Operating Segments and Geographic Region (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) segment	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			3
Segment Reporting Information [Line Items]
Segment revenues	$ 1,767	$ 1,214	$ 5,368	$ 3,679
Operating income	778	247	2,139	1,153
Net effect from recognition (deferral) of deferred net revenues	(187)	(68)	(306)	(824)
Net revenues	1,954	1,282	5,674	4,503
Amortization of intangible assets	(16)	(50)	(62)	(152)
Restructuring costs	(9)	(24)	(39)	(104)
Interest and other expense (income), net (Note 12)	25	(2)	55	(33)
Loss on extinguishment of debt	31	0	31	0
Income before income tax expense	722	249	2,053	1,186
Long-lived assets	459		459		$ 485
Digital online channels
Segment Reporting Information [Line Items]
Segment revenues	1,605	975	4,781	3,049
Net effect from recognition (deferral) of deferred net revenues	(148)	(39)	(1)	(444)
Net revenues	1,753	1,014	4,782	3,493
Retail channels
Segment Reporting Information [Line Items]
Segment revenues	78	64	214	226
Net effect from recognition (deferral) of deferred net revenues	(39)	(29)	(295)	(373)
Net revenues	117	93	509	599
Other
Segment Reporting Information [Line Items]
Segment revenues	84	175	373	404
Net effect from recognition (deferral) of deferred net revenues	0	0	(10)	(7)
Net revenues	84	175	383	411
Console
Segment Reporting Information [Line Items]
Segment revenues	566	196	1,643	735
Net effect from recognition (deferral) of deferred net revenues	(129)	(45)	(301)	(589)
Net revenues	695	241	1,944	1,324
PC
Segment Reporting Information [Line Items]
Segment revenues	469	320	1,467	978
Net effect from recognition (deferral) of deferred net revenues	(45)	(21)	(27)	(218)
Net revenues	514	341	1,494	1,196
Mobile and ancillary
Segment Reporting Information [Line Items]
Segment revenues	648	523	1,885	1,562
Net effect from recognition (deferral) of deferred net revenues	(13)	(2)	32	(10)
Net revenues	661	525	1,853	1,572
Other
Segment Reporting Information [Line Items]
Segment revenues	84	175	373	404
Net effect from recognition (deferral) of deferred net revenues	0	0	(10)	(7)
Net revenues	84	175	383	411
Americas
Segment Reporting Information [Line Items]
Segment revenues	1,041	622	3,082	1,937
Net effect from recognition (deferral) of deferred net revenues	(86)	(33)	(106)	(469)
Net revenues	1,127	$ 655	3,188	$ 2,406
Long-lived assets	$ 269		$ 269		322
US | Revenues | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Revenues as a percentage of consolidated net revenues	50.00%	46.00%	50.00%	48.00%
EMEA
Segment Reporting Information [Line Items]
Segment revenues	$ 514	$ 426	$ 1,611	$ 1,240
Net effect from recognition (deferral) of deferred net revenues	(75)	(26)	(159)	(285)
Net revenues	589	$ 452	1,770	$ 1,525
Long-lived assets	$ 174		$ 174		142
UK | Revenues | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Revenues as a percentage of consolidated net revenues	9.00%	13.00%	10.00%	10.00%
Asia Pacific
Segment Reporting Information [Line Items]
Segment revenues	$ 212	$ 166	$ 675	$ 502
Net effect from recognition (deferral) of deferred net revenues	(26)	(9)	(41)	(70)
Net revenues	238	175	716	572
Long-lived assets	16		16		$ 21
Reportable segments
Segment Reporting Information [Line Items]
Segment revenues	1,720	1,103	5,198	3,443
Operating income	726	294	2,236	900
Reportable segments | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment revenues	1,702	1,101	5,136	3,434
Reportable segments | Intersegment net revenues
Segment Reporting Information [Line Items]
Segment revenues	18	2	62	9
Reportable segments | Activision
Segment Reporting Information [Line Items]
Segment revenues	773	209	2,285	794
Operating income	345	26	1,088	153
Net effect from recognition (deferral) of deferred net revenues	(171)	(43)	(309)	(648)
Net revenues	944	252	2,594	1,442
Reportable segments | Activision | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment revenues	773	209	2,285	794
Reportable segments | Activision | Intersegment net revenues
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Reportable segments | Activision | Digital online channels
Segment Reporting Information [Line Items]
Segment revenues	696	163	2,038	609
Net effect from recognition (deferral) of deferred net revenues	(130)	(16)	(16)	(285)
Net revenues	826	179	2,054	894
Reportable segments | Activision | Retail channels
Segment Reporting Information [Line Items]
Segment revenues	69	46	192	185
Net effect from recognition (deferral) of deferred net revenues	(41)	(27)	(293)	(363)
Net revenues	110	73	485	548
Reportable segments | Activision | Other
Segment Reporting Information [Line Items]
Segment revenues	8	0	55	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	8	0	55	0
