Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill for the three months ended March 31, 2014 are as follows (in millions):



Balance as of December 31, 2013	$	839
Effect of currency translation adjustment	1
Balance as of March 31, 2014	$	840

Intangible Assets

Intangible assets consisted of the following (in millions):



		March 31, 2014							December 31, 2013
	Useful lives from date of acquisitions (in years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizable intangible assets:
Acquired patents	2 - 18	$	773	$	(167	)	$	606	$	773	$	(142	)	$	631
Acquired technology	2 - 10	227		(75		)	152		227		(65		)	162
Tradename and other	2 - 10	138		(54		)	84		138		(48		)	90
Total		$	1,138	$	(296	)	$	842	$	1,138	$	(255	)	$	883

Estimated Amortization Expense for Unamortized Acquired Intangible Assets

As of March 31, 2014, estimated amortization expense for the unamortized acquired intangible assets for the next five years and thereafter is as follows (in millions):



The remainder of 2014	$	119
2015	150
2016	138
2017	116
2018	82
2019	64
Thereafter	173
	$	842