Operating Segments and Geographic Regions (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) segment	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			3
Segment Reporting Information [Line Items]
Segment net revenues	$ 1,880	$ 1,767	$ 5,867	$ 5,368
Segment operating income	824	778	2,578	2,139
Net effect from recognition (deferral) of deferred net revenues	(190)	(187)	(773)	(306)
Total consolidated net revenues	2,070	1,954	6,640	5,674
Amortization of intangible assets	(2)	(16)	(8)	(62)
Restructuring and related costs	(3)	(9)	(46)	(39)
Interest and other expense (income), net	65	25	52	55
Loss on extinguishment of debt	0	31	0	31
Income before income tax expense	759	722	2,526	2,053
Long-lived assets	421		421		$ 453
Americas
Segment Reporting Information [Line Items]
Segment net revenues	1,030	1,041	3,344	3,082
Net effect from recognition (deferral) of deferred net revenues	(136)	(86)	(475)	(106)
Total consolidated net revenues	1,166	1,127	3,819	3,188
Long-lived assets	273		273		270
EMEA
Segment Reporting Information [Line Items]
Segment net revenues	556	514	1,785	1,611
Net effect from recognition (deferral) of deferred net revenues	(63)	(75)	(260)	(159)
Total consolidated net revenues	619	589	2,045	1,770
Long-lived assets	131		131		166
Asia Pacific
Segment Reporting Information [Line Items]
Segment net revenues	294	212	738	675
Net effect from recognition (deferral) of deferred net revenues	9	(26)	(38)	(41)
Total consolidated net revenues	285	$ 238	776	$ 716
Long-lived assets	$ 17		$ 17		$ 17
US | Geographic Concentration Risk | Revenues
Segment Reporting Information [Line Items]
Percentage of concentration risk	49.00%	50.00%	50.00%	50.00%
UK | Geographic Concentration Risk | Revenues
Segment Reporting Information [Line Items]
Percentage of concentration risk	10.00%	9.00%	10.00%	10.00%
Digital online channels
Segment Reporting Information [Line Items]
Segment net revenues	$ 1,688	$ 1,605	$ 5,293	$ 4,781
Net effect from recognition (deferral) of deferred net revenues	(164)	(148)	(590)	(1)
Total consolidated net revenues	1,852	1,753	5,883	4,782
Retail channels
Segment Reporting Information [Line Items]
Segment net revenues	42	78	162	214
Net effect from recognition (deferral) of deferred net revenues	(27)	(39)	(192)	(295)
Total consolidated net revenues	69	117	354	509
Other
Segment Reporting Information [Line Items]
Segment net revenues	150	84	412	373
Net effect from recognition (deferral) of deferred net revenues	1	0	9	(10)
Total consolidated net revenues	149	84	403	383
Console
Segment Reporting Information [Line Items]
Segment net revenues	409	566	1,531	1,643
Net effect from recognition (deferral) of deferred net revenues	(114)	(129)	(530)	(301)
Total consolidated net revenues	523	695	2,061	1,944
PC
Segment Reporting Information [Line Items]
Segment net revenues	498	469	1,574	1,467
Net effect from recognition (deferral) of deferred net revenues	(80)	(45)	(253)	(27)
Total consolidated net revenues	578	514	1,827	1,494
Mobile and ancillary
Segment Reporting Information [Line Items]
Segment net revenues	823	648	2,350	1,885
Net effect from recognition (deferral) of deferred net revenues	3	(13)	1	32
Total consolidated net revenues	820	661	2,349	1,853
Other
Segment Reporting Information [Line Items]
Segment net revenues	150	84	412	373
Net effect from recognition (deferral) of deferred net revenues	1	0	9	(10)
Total consolidated net revenues	149	84	403	383
Reportable segments
Segment Reporting Information [Line Items]
Segment net revenues	1,786	1,720	5,626	5,198
Segment operating income	735	726	2,341	2,236
Reportable segments | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment net revenues	1,771	1,702	5,564	5,136
Reportable segments | Intersegment net revenues
Segment Reporting Information [Line Items]
Segment net revenues	15	18	62	62
Reportable segments | Activision
Segment Reporting Information [Line Items]
Segment net revenues	641	773	2,321	2,285
Segment operating income	244	345	1,049	1,088
Net effect from recognition (deferral) of deferred net revenues	(153)	(171)	(676)	(309)