Reportable segments | Activision | Console
Segment Reporting Information [Line Items]
Segment revenues	539	178	1,560	659
Net effect from recognition (deferral) of deferred net revenues	(125)	(36)	(295)	(563)
Net revenues	664	214	1,855	1,222
Reportable segments | Activision | PC
Segment Reporting Information [Line Items]
Segment revenues	117	22	373	120
Net effect from recognition (deferral) of deferred net revenues	(35)	(7)	(50)	(84)
Net revenues	152	29	423	204
Reportable segments | Activision | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment revenues	109	9	297	15
Net effect from recognition (deferral) of deferred net revenues	(11)	0	36	(1)
Net revenues	120	9	261	16
Reportable segments | Activision | Other
Segment Reporting Information [Line Items]
Segment revenues	8	0	55	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	8	0	55	0
Reportable segments | Activision | Americas
Segment Reporting Information [Line Items]
Segment revenues	518	121	1,491	462
Net effect from recognition (deferral) of deferred net revenues	(77)	(20)	(124)	(390)
Net revenues	595	141	1,615	852
Reportable segments | Activision | EMEA
Segment Reporting Information [Line Items]
Segment revenues	195	63	604	252
Net effect from recognition (deferral) of deferred net revenues	(68)	(16)	(146)	(205)
Net revenues	263	79	750	457
Reportable segments | Activision | Asia Pacific
Segment Reporting Information [Line Items]
Segment revenues	60	25	190	80
Net effect from recognition (deferral) of deferred net revenues	(26)	(7)	(39)	(53)
Net revenues	86	32	229	133
Reportable segments | Blizzard
Segment Reporting Information [Line Items]
Segment revenues	411	394	1,326	1,122
Operating income	133	74	533	204
Net effect from recognition (deferral) of deferred net revenues	(12)	(23)	13	(167)
Net revenues	423	417	1,313	1,289
Reportable segments | Blizzard | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment revenues	393	392	1,264	1,113
Reportable segments | Blizzard | Intersegment net revenues
Segment Reporting Information [Line Items]
Segment revenues	18	2	62	9
Reportable segments | Blizzard | Digital online channels
Segment Reporting Information [Line Items]
Segment revenues	391	314	1,219	922
Net effect from recognition (deferral) of deferred net revenues	(14)	(21)	16	(159)
Net revenues	405	335	1,203	1,081
Reportable segments | Blizzard | Retail channels
Segment Reporting Information [Line Items]
Segment revenues	9	18	21	41
Net effect from recognition (deferral) of deferred net revenues	2	(2)	(2)	(10)
Net revenues	7	20	23	51
Reportable segments | Blizzard | Other
Segment Reporting Information [Line Items]
Segment revenues	11	62	86	159
Net effect from recognition (deferral) of deferred net revenues	0	0	(1)	2
Net revenues	11	62	87	157
Reportable segments | Blizzard | Console
Segment Reporting Information [Line Items]
Segment revenues	27	18	83	76
Net effect from recognition (deferral) of deferred net revenues	(4)	(9)	(6)	(26)
Net revenues	31	27	89	102
Reportable segments | Blizzard | PC
Segment Reporting Information [Line Items]
Segment revenues	348	272	1,084	776
Net effect from recognition (deferral) of deferred net revenues	(9)	(14)	24	(133)
Net revenues	357	286	1,060	909
Reportable segments | Blizzard | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment revenues	25	42	73	111
Net effect from recognition (deferral) of deferred net revenues	1	0	(4)	(10)
Net revenues	24	42	77	121
Reportable segments | Blizzard | Other
Segment Reporting Information [Line Items]
Segment revenues	11	62	86	159
Net effect from recognition (deferral) of deferred net revenues	0	0	(1)	2
Net revenues	11	62	87	157
Reportable segments | Blizzard | Americas
Segment Reporting Information [Line Items]
Segment revenues	188	193	598	533
Net effect from recognition (deferral) of deferred net revenues	(4)	(11)	18	(80)
Net revenues	192	204	580	613
Reportable segments | Blizzard | EMEA
Segment Reporting Information [Line Items]
Segment revenues	123	114	390	329
Net effect from recognition (deferral) of deferred net revenues	(8)	(10)	(3)	(71)
Net revenues	131	124	393	400
Reportable segments | Blizzard | Asia Pacific
Segment Reporting Information [Line Items]
Segment revenues	100	87	338	260
Net effect from recognition (deferral) of deferred net revenues	0	(2)	(2)	(16)
Net revenues	100	89	340	276
Reportable segments | King
Segment Reporting Information [Line Items]
Segment revenues	536	500	1,587	1,527
Operating income	248	194	615	543
Net effect from recognition (deferral) of deferred net revenues	(4)	(2)	(1)	0
Net revenues	540	502	1,588	1,527
Reportable segments | King | Net revenues from external customers
Segment Reporting Information [Line Items]
Segment revenues	536	500	1,587	1,527
