7,102)
Operating Segments [Member] | Nutrition [Member]
Segment Information
Revenues	(1,755)	(1,481)	(5,172)	(4,471)
Operating Segments [Member] | Other [Member]
Segment Information
Revenues	(88)	(84)	(290)	(277)
Intersegment Elimination [Member]
Segment Information
Revenues	1,140	2,189	3,583	5,669
Intersegment Elimination [Member] | Ag Services and Oilseeds [Member]
Segment Information
Revenues	721	1,888	2,181	4,849
Intersegment Elimination [Member] | Carbohydrate Solutions [Member]
Segment Information
Revenues	361	271	1,223	708
Intersegment Elimination [Member] | Nutrition [Member]
Segment Information
Revenues	58	30	179	112
Corporate, Non-Segment [Member]
Segment Information
Earnings Before Income Taxes	(347)	(704)	(948)	(1,189)
Other (Income) Expense - Net [Member] | Segment Reconciling Items [Member]
Segment Information
Earnings Before Income Taxes	0	57	22	80
Asset impairment, restructuring, and settlement [Member] | Segment Reconciling Items [Member]
Segment Information
Earnings Before Income Taxes	$ (2)	$ (2)	$ (133)	$ (60)