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Related Parties Transactions with Dow (Details) - Successor [Member] - Dow [Member] - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2018 | Dec. 31, 2017
Related Party Transaction [Line Items] |  |  |
Accounts Receivable, Related Parties, Current | $ 91 | $ 91 | $ 12
Accounts Payable, Related Parties | 117 | 117 | $ 26
Net sales | 73 | 151 |
Cost of goods sold | 63 | 126 |
Purchases | 73 | 180 |
Transfers at Cost | $ 93 | $ 259 |

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