Goodwill and Other Intangible Assets Other Intangible Assets (Details) - USD ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		$ 16,153		$ 16,334
Finite-Lived Intangible Assets, Accumulated Amortization		(1,651)		(389)
Finite-Lived Intangible Assets, Net		14,502		15,945
Indefinite-lived Intangible Assets (Excluding Goodwill)		11,551		11,781
Intangible Assets, Gross (Excluding Goodwill)		27,704		28,115
Total other intangible assets		26,053		27,726
In Process Research and Development [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)		545	[1]	660
Germplasm [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)	[2]	6,265		6,265
Trademarks and Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)		4,741		4,856
Customer-Related Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		9,325		9,502
Finite-Lived Intangible Assets, Accumulated Amortization		(744)		(186)
Finite-Lived Intangible Assets, Net		8,581		9,316
Developed Technology Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		4,506		4,364
Finite-Lived Intangible Assets, Accumulated Amortization		(628)		(144)
Finite-Lived Intangible Assets, Net		3,878		4,220
Trademarks and Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		1,084		1,117
Finite-Lived Intangible Assets, Accumulated Amortization		(114)		(26)
Finite-Lived Intangible Assets, Net		970		1,091
Favorable Supply Contract [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		475		495
Finite-Lived Intangible Assets, Accumulated Amortization		(111)		(17)
Finite-Lived Intangible Assets, Net		364		478
Microbial Cell Factories [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		386		397
Finite-Lived Intangible Assets, Accumulated Amortization		(22)		(6)
Finite-Lived Intangible Assets, Net		364		391
Other Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	[3]	377		459
Finite-Lived Intangible Assets, Accumulated Amortization	[3]	(32)		(10)
Finite-Lived Intangible Assets, Net	[3]	$ 345		$ 449

[1] Refer to discussion of impairment analysis above.

[2] Germplasm is the pool of genetic source material and body of knowledge gained from the development and delivery stage of plant breeding. This intangible asset is expected to contribute to cash flows beyond the foreseeable future and there are no legal, regulatory, contractual, or other factors which limit its useful life.

[3] Primarily consists of sales and farmer networks, marketing and manufacturing alliances and noncompetition agreements.