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Stockholders' Equity Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 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	$ 0.01	$ 0.01
Repurchase of Common Stock			$ 500	$ 520
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	3,095,000	280,000	6,285,000	280,000
Repurchase of Common Stock	$ 250	$ 20	$ 500	$ 20
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							$ 0.01