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Quaterly Financial Data Quarterly Financial Data (Parentheticals) (Details) - USD ($) $ in Millions | 1 Months Ended | 2 Months Ended | 3 Months Ended | 4 Months Ended | 8 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2017 | Aug. 31, 2017 | Dec. 31, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Aug. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Predecessor [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Effect of Fourth Quarter Events [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Transaction Costs |  |  |  | $ (201) | $ (170) | $ (164) | $ (122) | $ (76) | $ (24) |  | $ 581 | $ 386 | $ 10
Predecessor [Member] | Continuing Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Effect of Fourth Quarter Events [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Tax benefit related to reduction in company's unrecognized tax benefits |  |  |  |  | 53 |  |  |  |  |  | 53 |  |
Pre tax benefit on associated accrued interest reversals |  |  |  |  | $ 47 |  |  |  |  |  |  |  |
Predecessor [Member] | Food Safety Diagnostic Business [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Effect of Fourth Quarter Events [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Pre-tax gain on disposal |  |  |  |  |  |  |  |  |  |  | $ 162 |  |
Predecessor [Member] | Ownership interest in DuPont (Shenzhen) Manufacturing Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Effect of Fourth Quarter Events [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of entity |  |  |  |  |  |  |  |  |  |  |  | $ 369 |
Predecessor [Member] | Merger with Dow [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Effect of Fourth Quarter Events [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Transaction Costs |  | $ (210) |  |  |  |  |  |  |  |  |  |  |
Successor [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Effect of Fourth Quarter Events [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Fair Value Step-Up Of Acquired Inventory | $ (360) |  | $ (1,109) |  |  |  |  |  |  | $ (1,469) |  |  |
Transaction Costs | $ (71) |  | $ (243) |  |  |  |  |  |  | 314 |  |  |
Successor [Member] | Tax benefit due to Tax Cuts and Jobs Act and an internal entity restructuring [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Effect of Fourth Quarter Events [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Benefit |  |  |  |  |  |  |  |  |  | 2,262 |  |  |
Successor [Member] | Merger with Dow [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Effect of Fourth Quarter Events [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Fair Value Step-Up Of Acquired Inventory |  |  |  |  |  |  |  |  |  | $ (1,434) |  |  |

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- Definition Integration and separation costs includes costs incurred to prepare for and close the Merger, post-Merger integration expenses and costs incurred to prepare for the Intended Business Separations. These costs primarily consist of financial advisory, information technology, legal, accounting, consulting and other professional advisory fees associated with preparation and execution of these activities. + References No definition available. + Details
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