Operating Segments and Geographic Region (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) segment	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	3
Segment Reporting Information [Line Items]
Segment revenues	$ 2,066	$ 1,522
Operating income	795	612
Net effect from recognition (deferral) of deferred net revenues	(209)	(266)
Net revenues	2,275	1,788
Amortization of intangible assets	(5)	(33)
Restructuring costs	(30)	(23)
Interest and other expense (income), net (Note 12)	30	8
Income before income tax expense	765	604
Long-lived assets	429		$ 453
Digital online channels
Segment Reporting Information [Line Items]
Segment revenues	1,865	1,355
Net effect from recognition (deferral) of deferred net revenues	(141)	(86)
Net revenues	2,006	1,441
Retail channels
Segment Reporting Information [Line Items]
Segment revenues	75	49
Net effect from recognition (deferral) of deferred net revenues	(74)	(172)
Net revenues	149	221
Other
Segment Reporting Information [Line Items]
Segment revenues	126	118
Net effect from recognition (deferral) of deferred net revenues	6	(8)
Net revenues	120	126
Console
Segment Reporting Information [Line Items]
Segment revenues	626	363
Net effect from recognition (deferral) of deferred net revenues	(173)	(231)
Net revenues	799	594
PC
Segment Reporting Information [Line Items]
Segment revenues	577	479
Net effect from recognition (deferral) of deferred net revenues	(45)	(19)
Net revenues	622	498
Mobile and ancillary
Segment Reporting Information [Line Items]
Segment revenues	737	562
Net effect from recognition (deferral) of deferred net revenues	3	(8)
Net revenues	734	570
Other
Segment Reporting Information [Line Items]
Segment revenues	126	118
Net effect from recognition (deferral) of deferred net revenues	6	(8)
Net revenues	120	126
Americas
Segment Reporting Information [Line Items]
Segment revenues	1,186	805
Net effect from recognition (deferral) of deferred net revenues	(121)	(143)
Net revenues	1,307	$ 948
Long-lived assets	$ 259		270
US | Revenues | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Revenues as a percentage of consolidated net revenues	50.00%	47.00%
EMEA
Segment Reporting Information [Line Items]
Segment revenues	$ 666	$ 465
Net effect from recognition (deferral) of deferred net revenues	(65)	(101)
Net revenues	731	$ 566
Long-lived assets	$ 156		166
UK | Revenues | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Revenues as a percentage of consolidated net revenues	11.00%	9.00%
Asia Pacific
Segment Reporting Information [Line Items]
Segment revenues	$ 214	$ 252
Net effect from recognition (deferral) of deferred net revenues	(23)	(22)
Net revenues	237	274
Long-lived assets	14		$ 17
Reportable segments
Segment Reporting Information [Line Items]
Segment revenues	1,983	1,469
Operating income	853	537
Reportable segments | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment revenues	1,958	1,454
Reportable segments | Intersegment net revenues
Segment Reporting Information [Line Items]
Segment revenues	25	15
Reportable segments | Activision
Segment Reporting Information [Line Items]
Segment revenues	891	519
Operating income	442	184
Net effect from recognition (deferral) of deferred net revenues	(232)	(261)
Net revenues	1,123	780
Reportable segments | Activision | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment revenues	891	519
Reportable segments | Activision | Intersegment net revenues
Segment Reporting Information [Line Items]
Segment revenues	0	0
Reportable segments | Activision | Digital online channels
Segment Reporting Information [Line Items]
Segment revenues	803	455
Net effect from recognition (deferral) of deferred net revenues	(162)	(93)
Net revenues	965	548
Reportable segments | Activision | Retail channels
Segment Reporting Information [Line Items]
Segment revenues	73	44
Net effect from recognition (deferral) of deferred net revenues	(70)	(168)
Net revenues	143	212
Reportable segments | Activision | Other
Segment Reporting Information [Line Items]
Segment revenues	15	20
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	15	20
Reportable segments | Activision | Console
Segment Reporting Information [Line Items]
Segment revenues	607	344
Net effect from recognition (deferral) of deferred net revenues	(167)	(223)
Net revenues	774	567
Reportable segments | Activision | PC
Segment Reporting Information [Line Items]
Segment revenues	140	89
Net effect from recognition (deferral) of deferred net revenues	(61)	(37)
