Quaterly Financial Data Quarterly Financial Data (Parentheticals) (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Sep. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Loss on Extinguishment of Debt			$ 0	$ 0	$ (13)	[1]
Net after-tax exchange (loss) gain			(88)	(161)	(84)
Hedging Program [Member]
Net after-tax exchange (loss) gain			$ 14	68	(45)
Hedging Program [Member] | Argentine peso devaluation [Member]
Other Tax (Benefit) Expense		$ 33
Merger with Dow [Member]
Business Combination, Fair Value Step-Up Of Acquired Inventory, Amount recognized in Cost of Goods sold					$ 272
Segment Reconciling Items [Member]
Gain (Loss) on Disposition of Assets	[2],[3]			(388)
Crop Protection [Member] | Segment Reconciling Items [Member] | Sale of JV [Member]
Gain (Loss) on Disposition of Assets				$ (53)

[1] The cash flows for the year ended December 31, 2019 includes cash flows of EID's ECP and Specialty Products Entities.

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

[3] The year ended December 31, 2019 is presented on a pro forma basis, prepared in accordance with Article 11 of Regulation S-X that was in effect prior to recent amendments.