Intangible Assets, Net

12 Months Ended

Dec. 31, 2019

Intangible Assets, Net (Excluding Goodwill) [Abstract]

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



	At December 31, 2019
	Estimated useful lives			Gross carrying amount		Accumulated amortization			Net carrying amount
Acquired definite-lived intangible assets:
Internally-developed franchises	3	-	11 years	$	1,154	$	(1,105	)	$	49
Developed software	2	-	5 years	601		(579		)	22
Trade names	7	-	10 years	54		(30		)	24
Other	1	-	15 years	19		(16		)	3
Total definite-lived intangible assets (1)				$	1,828	$	(1,730	)	$	98

Acquired indefinite-lived intangible assets:
Activision trademark	Indefinite								$	386
Acquired trade names	Indefinite								47
Total indefinite-lived intangible assets									$	433
Total intangible assets, net									$	531



	At December 31, 2018
	Estimated useful lives			Gross carrying amount		Accumulated amortization			Net carrying amount
Acquired definite-lived intangible assets:
Internally-developed franchises	3	-	11 years	$	1,154	$	(1,032	)	$	122
Developed software	2	-	5 years	601		(456		)	145
Customer base	2 years			617		(617		)	—
Trade names	7	-	10 years	54		(23		)	31
Other	1	-	15 years	19		(15		)	4
Total definite-lived intangible assets				$	2,445	$	(2,143	)	$	302

Acquired indefinite-lived intangible assets:
Activision trademark	Indefinite								$	386
Acquired trade names	Indefinite								47
Total indefinite-lived intangible assets									$	433
Total intangible assets, net									$	735


(1)	Beginning with the first quarter of 2019, the balances of the customer base intangible assets have been removed, as such amounts were fully amortized in the prior year.

Amortization expense of intangible assets was $204 million, $371 million, and $759 million for the years ended December 31, 2019, 2018, and 2017, respectively.

At December 31, 2019, future amortization of definite-lived intangible assets is estimated as follows (amounts in millions):



2020	$	75
2021	11
2022	7
2023	2
2024	1
Thereafter	2
Total	$	98