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Restructuring and Asset Related Charges DowDuPont Cost Synergy Program (Details) - USD ($) $ in Millions | 3 Months Ended | 4 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017 | Jun. 30, 2018 | Nov. 01, 2017
DowDuPont Cost Synergy Program [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring Reserve, Beginning Balance |  |  | $ 161 |
Restructuring Reserve, Ending Balance | $ 259 | $ 161 | 259 |
Employee Severance [Member] | DowDuPont Cost Synergy Program [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring Reserve, Beginning Balance |  |  | 133 |
Restructuring Reserve, Ending Balance | 226 | 133 | 226 |
Contract Termination Charges | DowDuPont Cost Synergy Program [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring Reserve, Beginning Balance |  |  | 28 |
Restructuring Reserve, Ending Balance | 33 | 28 | 33 |
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] | Contract Termination 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] | Contract Termination 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
Successor [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and Asset Related Charges - Net | 91 |  | 188 |
Successor [Member] | DowDuPont Cost Synergy Program [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and Asset Related Charges - Net | 94 | 187 | 191 |
Payments for Restructuring |  |  | (85) |
Restructuring Reserve, Net Translation Adjustment |  |  | (2) |
Asset write-offs and adjustments |  |  | (6) |
Successor [Member] | Employee Severance [Member] | DowDuPont Cost Synergy Program [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and Asset Related Charges - Net | 84 | 153 | 152 |
Payments for Restructuring |  |  | (57) |
Restructuring Reserve, Net Translation Adjustment |  |  | (2) |
Successor [Member] | Contract Termination Charges | DowDuPont Cost Synergy Program [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and Asset Related Charges - Net | 4 | 31 | 33 |
Payments for Restructuring |  |  | (28) |
Restructuring Reserve, Net Translation Adjustment |  |  | 0 |
Successor [Member] | Asset Related Charges [Member] | DowDuPont Cost Synergy Program [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring and Asset Related Charges - Net | $ 6 | $ 3 | 6 |
Asset write-offs and adjustments |  |  | $ (6) |

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