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Stockholders' Equity Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Nov. 19, 2024	Sep. 13, 2022	Jun. 01, 2019
Equity, Class of Treasury Stock [Line Items]
Common Stock, Par Value	$ 0.01	$ 0.01	$ 0.01
Repurchase of Common Stock	$ 250	$ 270
2024 Stock Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Share Repurchase Program, Authorized, Amount						$ 3,000
Stock Repurchased and Retired During Period, Shares	3,190,000
Repurchase of Common Stock	$ 250
2022 Stock Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Share Repurchase Program, Authorized, Amount							$ 2,000
Stock Repurchased and Retired During Period, Shares			7,815,000	17,909,000	10,026,000
Repurchase of Common Stock			$ 500	$ 1,000	$ 500
2022 Stock Repurchase Program | Share Repurchase from Pension Plan [Member] | Pension Plan
Equity, Class of Treasury Stock [Line Items]
Repurchase of Common Stock			$ 145	$ 125
Corteva [Member]
Equity, Class of Treasury Stock [Line Items]
Common Stock, Par Value	$ 0.01							$ 0.01

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Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

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