Total consolidated net revenues	794	944	2,997	2,594
Reportable segments | Activision | Americas
Segment Reporting Information [Line Items]
Segment net revenues	405	518	1,522	1,491
Net effect from recognition (deferral) of deferred net revenues	(110)	(77)	(420)	(124)
Total consolidated net revenues	515	595	1,942	1,615
Reportable segments | Activision | EMEA
Segment Reporting Information [Line Items]
Segment net revenues	145	195	567	604
Net effect from recognition (deferral) of deferred net revenues	(42)	(68)	(213)	(146)
Total consolidated net revenues	187	263	780	750
Reportable segments | Activision | Asia Pacific
Segment Reporting Information [Line Items]
Segment net revenues	91	60	232	190
Net effect from recognition (deferral) of deferred net revenues	(1)	(26)	(43)	(39)
Total consolidated net revenues	92	86	275	229
Reportable segments | Activision | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment net revenues	641	773	2,321	2,285
Reportable segments | Activision | Intersegment net revenues
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Reportable segments | Activision | Digital online channels
Segment Reporting Information [Line Items]
Segment net revenues	595	696	2,134	2,038
Net effect from recognition (deferral) of deferred net revenues	(128)	(130)	(491)	(16)
Total consolidated net revenues	723	826	2,625	2,054
Reportable segments | Activision | Retail channels
Segment Reporting Information [Line Items]
Segment net revenues	38	69	149	192
Net effect from recognition (deferral) of deferred net revenues	(25)	(41)	(185)	(293)
Total consolidated net revenues	63	110	334	485
Reportable segments | Activision | Other
Segment Reporting Information [Line Items]
Segment net revenues	8	8	38	55
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	8	8	38	55
Reportable segments | Activision | Console
Segment Reporting Information [Line Items]
Segment net revenues	361	539	1,441	1,560
Net effect from recognition (deferral) of deferred net revenues	(119)	(125)	(530)	(295)
Total consolidated net revenues	480	664	1,971	1,855
Reportable segments | Activision | PC
Segment Reporting Information [Line Items]
Segment net revenues	107	117	387	373
Net effect from recognition (deferral) of deferred net revenues	(33)	(35)	(145)	(50)
Total consolidated net revenues	140	152	532	423
Reportable segments | Activision | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment net revenues	165	109	455	297
Net effect from recognition (deferral) of deferred net revenues	(1)	(11)	(1)	36
Total consolidated net revenues	166	120	456	261
Reportable segments | Activision | Other
Segment Reporting Information [Line Items]
Segment net revenues	8	8	38	55
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	8	8	38	55
Reportable segments | Blizzard
Segment Reporting Information [Line Items]
Segment net revenues	493	411	1,409	1,326
Segment operating income	188	133	537	533
Net effect from recognition (deferral) of deferred net revenues	(39)	(12)	(108)	13
Total consolidated net revenues	532	423	1,517	1,313
Reportable segments | Blizzard | Americas
Segment Reporting Information [Line Items]
Segment net revenues	216	188	641	598
Net effect from recognition (deferral) of deferred net revenues	(27)	(4)	(57)	18
Total consolidated net revenues	243	192	698	580
Reportable segments | Blizzard | EMEA
Segment Reporting Information [Line Items]
Segment net revenues	144	123	452	390
Net effect from recognition (deferral) of deferred net revenues	(22)	(8)	(55)	(3)
Total consolidated net revenues	166	131	507	393
Reportable segments | Blizzard | Asia Pacific
Segment Reporting Information [Line Items]
Segment net revenues	133	100	316	338
Net effect from recognition (deferral) of deferred net revenues	10	0	4	(2)
Total consolidated net revenues	123	100	312	340
Reportable segments | Blizzard | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment net revenues	478	393	1,347	1,264
Reportable segments | Blizzard | Intersegment net revenues
Segment Reporting Information [Line Items]
Segment net revenues	15	18	62	62
Reportable segments | Blizzard | Digital online channels
