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Stockholders' Equity Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | 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 |  |  | $ 770 | $ 757 |  |  |  |
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 | 3,401,000 |  | 3,681,000 |  |  |  |  |
Repurchase of Common Stock | $ 250 |  | $ 270 |  |  |  |  |
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 |  | 4,722,000 | 7,815,000 | 13,838,000 |  |  |  |
Repurchase of Common Stock |  | $ 250 | $ 500 | $ 750 |  |  |  |
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

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