Segment Reporting Significant Items (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019		Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Restructuring and Asset related charges, net		$ 49	$ 46		$ 298	$ 167
Integration and Separation Costs		0	152		0	694
Loss on Extinguishment of Debt		0	0		0	(13)	[1]
Significant Items		49	246		351	886
Net exchange gains (losses)	[2]	(67)	(11)		(127)	(70)
Hedging Program [Member]
Segment Reporting Information [Line Items]
Net exchange gains (losses)		(6)	55		173	(11)
Argentine Peso Devaluation [Member] | Hedging Program [Member]
Segment Reporting Information [Line Items]
Net exchange gains (losses)		(26)	(33)		(56)	(42)
Corporate | Argentine Peso Devaluation [Member] | Hedging Program [Member]
Segment Reporting Information [Line Items]
Net exchange gains (losses)						33
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Restructuring and Asset related charges, net	[3]	(49)	(46)		(298)	(167)	[4]
Integration and Separation Costs	[5]		(152)			(582)	[4]
Loss on Divestiture	[4],[6]					(24)
Amortization of inventory step up included in COGS	[7]		(15)			(67)	[4]
Loss on Extinguishment of Debt	[4],[8]					(13)
Significant Items		(49)	(246)		(351)	(886)
Net exchange gains (losses)		67	(22)	[9]	127	37	[9]
Argentine peso devaluation	[10]		(33)			(33)	[4]
Segment Reconciling Items [Member] | La Porte [Member]
Segment Reporting Information [Line Items]
Loss on Divestiture	[11]				(53)
Segment Reconciling Items [Member] | Seed [Member]
Segment Reporting Information [Line Items]
Restructuring and Asset related charges, net	[3]	(9)	(47)		(154)	(123)	[4]
Integration and Separation Costs			0			0
Amortization of inventory step up included in COGS	[7]		(15)			(67)	[4]
Significant Items		(9)	(62)		(154)	(214)
Argentine peso devaluation						0
Segment Reconciling Items [Member] | Seed [Member] | La Porte [Member]
Segment Reporting Information [Line Items]
Loss on Divestiture					0
Segment Reconciling Items [Member] | Seed [Member] | Sale of JV [Member]
Segment Reporting Information [Line Items]
Loss on Divestiture	[4],[6]					(24)
Segment Reconciling Items [Member] | Crop Protection [Member]
Segment Reporting Information [Line Items]
Restructuring and Asset related charges, net	[3]	(40)	1		(98)	(24)	[4]
Integration and Separation Costs			0			0
Loss on Divestiture					(53)
Amortization of inventory step up included in COGS						0
Significant Items		(40)	1		(151)	(24)
Argentine peso devaluation						0
Segment Reconciling Items [Member] | Crop Protection [Member] | La Porte [Member]
Segment Reporting Information [Line Items]
Loss on Divestiture	[11]				(53)
Segment Reconciling Items [Member] | Crop Protection [Member] | Sale of JV [Member]
Segment Reporting Information [Line Items]
Loss on Divestiture						0
Segment Reconciling Items [Member] | Corporate
Segment Reporting Information [Line Items]
Restructuring and Asset related charges, net	[3]	0	0		(46)	(20)	[4]
Integration and Separation Costs	[5]		(152)			(582)	[4]
Amortization of inventory step up included in COGS						0
Loss on Extinguishment of Debt	[4],[8]					(13)
Significant Items		$ 0	(185)		(46)	(648)
Argentine peso devaluation	[10]		$ (33)			(33)	[4]
Segment Reconciling Items [Member] | Corporate | La Porte [Member]
Segment Reporting Information [Line Items]
Loss on Divestiture					$ 0
Segment Reconciling Items [Member] | Corporate | Sale of JV [Member]
Segment Reporting Information [Line Items]
Loss on Divestiture						$ 0

[1] The cash flows for the nine months ended September 30, 2019 includes cash flows of EID's ECP and Specialty Products Entities.

[2] Includes net pre-tax exchange losses of $(26) million and $(56) million for the three and nine months ended September 30, 2020, respectively, and $(33) million and $(42) million for the three and nine months ended September 30, 2019, respectively, associated with the devaluation of the Argentine peso.

[3] 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, for additional information.

[4] The nine months ended September 30, 2019 is presented on a pro forma basis, prepared in accordance with Article 11 of Regulation S-X.

[5] Integration and separation costs include costs incurred to prepare for and close the Merger, post-Merger integration expenses, and costs incurred to prepare for the Internal Reorganizations.

[6] Includes a loss recorded in other income - net related to DAS’s sale of a joint venture related to synergy actions.

[7] Includes a charge related to the amortization of the inventory that was stepped up to fair value in connection with the Merger.

[8] Includes a loss on early extinguishment of debt related to the difference between the redemption price and the par value of the Make Whole Notes and Term Loan Facility, partially offset by the write-off of unamortized step-up related to the fair value step-up of EID's debt.

[9] Excludes a $(33) million foreign exchange loss for the three and nine months ended September 30, 2019 associated with the devaluation of the Argentine peso, as it is included within significant items. See Note 7 - Supplementary Information for additional information

[10] Includes a charge included in other income (expense) - net associated with remeasuring the company’s Argentine Peso net monetary assets, resulting from an unexpected August primary election result in Argentina. Throughout the three months ended September 30, 2019, the Argentine Peso dropped approximately a third of its value against the US dollar and in September of 2019, the country’s central bank announced new restrictions on foreign currency transactions.

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