Segment Reporting Information [Line Items]
Segment net revenues	456	391	1,325	1,219
Net effect from recognition (deferral) of deferred net revenues	(37)	(14)	(101)	16
Total consolidated net revenues	493	405	1,426	1,203
Reportable segments | Blizzard | Retail channels
Segment Reporting Information [Line Items]
Segment net revenues	4	9	13	21
Net effect from recognition (deferral) of deferred net revenues	(2)	2	(7)	(2)
Total consolidated net revenues	6	7	20	23
Reportable segments | Blizzard | Other
Segment Reporting Information [Line Items]
Segment net revenues	33	11	71	86
Net effect from recognition (deferral) of deferred net revenues	0	0	0	(1)
Total consolidated net revenues	33	11	71	87
Reportable segments | Blizzard | Console
Segment Reporting Information [Line Items]
Segment net revenues	48	27	90	83
Net effect from recognition (deferral) of deferred net revenues	5	(4)	0	(6)
Total consolidated net revenues	43	31	90	89
Reportable segments | Blizzard | PC
Segment Reporting Information [Line Items]
Segment net revenues	387	348	1,185	1,084
Net effect from recognition (deferral) of deferred net revenues	(47)	(9)	(108)	24
Total consolidated net revenues	434	357	1,293	1,060
Reportable segments | Blizzard | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment net revenues	25	25	63	73
Net effect from recognition (deferral) of deferred net revenues	3	1	0	(4)
Total consolidated net revenues	22	24	63	77
Reportable segments | Blizzard | Other
Segment Reporting Information [Line Items]
Segment net revenues	33	11	71	86
Net effect from recognition (deferral) of deferred net revenues	0	0	0	(1)
Total consolidated net revenues	33	11	71	87
Reportable segments | King
Segment Reporting Information [Line Items]
Segment net revenues	652	536	1,896	1,587
Segment operating income	303	248	755	615
Net effect from recognition (deferral) of deferred net revenues	1	(4)	2	(1)
Total consolidated net revenues	651	540	1,894	1,588
Reportable segments | King | Americas
Segment Reporting Information [Line Items]
Segment net revenues	418	346	1,217	1,024
Net effect from recognition (deferral) of deferred net revenues	1	(4)	2	0
Total consolidated net revenues	417	350	1,215	1,024
Reportable segments | King | EMEA
Segment Reporting Information [Line Items]
Segment net revenues	163	136	484	406
Net effect from recognition (deferral) of deferred net revenues	0	0	(1)	(1)
Total consolidated net revenues	163	136	485	407
Reportable segments | King | Asia Pacific
Segment Reporting Information [Line Items]
Segment net revenues	71	54	195	157
Net effect from recognition (deferral) of deferred net revenues	0	0	1	0
Total consolidated net revenues	71	54	194	157
Reportable segments | King | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment net revenues	652	536	1,896	1,587
Reportable segments | King | Intersegment net revenues
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Reportable segments | King | Digital online channels
Segment Reporting Information [Line Items]
Segment net revenues	652	536	1,896	1,586
Net effect from recognition (deferral) of deferred net revenues	1	(4)	2	(1)
Total consolidated net revenues	651	540	1,894	1,587
Reportable segments | King | Retail channels
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	1
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	0	0	0	1
Reportable segments | King | Other
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	0	0	0	0
Reportable segments | King | Console
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	0	0	0	0
Reportable segments | King | PC
Segment Reporting Information [Line Items]
Segment net revenues	19	22	64	72
Net effect from recognition (deferral) of deferred net revenues	0	(1)	0	(1)
Total consolidated net revenues	19	23	64	73
Reportable segments | King | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment net revenues	633	514	1,832	1,515
Net effect from recognition (deferral) of deferred net revenues	1	(3)	2	0
Total consolidated net revenues	632	517	1,830	1,515
Reportable segments | King | Other
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	0	0	0	0
