Operating Segments and Geographic Regions (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			3
Segment Reporting Information [Line Items]
Segment net revenues	$ 1,921	$ 2,078	$ 3,987	$ 3,600
Segment operating income	959	749	1,754	1,361
Net effect from recognition (deferral) of deferred net revenues	(375)	146	(584)	(119)
Total consolidated net revenues	2,296	1,932	4,571	3,719
Amortization of intangible assets	(2)	(14)	(7)	(47)
Restructuring and related costs	(13)	(6)	(43)	(29)
Interest and other expense (income), net	(43)	22	(14)	30
Income before income tax expense	1,002	727	1,768	1,331
Long-lived assets	394		394		$ 453
Americas
Segment Reporting Information [Line Items]
Segment net revenues	1,128	1,236	2,313	2,041
Net effect from recognition (deferral) of deferred net revenues	(218)	124	(340)	(19)
Total consolidated net revenues	1,346	1,112	2,653	2,060
Long-lived assets	236		236		270
EMEA
Segment Reporting Information [Line Items]
Segment net revenues	562	631	1,230	1,096
Net effect from recognition (deferral) of deferred net revenues	(133)	16	(196)	(85)
Total consolidated net revenues	695	615	1,426	1,181
Long-lived assets	142		142		166
Asia Pacific
Segment Reporting Information [Line Items]
Segment net revenues	231	211	444	463
Net effect from recognition (deferral) of deferred net revenues	(24)	6	(48)	(15)
Total consolidated net revenues	255	$ 205	492	$ 478
Long-lived assets	$ 16		$ 16		$ 17
US | Geographic Concentration Risk | Revenues
Segment Reporting Information [Line Items]
Percentage of concentration risk	51.00%	51.00%	51.00%	50.00%
UK | Geographic Concentration Risk | Revenues
Segment Reporting Information [Line Items]
Percentage of concentration risk	10.00%	11.00%	10.00%	10.00%
Digital online channels
Segment Reporting Information [Line Items]
Segment net revenues	$ 1,741	$ 1,821	$ 3,606	$ 3,176
Net effect from recognition (deferral) of deferred net revenues	(285)	230	(425)	146
Total consolidated net revenues	2,026	1,591	4,031	3,030
Retail channels
Segment Reporting Information [Line Items]
Segment net revenues	44	86	119	135
Net effect from recognition (deferral) of deferred net revenues	(93)	(82)	(167)	(255)
Total consolidated net revenues	137	168	286	390
Other
Segment Reporting Information [Line Items]
Segment net revenues	136	171	262	289
Net effect from recognition (deferral) of deferred net revenues	3	(2)	8	(10)
Total consolidated net revenues	133	173	254	299
Console
Segment Reporting Information [Line Items]
Segment net revenues	495	713	1,121	1,077
Net effect from recognition (deferral) of deferred net revenues	(245)	58	(417)	(172)
Total consolidated net revenues	740	655	1,538	1,249
PC
Segment Reporting Information [Line Items]
Segment net revenues	500	519	1,076	998
Net effect from recognition (deferral) of deferred net revenues	(128)	37	(172)	17
Total consolidated net revenues	628	482	1,248	981
Mobile and ancillary
Segment Reporting Information [Line Items]
Segment net revenues	790	675	1,528	1,236
Net effect from recognition (deferral) of deferred net revenues	(5)	53	(3)	46
Total consolidated net revenues	795	622	1,531	1,190
Other
Segment Reporting Information [Line Items]
Segment net revenues	136	171	262	289
Net effect from recognition (deferral) of deferred net revenues	3	(2)	8	(10)
Total consolidated net revenues	133	173	254	299
Reportable segments
Segment Reporting Information [Line Items]
Segment net revenues	1,857	2,007	3,840	3,477
Segment operating income	752	974	1,605	1,510
Reportable segments | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment net revenues	1,835	1,979	3,793	3,433
Reportable segments | Intersegment net revenues
Segment Reporting Information [Line Items]
Segment net revenues	22	28	47	44
Reportable segments | Activision
Segment Reporting Information [Line Items]
Segment net revenues	789	993	1,680	1,512
Segment operating income	363	559	804	743
Net effect from recognition (deferral) of deferred net revenues	(293)	123	(524)	(138)
Total consolidated net revenues	1,082	870	2,204	1,650
Reportable segments | Activision | Americas
Segment Reporting Information [Line Items]
Segment net revenues	523	648	1,117	974
Net effect from recognition (deferral) of deferred net revenues	(179)	100	(310)	(46)
Total consolidated net revenues	702	548	1,427	1,020
Reportable segments | Activision | EMEA
Segment Reporting Information [Line Items]
Segment net revenues	188	265	422	408
Net effect from recognition (deferral) of deferred net revenues	(95)	17	(171)	(79)
Total consolidated net revenues	283	248	593	487
Reportable segments | Activision | Asia Pacific
Segment Reporting Information [Line Items]