Net revenues	201	126
Reportable segments | Activision | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment revenues	129	66
Net effect from recognition (deferral) of deferred net revenues	(4)	(1)
Net revenues	133	67
Reportable segments | Activision | Other
Segment Reporting Information [Line Items]
Segment revenues	15	20
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	15	20
Reportable segments | Activision | Americas
Segment Reporting Information [Line Items]
Segment revenues	594	326
Net effect from recognition (deferral) of deferred net revenues	(131)	(146)
Net revenues	725	472
Reportable segments | Activision | EMEA
Segment Reporting Information [Line Items]
Segment revenues	234	143
Net effect from recognition (deferral) of deferred net revenues	(77)	(96)
Net revenues	311	239
Reportable segments | Activision | Asia Pacific
Segment Reporting Information [Line Items]
Segment revenues	63	50
Net effect from recognition (deferral) of deferred net revenues	(24)	(19)
Net revenues	87	69
Reportable segments | Blizzard
Segment Reporting Information [Line Items]
Segment revenues	483	452
Operating income	208	197
Net effect from recognition (deferral) of deferred net revenues	13	3
Net revenues	470	449
Reportable segments | Blizzard | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment revenues	458	437
Reportable segments | Blizzard | Intersegment net revenues
Segment Reporting Information [Line Items]
Segment revenues	25	15
Reportable segments | Blizzard | Digital online channels
Segment Reporting Information [Line Items]
Segment revenues	478	417
Net effect from recognition (deferral) of deferred net revenues	17	8
Net revenues	461	409
Reportable segments | Blizzard | Retail channels
Segment Reporting Information [Line Items]
Segment revenues	2	5
Net effect from recognition (deferral) of deferred net revenues	(4)	(4)
Net revenues	6	9
Reportable segments | Blizzard | Other
Segment Reporting Information [Line Items]
Segment revenues	3	30
Net effect from recognition (deferral) of deferred net revenues	0	(1)
Net revenues	3	31
Reportable segments | Blizzard | Console
Segment Reporting Information [Line Items]
Segment revenues	19	19
Net effect from recognition (deferral) of deferred net revenues	(6)	(8)
Net revenues	25	27
Reportable segments | Blizzard | PC
Segment Reporting Information [Line Items]
Segment revenues	439	381
Net effect from recognition (deferral) of deferred net revenues	17	19
Net revenues	422	362
Reportable segments | Blizzard | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment revenues	22	22
Net effect from recognition (deferral) of deferred net revenues	2	(7)
Net revenues	20	29
Reportable segments | Blizzard | Other
Segment Reporting Information [Line Items]
Segment revenues	3	30
Net effect from recognition (deferral) of deferred net revenues	0	(1)
Net revenues	3	31
Reportable segments | Blizzard | Americas
Segment Reporting Information [Line Items]
Segment revenues	215	174
Net effect from recognition (deferral) of deferred net revenues	5	2
Net revenues	210	172
Reportable segments | Blizzard | EMEA
Segment Reporting Information [Line Items]
Segment revenues	174	124
Net effect from recognition (deferral) of deferred net revenues	7	3
Net revenues	167	121
Reportable segments | Blizzard | Asia Pacific
Segment Reporting Information [Line Items]
Segment revenues	94	154
Net effect from recognition (deferral) of deferred net revenues	1	(2)
Net revenues	93	156
Reportable segments | King
Segment Reporting Information [Line Items]
Segment revenues	609	498
Operating income	203	156
Net effect from recognition (deferral) of deferred net revenues	4	(1)
Net revenues	605	499
Reportable segments | King | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment revenues	609	498
Reportable segments | King | Intersegment net revenues
Segment Reporting Information [Line Items]
Segment revenues	0	0
Reportable segments | King | Digital online channels
Segment Reporting Information [Line Items]
Segment revenues	609	498
Net effect from recognition (deferral) of deferred net revenues	4	(1)
Net revenues	605	499
Reportable segments | King | Retail channels
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Reportable segments | King | Other
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Reportable segments | King | Console
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Reportable segments | King | PC
Segment Reporting Information [Line Items]
Segment revenues	23	24
