Segment Reporting Significant Items (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Restructuring and Asset related charges, net		$ 100	$ 70
Significant Items		100	123
Net exchange gains (losses)	[1]	(35)	(61)
Hedging Program [Member]
Segment Reporting Information [Line Items]
Net exchange gains (losses)		16	165
Argentine Peso Devaluation [Member] | Hedging Program [Member]
Segment Reporting Information [Line Items]
Net exchange gains (losses)		(23)	(9)
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Restructuring and Asset related charges, net	[2]	(100)	(70)
Significant Items		(100)	(123)
Net exchange gains (losses)		35	61
Segment Reconciling Items [Member] | La Porte [Member]
Segment Reporting Information [Line Items]
Loss on Divestiture	[3]		(53)
Segment Reconciling Items [Member] | Seed [Member]
Segment Reporting Information [Line Items]
Restructuring and Asset related charges, net	[2]	(21)	(10)
Significant Items		(21)	(10)
Segment Reconciling Items [Member] | Crop Protection [Member]
Segment Reporting Information [Line Items]
Restructuring and Asset related charges, net	[2]	(32)	(18)
Loss on Divestiture		(53)
Significant Items		(32)	(71)
Segment Reconciling Items [Member] | Crop Protection [Member] | La Porte [Member]
Segment Reporting Information [Line Items]
Loss on Divestiture	[3]		(53)
Segment Reconciling Items [Member] | Corporate
Segment Reporting Information [Line Items]
Restructuring and Asset related charges, net	[2]	(47)	(42)
Significant Items		$ (47)	$ (42)

[1] Includes net pre-tax exchange losses of $(23) million and $(9) million associated with the devaluation of the Argentine peso for the three months ended March 31, 2021 and 2020, respectively.

[2] Includes Board approved restructuring plans and asset related charges as well as accelerated prepaid amortization expense. See Note 5 - Restructuring and Asset Related Charges - Net, to the interim Consolidated Financial Statements for additional information.

[3] Includes a loss recorded in other income - net related to the sale of the La Porte site.