Revenue Disaggregation of Revenue - Geography (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Net Sales		$ 2,371	$ 1,863	$ 12,176	$ 11,010
Seed [Member]
Disaggregation of Revenue [Line Items]
Net Sales		738	523	7,010	6,516
Seed [Member] | North America
Disaggregation of Revenue [Line Items]
Net Sales	[1]	168	97	4,482	4,290
Seed [Member] | EMEA
Disaggregation of Revenue [Line Items]
Net Sales	[2]	153	117	1,398	1,262
Seed [Member] | Latin America
Disaggregation of Revenue [Line Items]
Net Sales		334	246	842	668
Seed [Member] | Asia Pacific
Disaggregation of Revenue [Line Items]
Net Sales		83	63	288	296
Crop Protection [Member]
Disaggregation of Revenue [Line Items]
Net Sales		1,633	1,340	5,166	4,494
Crop Protection [Member] | North America
Disaggregation of Revenue [Line Items]
Net Sales	[1]	422	390	1,693	1,528
Crop Protection [Member] | EMEA
Disaggregation of Revenue [Line Items]
Net Sales	[2]	237	198	1,304	1,163
Crop Protection [Member] | Latin America
Disaggregation of Revenue [Line Items]
Net Sales		763	559	1,361	1,086
Crop Protection [Member] | Asia Pacific
Disaggregation of Revenue [Line Items]
Net Sales		$ 211	$ 193	$ 808	$ 717

[1] Represents U.S. & Canada.

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