Intangible Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 1,232		$ 1,232		$ 1,828
Accumulated amortization	(1,216)		(1,216)		(1,810)
Net carrying amount	16		16		18
Acquired Indefinite-lived Intangible Assets [Line Items]
Total indefinite-lived intangible assets	433		433		433
Total intangible assets, net	449		449		451
Amortization expense disclosure
Amortization expense	2	$ 14	7	$ 47
Activision trademark
Acquired Indefinite-lived Intangible Assets [Line Items]
Total indefinite-lived intangible assets	386		386		386
Trade names and other
Acquired Indefinite-lived Intangible Assets [Line Items]
Total indefinite-lived intangible assets	47		47		47
Internally-developed franchises
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,154		1,154		1,154
Accumulated amortization	(1,154)		(1,154)		(1,151)
Net carrying amount	0		$ 0		$ 3
Internally-developed franchises | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful lives			3 years		3 years
Internally-developed franchises | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful lives			11 years		11 years
Developed software
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount					$ 601
Accumulated amortization					(601)
Net carrying amount					$ 0
Developed software | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful lives					2 years
Developed software | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful lives					5 years
Trade names and other
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	78		$ 78		$ 73
Accumulated amortization	(62)		(62)		(58)
Net carrying amount	$ 16		$ 16		$ 15
Trade names and other | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful lives			1 year		1 year
Trade names and other | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful lives			10 years		10 years