Revenue Disaggregation of Revenue - Products (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net Sales	$ 15,655	$ 14,217	$ 13,846
Seed [Member]
Disaggregation of Revenue [Line Items]
Net Sales	8,402	7,756	7,590
Seed [Member] | Corn [Member]
Disaggregation of Revenue [Line Items]
Net Sales	5,618	5,182	5,126
Seed [Member] | Soybean [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,568	1,445	1,387
Seed [Member] | Other oilseeds [Member]
Disaggregation of Revenue [Line Items]
Net Sales	752	619	593
Seed [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net Sales	464	510	484
Crop Protection [Member]
Disaggregation of Revenue [Line Items]
Net Sales	7,253	6,461	6,256
Crop Protection [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Net Sales	398	385	326
Crop Protection [Member] | Herbicides [Member]
Disaggregation of Revenue [Line Items]
Net Sales	3,815	3,280	3,206
Crop Protection [Member] | Insecticides [Member]
Disaggregation of Revenue [Line Items]
Net Sales	1,730	1,764	1,652
Crop Protection [Member] | Fungicides [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 1,310	$ 1,032	$ 1,072