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Stockholders' Equity Reconciliation of Common Stock Share Activity (Details) - shares | 4 Months Ended | 8 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2017 | Aug. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Predecessor [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Common Stock, Shares, Outstanding, Beginning Balance |  | 868,338,000 | 950,044,000 | 958,388,000 | 992,020,000
Shares Issued During Period |  | 0 | 5,335,000 | 4,808,000 | 5,932,000
Shares Repurchased and Retired During Period |  |  |  | (13,152,000) | (39,564,000)
Shares Retired During the Period |  |  | (87,041,000) |  |
Common Stock, Shares, Outstanding, Ending Balance |  |  | 868,338,000 | 950,044,000 | 958,388,000
Treasury Stock Shares, Beginning of Period |  | 0 | (87,041,000) | (87,041,000) | (87,041,000)
Treasury Stock Shares Repurchased During Period |  |  |  | (13,152,000) | (39,564,000)
Treasury Stock Shares Retired During Period |  |  | 87,041,000 | 13,152,000 | 39,564,000
Treasury Stock Shares, End of Period |  |  | 0 | (87,041,000) | (87,041,000)
Successor [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Common Stock, Shares, Outstanding, Beginning Balance | [1] | 100 |  |  |
Common Stock, Shares, Outstanding, Ending Balance | [1] | 100 | 100 |  |
Treasury Stock Shares, Beginning of Period |  | 0 |  |  |
Treasury Stock Shares, End of Period |  | 0 | 0 |  |
[1] | All of the company's issued and outstanding common stock at September 1, 2017 is held by the DowDuPont Inc.

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