Segment net revenues	78	80	141	130
Net effect from recognition (deferral) of deferred net revenues	(19)	6	(43)	(13)
Total consolidated net revenues	97	74	184	143
Reportable segments | Activision | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment net revenues	789	993	1,680	1,512
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	736	886	1,539	1,342
Net effect from recognition (deferral) of deferred net revenues	(202)	206	(363)	114
Total consolidated net revenues	938	680	1,902	1,228
Reportable segments | Activision | Retail channels
Segment Reporting Information [Line Items]
Segment net revenues	37	80	110	123
Net effect from recognition (deferral) of deferred net revenues	(91)	(83)	(161)	(252)
Total consolidated net revenues	128	163	271	375
Reportable segments | Activision | Other
Segment Reporting Information [Line Items]
Segment net revenues	16	27	31	47
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	16	27	31	47
Reportable segments | Activision | Console
Segment Reporting Information [Line Items]
Segment net revenues	472	676	1,079	1,021
Net effect from recognition (deferral) of deferred net revenues	(245)	53	(411)	(169)
Total consolidated net revenues	717	623	1,490	1,190
Reportable segments | Activision | PC
Segment Reporting Information [Line Items]
Segment net revenues	140	167	280	256
Net effect from recognition (deferral) of deferred net revenues	(52)	21	(112)	(17)
Total consolidated net revenues	192	146	392	273
Reportable segments | Activision | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment net revenues	161	123	290	188
Net effect from recognition (deferral) of deferred net revenues	4	49	(1)	48
Total consolidated net revenues	157	74	291	140
Reportable segments | Activision | Other
Segment Reporting Information [Line Items]
Segment net revenues	16	27	31	47
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	16	27	31	47
Reportable segments | Blizzard
Segment Reporting Information [Line Items]
Segment net revenues	433	461	916	914
Segment operating income	141	203	349	400
Net effect from recognition (deferral) of deferred net revenues	(82)	21	(69)	25
Total consolidated net revenues	515	440	985	889
Reportable segments | Blizzard | Americas
Segment Reporting Information [Line Items]
Segment net revenues	209	235	424	409
Net effect from recognition (deferral) of deferred net revenues	(36)	19	(31)	22
Total consolidated net revenues	245	216	455	387
Reportable segments | Blizzard | EMEA
Segment Reporting Information [Line Items]
Segment net revenues	134	142	308	267
Net effect from recognition (deferral) of deferred net revenues	(40)	1	(33)	5
Total consolidated net revenues	174	141	341	262
Reportable segments | Blizzard | Asia Pacific
Segment Reporting Information [Line Items]
Segment net revenues	90	84	184	238
Net effect from recognition (deferral) of deferred net revenues	(6)	1	(5)	(2)
Total consolidated net revenues	96	83	189	240
Reportable segments | Blizzard | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment net revenues	411	433	869	870
Reportable segments | Blizzard | Intersegment net revenues
Segment Reporting Information [Line Items]
Segment net revenues	22	28	47	44
Reportable segments | Blizzard | Digital online channels
Segment Reporting Information [Line Items]
Segment net revenues	392	410	870	827
Net effect from recognition (deferral) of deferred net revenues	(80)	20	(63)	29
Total consolidated net revenues	472	390	933	798
Reportable segments | Blizzard | Retail channels
Segment Reporting Information [Line Items]
Segment net revenues	7	6	9	12
Net effect from recognition (deferral) of deferred net revenues	(2)	1	(6)	(3)
Total consolidated net revenues	9	5	15	15
Reportable segments | Blizzard | Other
Segment Reporting Information [Line Items]
Segment net revenues	34	45	37	75
Net effect from recognition (deferral) of deferred net revenues	0	0	0	(1)
Total consolidated net revenues	34	45	37	76
Reportable segments | Blizzard | Console
Segment Reporting Information [Line Items]
Segment net revenues	23	37	42	56
Net effect from recognition (deferral) of deferred net revenues	0	5	(6)	(3)
Total consolidated net revenues	23	32	48	59
Reportable segments | Blizzard | PC
Segment Reporting Information [Line Items]
Segment net revenues	360	354	798	736
Net effect from recognition (deferral) of deferred net revenues	(76)	15	(60)	34
Total consolidated net revenues	436	339	858	702
Reportable segments | Blizzard | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment net revenues	16	25	39	47
Net effect from recognition (deferral) of deferred net revenues	(6)	1	(3)	(5)
Total consolidated net revenues	22	24	42	52