Net effect from recognition (deferral) of deferred net revenues	(1)	(1)
Net revenues	24	25
Reportable segments | King | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment revenues	586	474
Net effect from recognition (deferral) of deferred net revenues	5	0
Net revenues	581	474
Reportable segments | King | Other
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Reportable segments | King | Americas
Segment Reporting Information [Line Items]
Segment revenues	391	312
Net effect from recognition (deferral) of deferred net revenues	5	1
Net revenues	386	311
Reportable segments | King | EMEA
Segment Reporting Information [Line Items]
Segment revenues	159	135
Net effect from recognition (deferral) of deferred net revenues	(1)	(1)
Net revenues	160	136
Reportable segments | King | Asia Pacific
Segment Reporting Information [Line Items]
Segment revenues	59	51
Net effect from recognition (deferral) of deferred net revenues	0	(1)
Net revenues	59	52
Non-reportable segments
Segment Reporting Information [Line Items]
Segment revenues	108	68
Net effect from recognition (deferral) of deferred net revenues	6	(7)
Net revenues	102	75
Non-reportable segments | Digital online channels
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Non-reportable segments | Retail channels
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Non-reportable segments | Other
Segment Reporting Information [Line Items]
Segment revenues	108	68
Net effect from recognition (deferral) of deferred net revenues	6	(7)
Net revenues	102	75
Non-reportable segments | Console
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Non-reportable segments | PC
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Non-reportable segments | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Non-reportable segments | Other
Segment Reporting Information [Line Items]
Segment revenues	108	68
Net effect from recognition (deferral) of deferred net revenues	6	(7)
Net revenues	102	75
Non-reportable segments | Americas
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Non-reportable segments | EMEA
Segment Reporting Information [Line Items]
Segment revenues	108	68
Net effect from recognition (deferral) of deferred net revenues	6	(7)
Net revenues	102	75
Non-reportable segments | Asia Pacific
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Reconciling items
Segment Reporting Information [Line Items]
Net effect from recognition (deferral) of deferred net revenues	209	266
Net effect from recognition (deferral) of deferred net revenues and related cost of revenues	132	171
Share-based compensation expense	(151)	(43)
Amortization of intangible assets	(5)	(33)
Restructuring costs	(30)	(23)
Reconciling items | Other segments
Segment Reporting Information [Line Items]
Operating income	(4)	3
Elimination of intersegment revenues
Segment Reporting Information [Line Items]
Segment revenues	(25)	(15)
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	(25)	(15)
Elimination of intersegment revenues | Digital online channels
Segment Reporting Information [Line Items]
Segment revenues	(25)	(15)
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	(25)	(15)
Elimination of intersegment revenues | Retail channels
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Elimination of intersegment revenues | Other
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Elimination of intersegment revenues | Console
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Elimination of intersegment revenues | PC
Segment Reporting Information [Line Items]
Segment revenues	(25)	(15)
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	(25)	(15)
Elimination of intersegment revenues | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Elimination of intersegment revenues | Other
Segment Reporting Information [Line Items]
Segment revenues	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	0	0
Elimination of intersegment revenues | Americas
Segment Reporting Information [Line Items]
Segment revenues	(14)	(7)
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	(14)	(7)
Elimination of intersegment revenues | EMEA
Segment Reporting Information [Line Items]
Segment revenues	(9)	(5)
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	(9)	(5)
Elimination of intersegment revenues | Asia Pacific
Segment Reporting Information [Line Items]
Segment revenues	(2)	(3)
Net effect from recognition (deferral) of deferred net revenues	0	0
Net revenues	$ (2)	$ (3)