Other Intangible Assets

3 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Other Intangible Assets

Other Intangible Assets

The gross carrying amounts and accumulated amortization of other intangible assets by major class are as follows: 

	March 31, 2017							December 31, 2016
	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Intangible assets subject to amortization (Definite-lived):
Customer lists	$	1,597	$	(612	)	$	985	$	1,574	$	(586	)	$	988
Patents	451		(280		)	171		446		(259		)	187
Purchased and licensed technology	930		(577		)	353		964		(579		)	385
Trademarks / trade names	53		(16		)	37		53		(15		)	38
Other1	172		(86		)	86		171		(82		)	89
	3,203		(1,571		)	1,632		3,208		(1,521		)	1,687
Intangible assets not subject to amortization (Indefinite-lived):
In-process research and development	74		—			74		73		—			73
Microbial cell factories	306		—			306		306		—			306
Pioneer germplasm	1,057		—			1,057		1,053		—			1,053
Trademarks / trade names	555		—			555		545		—			545
	1,992		—			1,992		1,977		—			1,977
Total	$	5,195	$	(1,571	)	$	3,624	$	5,185	$	(1,521	)	$	3,664

^1.  Primarily consists of sales networks, marketing and manufacturing alliances and noncompetition agreements.

The aggregate pre-tax amortization expense from continuing operations for definite-lived intangible assets was $51 and $122 for the three months ended March 31, 2017 and 2016, respectively. The estimated aggregate pre-tax amortization expense from continuing operations for the remainder of 2017 and each of the next five years is approximately $151, $209, $211, $193, $138 and $115, respectively.