Other Intangible Assets

6 Months Ended

Jun. 30, 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: 

	June 30, 2015							December 31, 2014
	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Intangible assets subject to amortization (Definite-lived):
Customer lists	$	1,637	$	(500	)	$	1,137	$	1,706	$	(470	)	$	1,236
Patents	476		(215		)	261		493		(199		)	294
Purchased and licensed technology	1,777		(1,223		)	554		1,789		(1,074		)	715
Trademarks	31		(15		)	16		31		(14		)	17
Other 1	189		(72		)	117		207		(88		)	119
	4,110		(2,025		)	2,085		4,226		(1,845		)	2,381
Intangible assets not subject to amortization (Indefinite-lived):
In-process research and development	77		—			77		29		—			29
Microbial cell factories	306		—			306		306		—			306
Pioneer germplasm	1,062		—			1,062		1,064		—			1,064
Trademarks/tradenames	756		—			756		800		—			800
	2,201		—			2,201		2,199		—			2,199
Total	$	6,311	$	(2,025	)	$	4,286	$	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 $117 and $257 for the three and six months ended June 30, 2015, respectively, and $119 and $245 for the three and six months ended June 30, 2014, respectively. The estimated aggregate pre-tax amortization expense for the remainder of 2015 and each of the next five years is approximately $100, $354, $218, $218, $204 and $187, respectively.