Supplementary Information Foreign Currency Exchange Gain (Loss) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Foreign Currency Exchange Gain (Loss) [Line Items]
Net exchange gains (losses)	[1]	$ (181)	$ (284)	$ (397)
Tax benefits (expenses) on exchange (loss) gain		3	37	62
Net after-tax exchange (loss) gain		(178)	(247)	(335)
Noncontrolling Interest [Member]
Foreign Currency Exchange Gain (Loss) [Line Items]
Net after-tax exchange (loss) gain		0	1	0
Corteva [Member]
Foreign Currency Exchange Gain (Loss) [Line Items]
Net after-tax exchange (loss) gain		(178)	(246)	(335)
Subsidiary Monetary Position
Foreign Currency Exchange Gain (Loss) [Line Items]
Net exchange gains (losses)		(254)	(152)	(371)
Tax benefits (expenses) on exchange (loss) gain		11	11	55
Net after-tax exchange (loss) gain		(243)	(141)	(316)
Hedging Program [Member]
Foreign Currency Exchange Gain (Loss) [Line Items]
Net exchange gains (losses)		73	(132)	(26)
Tax benefits (expenses) on exchange (loss) gain		(8)	26	7
Net after-tax exchange (loss) gain		$ 65	$ (106)	$ (19)

[1] Includes net pre-tax exchange gains (losses) of $(34) million, $(66) million and $(284) million, associated with impacts from the devaluation of the Argentine peso for the years ended December 31, 2025, 2024 and 2023, respectively.