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Stockholders' Equity Common Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020	Aug. 05, 2021	Jul. 30, 2021	Dec. 31, 2020	Jun. 26, 2019
Class of Stock [Line Items]
Common Stock, Par Value	$ 0.01	$ 0.01	$ 0.01		$ 0.01	$ 0.01
Stock Repurchase Program, Authorized Amount				$ 1,500			$ 1,000
Repurchase of Common Stock	$ 200	$ 550	$ 50
Corteva [Member]
Class of Stock [Line Items]
Common Stock, Par Value	$ 0.01	$ 0.01		$ 0.01
Stock Repurchased and Retired During Period, Shares	4,324	11,970	1,865

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