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Divestitures and Other Transactions (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Mar. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Separation related transaction costs |  | $ 13 |  | $ 20 |
PFOA Matters: Multi-District Litigation [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Indemnification assets | $ 320 |  | $ 320 |  | $ 335
Loss Contingency, Loss in Period |  |  | 335 |  |
Loss Contingency, Loss in Period, after tax |  |  | 214 |  |
Discontinued Operations [Member] | 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 Contingency, Loss in Period, after tax |  |  | 214 |  |
Accounts and Notes Receivable [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Indemnification assets | 412 |  | 412 |  |
Other Assets [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Indemnification assets | $ 343 |  | 343 |  |
Food Safety Diagnostic Business [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal |  |  | 162 |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Net of tax |  |  | $ 86 |  |
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 |

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