Revenue Disaggregation of Revenue - Geography (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Net Sales		$ 4,178	$ 3,956
Seed [Member]
Disaggregation of Revenue [Line Items]
Net Sales		2,492	2,455
Seed [Member] | North America
Disaggregation of Revenue [Line Items]
Net Sales	[1]	1,210	1,290
Seed [Member] | EMEA
Disaggregation of Revenue [Line Items]
Net Sales	[2]	947	881
Seed [Member] | Latin America
Disaggregation of Revenue [Line Items]
Net Sales		274	216
Seed [Member] | Asia Pacific
Disaggregation of Revenue [Line Items]
Net Sales		61	68
Crop Protection [Member]
Disaggregation of Revenue [Line Items]
Net Sales		1,686	1,501
Crop Protection [Member] | North America
Disaggregation of Revenue [Line Items]
Net Sales	[1]	533	475
Crop Protection [Member] | EMEA
Disaggregation of Revenue [Line Items]
Net Sales	[2]	655	586
Crop Protection [Member] | Latin America
Disaggregation of Revenue [Line Items]
Net Sales		244	218
Crop Protection [Member] | Asia Pacific
Disaggregation of Revenue [Line Items]
Net Sales		$ 254	$ 222

[1] Represents U.S. & Canada.

[2] Europe, Middle East, and Africa ("EMEA").