Other Intangible Assets (Schedule of Other Intangible Assets) (Details) - USD ($) $ in Millions		Sep. 30, 2015	Dec. 31, 2014
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Definite-lived Intangible Assets, Gross		$ 3,439	$ 4,184
Definite-lived Intangible Assets, Accumulated Amortization		(1,414)	(1,814)
Definite-lived Intangible Assets, Net		2,025	2,370
Indefinite-lived Intangible Assets		2,189	2,199
Total Intangible Assets, Gross		5,628	6,383
Total Intangible Assets, Accumulated Amortization		(1,414)	(1,814)
Intangible Assets Net Excluding Goodwill		4,214	4,569
In Process Research and Development [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets		77	29
Microbial Cell Factories [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets		306	306
Pioneer Germplasm [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets		1,050	1,064
Trademarks/Tradenames [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets		756	800
Customer Lists [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Definite-lived Intangible Assets, Gross		1,639	1,699
Definite-lived Intangible Assets, Accumulated Amortization		(514)	(465)
Definite-lived Intangible Assets, Net		1,125	1,234
Patents [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Definite-lived Intangible Assets, Gross		457	474
Definite-lived Intangible Assets, Accumulated Amortization		(211)	(184)
Definite-lived Intangible Assets, Net		246	290
Purchased and Licensed Technology [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Definite-lived Intangible Assets, Gross		1,131	1,783
Definite-lived Intangible Assets, Accumulated Amortization		(604)	(1,069)
Definite-lived Intangible Assets, Net		527	714
Trademarks [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Definite-lived Intangible Assets, Gross		26	26
Definite-lived Intangible Assets, Accumulated Amortization		(13)	(12)
Definite-lived Intangible Assets, Net		13	14
Other [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Definite-lived Intangible Assets, Gross	[1]	186	202
Definite-lived Intangible Assets, Accumulated Amortization	[1]	(72)	(84)
Definite-lived Intangible Assets, Net	[1]	$ 114	$ 118

[1] Primarily consists of sales and grower networks, marketing and manufacturing alliances and noncompetition agreements.