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Restructuring and Asset Related Charges DowDuPont Cost Synergy Program (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 34 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net |  | $ 179 | $ 60 | $ 249 | $ 121 |
DowDuPont Cost Synergy Program [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Reserve, Beginning Balance |  |  |  | 69 |  |
Restructuring and Asset Related Charges - Net |  | 0 | 60 | (3) | 122 | $ 842
Payments for Restructuring |  |  |  | (14) |  |
Restructuring Reserve, Ending Balance |  | 55 |  | 55 |  | 55
DowDuPont Cost Synergy Program [Member] | Severance and Related Benefit Costs |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Reserve, Beginning Balance |  |  |  | 29 |  |
Restructuring and Asset Related Charges - Net |  | 0 | 0 | 0 | 14 | 319
Payments for Restructuring |  |  |  | (13) |  |
Restructuring Reserve, Ending Balance |  | 16 |  | 16 |  | 16
DowDuPont Cost Synergy Program [Member] | Costs Associated with Exit and Disposal Activities |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Reserve, Beginning Balance | [1] |  |  | 40 |  |
Restructuring and Asset Related Charges - Net |  | 0 | 49 | 0 | 69 | 193
Payments for Restructuring | [1] |  |  | (1) |  |
Restructuring Reserve, Ending Balance | [1] | 39 |  | 39 |  | 39
DowDuPont Cost Synergy Program [Member] | Asset Related Charges [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net |  | 0 | 11 | (3) | 39 | $ 330
DowDuPont Cost Synergy Program [Member] | Seed [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net |  | (3) | 49 | (6) | 73 |
DowDuPont Cost Synergy Program [Member] | Crop Protection [Member] |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net |  | 3 | 2 | 3 | 29 |
DowDuPont Cost Synergy Program [Member] | Corporate |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring and Asset Related Charges - Net |  | $ 0 | $ 9 | $ 0 | $ 20 |
[1] | Relates primarily to contract terminations charges.

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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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