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Supplementary Information Supplementary Information (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 4 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2017 | Nov. 02, 2017 | Dec. 31, 2016
Successor [Member] |  |  |  |
Restricted Cash | $ 558 | $ 558 |  |
Accrued and other current liabilities | 4,384 | 4,384 |  |
Deferred Revenue | 2,014 | 2,014 |  |
Compensation and other employee-related costs | 857 | 857 |  |
Other noncurrent obligations | 1,975 | 1,975 |  |
Accrued benefit costs | 7,787 | 7,787 |  |
Stock Repurchase Program, Authorized Amount |  |  | $ 4,000 |
Distributions to DowDuPont | 829 | (829) |  |
Successor [Member] | DowDuPont [Member] |  |  |  |
Accounts Payable, Related Parties | 354 | 354 |  |
Successor [Member] | Other Current Assets [Member] |  |  |  |
Restricted Cash | $ 558 | $ 558 |  |
Predecessor [Member] |  |  |  |
Accrued and other current liabilities |  |  |  | $ 4,650
Deferred Revenue |  |  |  | 2,217
Compensation and other employee-related costs |  |  |  | 807
Other noncurrent obligations |  |  |  | 12,304
Predecessor [Member] | Pension Plan |  |  |  |
Accrued benefit costs |  |  |  | 8,092
Predecessor [Member] | Other Post Employment Benefits Plan |  |  |  |
Accrued benefit costs |  |  |  | $ 2,554

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