Non-reportable segments
Segment Reporting Information [Line Items]
Segment net revenues	109	65	303	232
Net effect from recognition (deferral) of deferred net revenues	1	0	9	(9)
Total consolidated net revenues	108	65	294	241
Non-reportable segments | Americas
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	0	0	0	0
Non-reportable segments | EMEA
Segment Reporting Information [Line Items]
Segment net revenues	109	65	303	232
Net effect from recognition (deferral) of deferred net revenues	1	0	9	(9)
Total consolidated net revenues	108	65	294	241
Non-reportable segments | Asia Pacific
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	0	0	0	0
Non-reportable segments | Digital online channels
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	0	0	0	0
Non-reportable segments | Retail channels
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	0	0	0	0
Non-reportable segments | Other
Segment Reporting Information [Line Items]
Segment net revenues	109	65	303	232
Net effect from recognition (deferral) of deferred net revenues	1	0	9	(9)
Total consolidated net revenues	108	65	294	241
Non-reportable segments | Console
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	0	0	0	0
Non-reportable segments | PC
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	0	0	0	0
Non-reportable segments | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	0	0	0	0
Non-reportable segments | Other
Segment Reporting Information [Line Items]
Segment net revenues	109	65	303	232
Net effect from recognition (deferral) of deferred net revenues	1	0	9	(9)
Total consolidated net revenues	108	65	294	241
Reconciliation items
Segment Reporting Information [Line Items]
Net effect from recognition (deferral) of deferred net revenues	190	187	773	306
Net effect from recognition (deferral) of deferred net revenues and related cost of revenues	154	150	562	169
Share-based compensation expense	(64)	(53)	(259)	(138)
Amortization of intangible assets	(2)	(16)	(8)	(62)
Restructuring and related costs	(3)	(9)	(46)	(39)
Reconciliation items | Other segments
Segment Reporting Information [Line Items]
Segment operating income	4	(20)	(12)	(27)
Elimination of intersegment revenues
Segment Reporting Information [Line Items]
Segment net revenues	(15)	(18)	(62)	(62)
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	(15)	(18)	(62)	(62)
Elimination of intersegment revenues | Americas
Segment Reporting Information [Line Items]
Segment net revenues	(9)	(11)	(36)	(31)
Net effect from recognition (deferral) of deferred net revenues	0	(1)	0	0
Total consolidated net revenues	(9)	(10)	(36)	(31)
Elimination of intersegment revenues | EMEA
Segment Reporting Information [Line Items]
Segment net revenues	(5)	(5)	(21)	(21)
Net effect from recognition (deferral) of deferred net revenues	0	1	0	0
Total consolidated net revenues	(5)	(6)	(21)	(21)
Elimination of intersegment revenues | Asia Pacific
Segment Reporting Information [Line Items]
Segment net revenues	(1)	(2)	(5)	(10)
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	(1)	(2)	(5)	(10)
Elimination of intersegment revenues | Digital online channels
Segment Reporting Information [Line Items]
Segment net revenues	(15)	(18)	(62)	(62)
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	(15)	(18)	(62)	(62)
Elimination of intersegment revenues | Retail channels
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	0	0	0	0
Elimination of intersegment revenues | Other
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	0	0	0	0
Elimination of intersegment revenues | Console
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	0	0	0	0
Elimination of intersegment revenues | PC
Segment Reporting Information [Line Items]
Segment net revenues	(15)	(18)	(62)	(62)
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	(15)	(18)	(62)	(62)
Elimination of intersegment revenues | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	0	0	0	0
Elimination of intersegment revenues | Other
Segment Reporting Information [Line Items]
Segment net revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	$ 0	$ 0	$ 0	$ 0