Reportable segments | Blizzard | Other
Segment Reporting Information [Line Items]
Segment net revenues	34	45	37	75
Net effect from recognition (deferral) of deferred net revenues	0	0	0	(1)
Total consolidated net revenues	34	45	37	76
Reportable segments | King
Segment Reporting Information [Line Items]
Segment net revenues	635	553	1,244	1,051
Segment operating income	248	212	452	367
Net effect from recognition (deferral) of deferred net revenues	(3)	4	1	3
Total consolidated net revenues	638	549	1,243	1,048
Reportable segments | King | Americas
Segment Reporting Information [Line Items]
Segment net revenues	409	367	799	679
Net effect from recognition (deferral) of deferred net revenues	(3)	5	1	5
Total consolidated net revenues	412	362	798	674
Reportable segments | King | EMEA
Segment Reporting Information [Line Items]
Segment net revenues	161	135	322	269
Net effect from recognition (deferral) of deferred net revenues	(1)	0	0	(2)
Total consolidated net revenues	162	135	322	271
Reportable segments | King | Asia Pacific
Segment Reporting Information [Line Items]
Segment net revenues	65	51	123	103
Net effect from recognition (deferral) of deferred net revenues	1	(1)	0	0
Total consolidated net revenues	64	52	123	103
Reportable segments | King | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment net revenues	635	553	1,244	1,051
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	635	553	1,244	1,051
Net effect from recognition (deferral) of deferred net revenues	(3)	4	1	3
Total consolidated net revenues	638	549	1,243	1,048
Reportable segments | King | 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
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	22	26	45	50
Net effect from recognition (deferral) of deferred net revenues	0	1	0	0
Total consolidated net revenues	22	25	45	50
Reportable segments | King | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment net revenues	613	527	1,199	1,001
Net effect from recognition (deferral) of deferred net revenues	(3)	3	1	3
Total consolidated net revenues	616	524	1,198	998
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	86	99	194	167
Net effect from recognition (deferral) of deferred net revenues	3	(2)	8	(9)
Total consolidated net revenues	83	101	186	176
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	86	99	194	167
Net effect from recognition (deferral) of deferred net revenues	3	(2)	8	(9)
Total consolidated net revenues	83	101	186	176
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	86	99	194	167
Net effect from recognition (deferral) of deferred net revenues	3	(2)	8	(9)
Total consolidated net revenues	83	101	186	176
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	86	99	194	167
Net effect from recognition (deferral) of deferred net revenues	3	(2)	8	(9)
Total consolidated net revenues	83	101	186	176
Reconciliation items
Segment Reporting Information [Line Items]
Net effect from recognition (deferral) of deferred net revenues	375	(146)	584	119
Net effect from recognition (deferral) of deferred net revenues and related cost of revenues	276	(152)	408	19
Share-based compensation expense	(43)	(42)	(194)	(85)
Amortization of intangible assets	(2)	(14)	(7)	(47)
Restructuring and related costs	(13)	(6)	(43)	(29)
Reconciliation items | Other segments
Segment Reporting Information [Line Items]
Segment operating income	(11)	(11)	(15)	(7)
Elimination of intersegment revenues
Segment Reporting Information [Line Items]
Segment net revenues	(22)	(28)	(47)	(44)
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	(22)	(28)	(47)	(44)
Elimination of intersegment revenues | Americas
Segment Reporting Information [Line Items]
Segment net revenues	(13)	(14)	(27)	(21)
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	(13)	(14)	(27)	(21)
Elimination of intersegment revenues | EMEA
Segment Reporting Information [Line Items]
Segment net revenues	(7)	(10)	(16)	(15)
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	(7)	(10)	(16)	(15)
Elimination of intersegment revenues | Asia Pacific
Segment Reporting Information [Line Items]
Segment net revenues	(2)	(4)	(4)	(8)
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	(2)	(4)	(4)	(8)
Elimination of intersegment revenues | Digital online channels
Segment Reporting Information [Line Items]
Segment net revenues	(22)	(28)	(47)	(44)
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	(22)	(28)	(47)	(44)
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	(22)	(28)	(47)	(44)
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Total consolidated net revenues	(22)	(28)	(47)	(44)
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