Other Intangible Assets

3 Months Ended

Mar. 31, 2015

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, 2015							December 31, 2014
	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Intangible assets subject to amortization (Definite-lived):
Customer lists	$	1,612	$	(475	)	$	1,137	$	1,706	$	(470	)	$	1,236
Patents	470		(202		)	268		493		(199		)	294
Purchased and licensed technology	1,772		(1,142		)	630		1,789		(1,074		)	715
Trademarks	31		(14		)	17		31		(14		)	17
Other 1	210		(90		)	120		207		(88		)	119
	4,095		(1,923		)	2,172		4,226		(1,845		)	2,381
Intangible assets not subject to amortization (Indefinite-lived):
In-process research and development	25		—			25		29		—			29
Microbial cell factories	306		—			306		306		—			306
Pioneer germplasm	1,063		—			1,063		1,064		—			1,064
Trademarks/tradenames	741		—			741		800		—			800
	2,135		—			2,135		2,199		—			2,199
Total	$	6,230	$	(1,923	)	$	4,307	$	6,425	$	(1,845	)	$	4,580

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

The aggregate pre-tax amortization expense for definite-lived intangible assets was $140 and $125 for the three months ended March 31, 2015 and 2014, respectively. The estimated aggregate pre-tax amortization expense for the remainder of 2015 and each of the next five years is approximately $217, $353, $218, $218, $203 and $184, respectively.