Other Intangible Assets (Schedule of Intangible Assets as a Result of Business Combination) (Details) - Merger with Dow [Domain] $ in Millions	Aug. 31, 2017 USD ($)
Finite-Lived Intangible Assets [Line Items]
Total Intangible Assets as a result of Merger	$ 27,844	[1]
Successor
Finite-Lived Intangible Assets [Line Items]
Total Intangible Assets as a result of Merger	27,844
Finite-lived intangible assets as a result of the Merger	15,355
In Process Research and Development [Member] | Successor
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets as a result of the Merger	655
Pioneer Germplasm [Member] | Successor
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets as a result of the Merger	6,773
Trademarks and Trade Names [Member] | Successor
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets as a result of the Merger	5,061
Customer-Related Intangible Assets [Member] | Successor
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets as a result of the Merger	$ 9,434
Finite-lived intangible asset, weighted average amortization period, years	18 years
Developed Technology Rights [Member] | Successor
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets as a result of the Merger	$ 4,124
Finite-lived intangible asset, weighted average amortization period, years	12 years
Trademarks and Trade Names [Member] | Successor
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets as a result of the Merger	$ 1,073
Finite-lived intangible asset, weighted average amortization period, years	12 years
Microbial Cell Factories [Member] | Successor
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets as a result of the Merger	$ 430
Finite-lived intangible asset, weighted average amortization period, years	23 years
Other | Successor
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets as a result of the Merger	$ 294
Finite-lived intangible asset, weighted average amortization period, years	15 years

[1] See Note 11 for additional information.