NOTE 8. INTANGIBLE ASSETS

Intangible assets are comprised of the following:



	September 30, 2014						December 31, 2013
	Gross Carrying Amount		Less: Accumulated Amortization		Net		Gross Carrying Amount		Less: Accumulated Amortization		Net
Technology	$	850	$	378	$	472	$	814	$	337	$	477
Customer relationships	509		187		322		494		157		337
Trade names	122		90		32		120		82		38
Other ⁽¹⁾	43		12		31		43		12		31
Total intangible assets	$	1,524	$	667	$	857	$	1,471	$	588	$	883


⁽¹⁾	Includes indefinite-lived intangibles of $26 million at September 30, 2014 and $27 million at December 31, 2013 related to in-process research and development projects.

Intangible assets are generally amortized on a straight-line basis with estimated useful lives ranging from 3 to 30 years. Amortization expense included in net income for the three and nine months ended September 30, 2014 was $26 million and $79 million, respectively, as compared to $30 million and $89 million reported in 2013 for the same period.

Amortization expense of these intangibles over the remainder of 2014 and for each of the subsequent five fiscal years is expected to be as follows:



Year	Estimated Amortization Expense
Remainder of 2014	$	28
2015	102
2016	101
2017	97
2018	91
2019	88