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Goodwill and Other Intangible Assets Acquired Intangible Assets (Details) - Merger with Dow [Member] $ in Millions | Aug. 31, 2017 USD ($)
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Acquired Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived Intangible Assets Acquired | $ 15,436 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 27,221 | [1]
In Process Research and Development [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Indefinite-lived Intangible Assets Acquired | 660 |
Germplasm [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Indefinite-lived Intangible Assets Acquired | 6,263 |
Trademarks and Trade Names [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Indefinite-lived Intangible Assets Acquired | 4,862 |
Customer-Related Intangible Assets [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived Intangible Assets Acquired | $ 9,264 |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 17 years |
Developed Technology Rights [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived Intangible Assets Acquired | $ 4,239 |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 12 years |
Trademarks and Trade Names [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived Intangible Assets Acquired | $ 1,080 |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 15 years |
Microbial Cell Factories [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived Intangible Assets Acquired | $ 400 |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 23 years |
Other Intangible Assets [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived Intangible Assets Acquired | $ 453 |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 17 years |
[1] | See Note 12 for additional information.

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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