Intangible Assets, Net - Schedule of Intangible Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Finite-Lived Intangible Assets
Gross carrying amount, definite-lived intangible assets	$ 2,445		$ 2,445		$ 2,445
Accumulated amortization, definite-lived intangible assets	(2,052)		(2,052)		(1,772)
Net carrying amount, definite-lived intangible assets	393		393		673
Indefinite Lived Intangible Assets
Net carrying amount, indefinite-lived intangible assets	433		433		433
Total intangible assets, net	826		826		1,106
Amortization Expense Disclosure
Amortization expense	84	$ 188	280	$ 573
Activision trademark
Indefinite Lived Intangible Assets
Net carrying amount, indefinite-lived intangible assets	386		386		386
Acquired trade names
Indefinite Lived Intangible Assets
Net carrying amount, indefinite-lived intangible assets	47		47		47
Internally-developed franchises
Finite-Lived Intangible Assets
Gross carrying amount, definite-lived intangible assets	1,154		1,154		1,154
Accumulated amortization, definite-lived intangible assets	(987)		(987)		(869)
Net carrying amount, definite-lived intangible assets	167		$ 167		$ 285
Internally-developed franchises | Minimum
Finite-Lived Intangible Assets
Estimated useful life			3 years		3 years
Internally-developed franchises | Maximum
Finite-Lived Intangible Assets
Estimated useful life			11 years		11 years
Developed software
Finite-Lived Intangible Assets
Gross carrying amount, definite-lived intangible assets	601		$ 601		$ 601
Accumulated amortization, definite-lived intangible assets	(413)		(413)		(301)
Net carrying amount, definite-lived intangible assets	188		$ 188		$ 300
Developed software | Minimum
Finite-Lived Intangible Assets
Estimated useful life			2 years		2 years
Developed software | Maximum
Finite-Lived Intangible Assets
Estimated useful life			5 years		5 years
Customer base
Finite-Lived Intangible Assets
Estimated useful life			2 years		2 years
Gross carrying amount, definite-lived intangible assets	617		$ 617		$ 617
Accumulated amortization, definite-lived intangible assets	(617)		(617)		(573)
Net carrying amount, definite-lived intangible assets	0		0		44
Acquired trade names
Finite-Lived Intangible Assets
Gross carrying amount, definite-lived intangible assets	54		54		54
Accumulated amortization, definite-lived intangible assets	(21)		(21)		(16)
Net carrying amount, definite-lived intangible assets	33		$ 33		$ 38
Acquired trade names | Minimum
Finite-Lived Intangible Assets
Estimated useful life			7 years		7 years
Acquired trade names | Maximum
Finite-Lived Intangible Assets
Estimated useful life			10 years		10 years
Other
Finite-Lived Intangible Assets
Gross carrying amount, definite-lived intangible assets	19		$ 19		$ 19
Accumulated amortization, definite-lived intangible assets	(14)		(14)		(13)
Net carrying amount, definite-lived intangible assets	$ 5		$ 5		$ 6
Other | Minimum
Finite-Lived Intangible Assets
Estimated useful life			1 year		1 year
Other | Maximum
Finite-Lived Intangible Assets
Estimated useful life			15 years		15 years