Stockholders' Equity Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Feb. 05, 2026	Nov. 19, 2024	Sep. 13, 2022	Aug. 05, 2021	Jun. 03, 2019
Equity, Class of Treasury Stock [Line Items]
Common Stock, Shares, Outstanding, Beginning Balance	685,595,000	701,260,000	713,419,000
Stock Issued During Period, Shares, New Issues	2,701,000	2,244,000	1,965,000
Stock Repurchased and Retired During Period, Shares	16,133,000	17,909,000	14,124,000
Common Stock, Shares, Issued	672,163,000	685,595,000	701,260,000	713,419,000
Common Stock, Shares, Outstanding, Ending Balance	672,163,000	685,595,000	701,260,000	713,419,000
Payments for Repurchase of Common Stock	$ 1,071	$ 1,009	$ 756
Common Stock, Par Value	$ 0.01	$ 0.01				$ 0.01				$ 0.01
2024 Share Buyback Plan
Equity, Class of Treasury Stock [Line Items]
Share Repurchase Program, Authorized, Amount							$ 3,000
Stock Repurchased and Retired During Period, Shares	8,318,000
Payments for Repurchase of Common Stock	$ 571
2022 Share 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
Payments for Repurchase of Common Stock	$ 500	$ 1,000	$ 500
2022 Share Repurchase Program | Share Repurchase from Pension Plan [Member] | Pension Plan
Equity, Class of Treasury Stock [Line Items]
Payments for Repurchase of Common Stock	$ 145	$ 125
2021 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Share Repurchase Program, Authorized, Amount									$ 1,500
Stock Repurchased and Retired During Period, Shares			4,098,000	17,425,000	5,572,000
Payments for Repurchase of Common Stock			$ 250	$ 1,000	$ 250
EIDP
Equity, Class of Treasury Stock [Line Items]
Common Stock, Shares, Outstanding, Beginning Balance	200
Common Stock, Shares, Outstanding, Ending Balance	200	200
Common Stock, Par Value	$ 0.30	$ 0.30				$ 0.30
Corteva [Member]
Equity, Class of Treasury Stock [Line Items]
Common Stock, Shares, Issued	672,163,000	685,595,000
Common Stock, Par Value	$ 0.01