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Business Combinations (Schedule of Fair Value of Consideration Transferred) (Details) $ / shares in Units, $ in Millions | Aug. 31, 2017 USD ($) $ / shares shares
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Business Acquisition [Line Items] |  |
Business Combination, Consideration Transferred | $ | $ 74,680 |
E I DuPont de Nemours & Co [Member] | Common Stock [Member] |  |
Business Acquisition [Line Items] |  |
Common Stock, Shares, Outstanding | shares | 868,300,000 |
DowDuPont [Member] |  |
Business Acquisition [Line Items] |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | $ | $ 485 | [1]
DowDuPont [Member] | Common Stock [Member] |  |
Business Acquisition [Line Items] |  |
Stock Issued During Period, Shares, New Issues | shares | 1,113,200,000 |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | $ | $ 74,195 | [2]
Common Stock [Member] | Dow [Member] |  |
Business Acquisition [Line Items] |  |
Share Price | $ / shares | $ 66.65 |
Merger with Dow [Domain] | Equity and Incentive Plan [Member] | Common Stock [Member] |  |
Business Acquisition [Line Items] |  |
DuPont to DowDuPont share exchange ratio | shares | 1.2820 |
[1] | Represents the fair value of replacement awards issued for DuPont's equity awards outstanding immediately before the Merger and attributable to the service periods prior to the Merger. The previous DuPont equity awards were converted into the right to receive 1.2820 shares of DowDuPont Common Stock.
[2] | Amount was determined based on the price per share of Dow Common Stock of $66.65 on August 31, 2017.

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