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Stockholders' Equity Common Stock (Details) $ / shares in Units, $ in Millions | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 USD ($) | [1] | Feb. 04, 2021 $ / shares | Jun. 26, 2019 USD ($) $ / shares | Jun. 03, 2019 $ / shares shares | Jun. 01, 2019 shares | Nov. 02, 2017 USD ($)
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Common Stock, Shares Authorized | 1,666,667,000 | 1,666,667,000 |  |  |  |  |  |  |
Common Stock, Par Value | $ / shares | $ 0.01 | $ 0.01 |  |  | $ 0.01 |  |  |  |
Common Stock, Shares, Outstanding | 743,458,000 | 748,577,000 |  |  |  |  |  | 748,815,000 |
Stock Issued During Period, Shares, New Issues | 3,384,000 | 586,000 |  |  |  |  |  |  |
Stock Repurchased and Retired During Period, Shares | (8,503,000) | (824,000) |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount | $ |  |  |  |  |  | $ 1,000 |  |  | $ 4,000
Payments for Repurchase of Common Stock | $ | $ 275 | $ 25 | [1] | $ 0 |  |  |  |  |
Payments for Repurchase of Common Stock | $ | $ 275 | $ 25 | [1] | $ 0 |  |  |  |  |
Corteva [Member] |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Common Stock, Shares Authorized |  |  |  |  |  |  | 748,815,000 |  |
Common Stock, Par Value | $ / shares |  |  |  |  |  | $ 0.01 | $ 0.01 |  |
Common Stock, Shares, Issued |  |  |  |  |  |  |  | 748,815,000 |
Corteva [Member] | Shares of Corteva Stock [Member] |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Exchange Ratio |  |  |  |  |  |  |  | 1 |
Corteva [Member] | Shares of DowDuPont Common Stock Held [Member] |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Exchange Ratio |  |  |  |  |  |  |  | 3 |
Corteva [Member] |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Stock Repurchased and Retired During Period, Shares | 8,503,000 | 824,000 |  |  |  |  |  |  |
Common Stock, Shares, Issued |  |  |  |  |  |  |  | 748,815,000 |
[1] | The cash flows for the years ended December 31, 2018 and 2019 includes cash flows of EID's ECP and Specialty Products Entities.

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