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Divestitures and Other Transactions Divestitures and Other Transactions - PChem Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2017 | Jun. 30, 2018
Predecessor [Member] | 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 Benefit | $ 10 |  |
Loss Related to Litigation Settlement |  | $ 335 |
Loss Related To Litigation Settlement, Net Of Tax |  | $ 214 |
Accounts and Notes Receivable, Net [Member] |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Indemnification Assets |  |  | $ 87
Other Assets [Member] |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Indemnification Assets |  |  | 324
Accrued and Other Current Liabilities [Member] |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Indemnification Liabilities |  |  | 87
Other noncurrent obligations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Indemnification Liabilities |  |  | $ 324

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