Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Revenue from Contract with Customer [Abstract]
Topic 606	$ 6,628	$ 6,416	$ 19,156	$ 18,904
Topic 815 Revenue	15,707	13,956	46,350	42,809
Revenues	22,335	20,372	65,506	61,713
Operating Segments
Revenue from Contract with Customer [Abstract]
Topic 606	6,513	6,307	18,810	18,570
Topic 815 Revenue	15,707	13,956	46,350	42,809
Revenues	22,220	20,263	65,160	61,379
Other Business
Revenue from Contract with Customer [Abstract]
Topic 606	115	109	346	334
Topic 815 Revenue	0	0	0	0
Revenues	115	109	346	334
Ag Services and Oilseeds \| Operating Segments
Revenue from Contract with Customer [Abstract]
Topic 606	2,335	2,226	6,707	6,431
Topic 815 Revenue	15,110	13,387	44,655	41,126
Revenues	17,445	15,613	51,362	47,557
Carbohydrate Solutions \| Operating Segments
Revenue from Contract with Customer [Abstract]
Topic 606	2,341	2,165	6,559	6,413
Topic 815 Revenue	597	569	1,695	1,683
Revenues	2,938	2,734	8,254	8,096
Nutrition \| Operating Segments
Revenue from Contract with Customer [Abstract]
Topic 606	1,837	1,916	5,544	5,726
Topic 815 Revenue	0	0	0	0
Revenues	1,837	1,916	5,544	5,726
Ag Services \| Ag Services and Oilseeds \| Operating Segments
Revenue from Contract with Customer [Abstract]
Topic 606	1,252	1,221	3,528	3,493
Topic 815 Revenue	9,380	9,055	29,243	28,215
Revenues	10,632	10,276	32,771	31,708
Crushing \| Ag Services and Oilseeds \| Operating Segments
Revenue from Contract with Customer [Abstract]
Topic 606	97	130	367	316
Topic 815 Revenue	3,133	2,450	8,640	7,531
Revenues	3,230	2,580	9,007	7,847
Refined Products and Other \| Ag Services and Oilseeds \| Operating Segments
Revenue from Contract with Customer [Abstract]
Topic 606	986	875	2,812	2,622
Topic 815 Revenue	2,597	1,882	6,772	5,380
Revenues	3,583	2,757	9,584	8,002
Starches and Sweeteners \| Carbohydrate Solutions \| Operating Segments
Revenue from Contract with Customer [Abstract]
Topic 606	1,424	1,436	4,336	4,359
Topic 815 Revenue	597	569	1,695	1,683
Revenues	2,021	2,005	6,031	6,042
Vantage Corn Processors \| Carbohydrate Solutions \| Operating Segments
Revenue from Contract with Customer [Abstract]
Topic 606	917	729	2,223	2,054
Topic 815 Revenue	0	0	0	0
Revenues	917	729	2,223	2,054
Human Nutrition \| Nutrition \| Operating Segments
Revenue from Contract with Customer [Abstract]
Topic 606	1,042	1,067	3,185	3,226
Topic 815 Revenue	0	0	0	0
Revenues	1,042	1,067	3,185	3,226
Animal Nutrition \| Nutrition \| Operating Segments
Revenue from Contract with Customer [Abstract]
Topic 606	795	849	2,359	2,500
Topic 815 Revenue	0	0	0	0
Revenues	$ 795	$ 849	$ 2,359	$ 2,500