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Divestitures and Other Transactions (Narrative) (Details) - USD ($) $ in Millions |  | 3 Months Ended | 8 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Nov. 01, 2017 | Mar. 31, 2017 | Sep. 30, 2016 | Aug. 31, 2017 | Sep. 30, 2016 | Sep. 30, 2017
PFOA Matters [Member] |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Period for sharing for PFOA Liabilities |  | 5 years |  |  |  |
Indemnification assets |  |  |  |  |  | $ 15
Accounts and Notes Receivable [Member] |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Indemnification assets |  |  |  |  |  | 96
Other Assets |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Indemnification assets |  |  |  |  |  | $ 342
Predecessor |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Separation related transaction costs |  |  | $ 10 |  | $ 30 |
Predecessor | Food Safety Diagnostic Business [Member] |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Pre-tax Gain on Disposal |  |  |  | $ 162 |  |
Gain on Disposal, Net of tax |  |  |  | 86 |  |
Predecessor | Ownership interest in DuPont (Shenzhen) Manufacturing Limited [Member] |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Ownership interest in an entity |  |  |  |  | 100.00% |
Gain on sale of entity |  |  |  |  | $ 369 |
Gain on sale of entity, after-tax |  |  |  |  | $ 214 |
Discontinued Operations [Member] | Predecessor | PFOA Matters: Multi-District Litigation [Member] |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Other Tax Expense (Benefit) |  |  |  | (10) |  |
Loss Contingency, Loss in Period |  |  |  | 335 |  |
Loss Related to litigation Settlement, Net of Tax |  |  |  | $ 214 |  |
Subsequent Event [Member] | DuPont Remedy [Member] |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Preliminary Fair Value | $ 1,900 |  |  |  |  |
Cash consideration payment | $ 1,200 |  |  |  |  |

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