Other Intangible Assets (Schedule of Other Intangible Assets) (Details) - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Definite-lived Intangible Assets, Gross		$ 4,110	$ 4,226
Definite-lived Intangible Assets, Accumulated Amortization		(2,025)	(1,845)
Definite-lived Intangible Assets, Net		2,085	2,381
Indefinite-lived Intangible Assets		2,201	2,199
Total Intangible Assets, Gross		6,311	6,425
Total Intangible Assets, Accumulated Amortization		(2,025)	(1,845)
Intangible Assets Net Excluding Goodwill		4,286	4,580
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		1,062	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		1,637	1,706
Definite-lived Intangible Assets, Accumulated Amortization		(500)	(470)
Definite-lived Intangible Assets, Net		1,137	1,236
Patents [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Definite-lived Intangible Assets, Gross		476	493
Definite-lived Intangible Assets, Accumulated Amortization		(215)	(199)
Definite-lived Intangible Assets, Net		261	294
Purchased and Licensed Technology [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Definite-lived Intangible Assets, Gross		1,777	1,789
Definite-lived Intangible Assets, Accumulated Amortization		(1,223)	(1,074)
Definite-lived Intangible Assets, Net		554	715
Trademarks [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Definite-lived Intangible Assets, Gross		31	31
Definite-lived Intangible Assets, Accumulated Amortization		(15)	(14)
Definite-lived Intangible Assets, Net		16	17
Other [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Definite-lived Intangible Assets, Gross	[1]	189	207
Definite-lived Intangible Assets, Accumulated Amortization	[1]	(72)	(88)
Definite-lived Intangible Assets, Net	[1]	$ 117	$ 119

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