Intangible Assets, Net

12 Months Ended

Dec. 31, 2015

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Intangible assets, net consist of the following (amounts in millions):



	At December 31, 2015
	Estimated useful lives	Gross carrying amount		Accumulated amortization			Net carrying amount
Acquired definite-lived intangible assets:
License agreements and other	1 - 10 years	$	116	$	(93	)	$	23
Internally-developed franchises	11 years	309		(298		)	11
Developed software	5 years	15		—			15
Total definite-lived intangible assets		$	440	$	(391	)	$	49
Acquired indefinite-lived intangible assets:
Activision trademark	Indefinite						386
Acquired trade names	Indefinite						47
Total indefinite-lived intangible assets							$	433



	At December 31, 2014
	Estimated useful lives	Gross carrying amount		Accumulated amortization			Net carrying amount
Acquired definite-lived intangible assets:
License agreements and other	3 - 10 years	$	98	$	(92	)	$	6
Internally-developed franchises	11 years	309		(286		)	23
Total definite-lived intangible assets		$	407	$	(378	)	$	29
Acquired indefinite-lived intangible assets:
Activision trademark	Indefinite						386
Acquired trade names	Indefinite						47
Total indefinite-lived intangible assets							$	433

Amortization expense of intangible assets was $13 million, $13 million, and $24 million for the years ended December 31, 2015, 2014, and 2013, respectively.

At December 31, 2015, future amortization of definite-lived intangible assets is estimated as follows (amounts in millions):



2016	$	17
2017	12
2018	7
2019	5
2020	4
Thereafter	4
Total	$	49

We did not record any impairment charges against our intangible assets for the years ended December 31, 2015, 2014 and 2013.