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Restructuring and Asset Related Charges DowDuPont Cost Synergy Program (Details) - Successor [Member] - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 4 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2017 | [1] | Dec. 31, 2017 | Dec. 31, 2017 | Nov. 01, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net |  | $ 40 | $ 140 | [1] | $ 180 |
DowDuPont Cost Synergy Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net |  |  |  |  | 187 |
Payments for Restructuring |  |  |  |  | (16) |
Asset write-offs |  |  |  |  | (3) |
Non-Cash Compensation |  |  |  |  | (7) |
Restructuring Reserve |  |  | 161 |  | 161 |
Employee Severance [Member] | DowDuPont Cost Synergy Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net |  |  |  |  | 153 |
Payments for Restructuring |  |  |  |  | (13) |
Asset write-offs |  |  |  |  | 0 |
Non-Cash Compensation |  |  |  |  | (7) |
Restructuring Reserve |  |  | 133 |  | 133 |
Other Non-Personnel Charges | DowDuPont Cost Synergy Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net | [2] |  |  |  | 31 |
Payments for Restructuring | [2] |  |  |  | (3) |
Asset write-offs | [2] |  |  |  | 0 |
Non-Cash Compensation | [2] |  |  |  | 0 |
Restructuring Reserve | [2] |  | 28 |  | 28 |
Asset Related Charges [Member] | DowDuPont Cost Synergy Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net |  |  |  |  | 3 |
Payments for Restructuring |  |  |  |  | 0 |
Asset write-offs |  |  |  |  | (3) |
Non-Cash Compensation |  |  |  |  | 0 |
Restructuring Reserve |  |  | $ 0 |  | $ 0 |
Minimum [Member] | DowDuPont Cost Synergy Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost |  |  |  |  |  | $ 430
Minimum [Member] | Employee Severance [Member] | DowDuPont Cost Synergy Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost |  |  |  |  |  | 320
Minimum [Member] | Other Non-Personnel Charges | DowDuPont Cost Synergy Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost |  |  |  |  |  | 110
Maximum [Member] | DowDuPont Cost Synergy Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost |  |  |  |  |  | 600
Maximum [Member] | Employee Severance [Member] | DowDuPont Cost Synergy Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost |  |  |  |  |  | 360
Maximum [Member] | Other Non-Personnel Charges | DowDuPont Cost Synergy Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost |  |  |  |  |  | 140
Maximum [Member] | Asset Related Charges [Member] | DowDuPont Cost Synergy Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Related Cost, Expected Cost |  |  |  |  |  | $ 100
[1] | See Note 5 for additional information.
[2] | Other non-personnel charges consist of contractual obligation costs.

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