Intangible Assets, Net - Schedule of Intangible Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Finite-Lived Intangible Assets
Gross carrying amount, definite-lived intangible assets	$ 1,227		$ 1,828
Accumulated amortization, definite-lived intangible assets	(1,214)		(1,810)
Net carrying amount, definite-lived intangible assets	13		18
Indefinite Lived Intangible Assets
Net carrying amount, indefinite-lived intangible assets	433		433
Total intangible assets, net	446		451
Amortization Expense Disclosure
Amortization expense	5	$ 33
Activision trademark
Indefinite Lived Intangible Assets
Net carrying amount, indefinite-lived intangible assets	386		386
Acquired trade names
Indefinite Lived Intangible Assets
Net carrying amount, indefinite-lived intangible assets	47		47
Internally-developed franchises
Finite-Lived Intangible Assets
Gross carrying amount, definite-lived intangible assets	1,154		1,154
Accumulated amortization, definite-lived intangible assets	(1,154)		(1,151)
Net carrying amount, definite-lived intangible assets	$ 0		$ 3
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
Accumulated amortization, definite-lived intangible assets			(601)
Net carrying amount, definite-lived intangible assets			$ 0
Developed software | Minimum
Finite-Lived Intangible Assets
Estimated useful life			2 years
Developed software | Maximum
Finite-Lived Intangible Assets
Estimated useful life			5 years
Trade names and other
Finite-Lived Intangible Assets
Gross carrying amount, definite-lived intangible assets	$ 73		$ 73
Accumulated amortization, definite-lived intangible assets	(60)		(58)
Net carrying amount, definite-lived intangible assets	$ 13		$ 15
Trade names and other | Minimum
Finite-Lived Intangible Assets
Estimated useful life	1 year		1 year
Trade names and other | Maximum
Finite-Lived Intangible Assets
Estimated useful life	10 years		10 years