Reportable segments | King | Intersegment net revenues
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Reportable segments | King | Digital online channels
Segment Reporting Information [Line Items]
Segment revenues	536	500	1,586	1,527
Net effect from recognition (deferral) of deferred net revenues	(4)	(2)	(1)	0
Net revenues	540	502	1,587	1,527
Reportable segments | King | Retail channels
Segment Reporting Information [Line Items]
Segment revenues	0	0	1	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	1	0
Reportable segments | King | Other
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	0	0
Reportable segments | King | Console
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	0	0
Reportable segments | King | PC
Segment Reporting Information [Line Items]
Segment revenues	22	28	72	91
Net effect from recognition (deferral) of deferred net revenues	(1)	0	(1)	(1)
Net revenues	23	28	73	92
Reportable segments | King | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment revenues	514	472	1,515	1,436
Net effect from recognition (deferral) of deferred net revenues	(3)	(2)	0	1
Net revenues	517	474	1,515	1,435
Reportable segments | King | Other
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	0	0
Reportable segments | King | Americas
Segment Reporting Information [Line Items]
Segment revenues	346	309	1,024	947
Net effect from recognition (deferral) of deferred net revenues	(4)	(2)	0	1
Net revenues	350	311	1,024	946
Reportable segments | King | EMEA
Segment Reporting Information [Line Items]
Segment revenues	136	137	406	417
Net effect from recognition (deferral) of deferred net revenues	0	0	(1)	0
Net revenues	136	137	407	417
Reportable segments | King | Asia Pacific
Segment Reporting Information [Line Items]
Segment revenues	54	54	157	163
Net effect from recognition (deferral) of deferred net revenues	0	0	0	(1)
Net revenues	54	54	157	164
Non-reportable segments
Segment Reporting Information [Line Items]
Segment revenues	65	113	232	245
Net effect from recognition (deferral) of deferred net revenues	0	0	(9)	(9)
Net revenues	65	113	241	254
Non-reportable segments | Digital online channels
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	0	0
Non-reportable segments | Retail channels
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	0	0
Non-reportable segments | Other
Segment Reporting Information [Line Items]
Segment revenues	65	113	232	245
Net effect from recognition (deferral) of deferred net revenues	0	0	(9)	(9)
Net revenues	65	113	241	254
Non-reportable segments | Console
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	0	0
Non-reportable segments | PC
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	0	0
Non-reportable segments | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	0	0
Non-reportable segments | Other
Segment Reporting Information [Line Items]
Segment revenues	65	113	232	245
Net effect from recognition (deferral) of deferred net revenues	0	0	(9)	(9)
Net revenues	65	113	241	254
Non-reportable segments | Americas
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	0	0
Non-reportable segments | EMEA
Segment Reporting Information [Line Items]
Segment revenues	65	113	232	245
Net effect from recognition (deferral) of deferred net revenues	0	0	(9)	(9)
Net revenues	65	113	241	254
Non-reportable segments | Asia Pacific
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	0	0
Elimination of intersegment revenues
Segment Reporting Information [Line Items]
Segment revenues	(18)	(2)	(62)	(9)
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	(18)	(2)	(62)	(9)
Elimination of intersegment revenues | Digital online channels
Segment Reporting Information [Line Items]
Segment revenues	(18)	(2)	(62)	(9)
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	(18)	(2)	(62)	(9)
Elimination of intersegment revenues | Retail channels
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	0	0
Elimination of intersegment revenues | Other
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	0	0
Elimination of intersegment revenues | Console
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	0	0
Elimination of intersegment revenues | PC
Segment Reporting Information [Line Items]
Segment revenues	(18)	(2)	(62)	(9)
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	(18)	(2)	(62)	(9)
Elimination of intersegment revenues | Mobile and ancillary
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	0	0
Elimination of intersegment revenues | Other
Segment Reporting Information [Line Items]
Segment revenues	0	0	0	0
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	0	0	0	0
Elimination of intersegment revenues | Americas
Segment Reporting Information [Line Items]
Segment revenues	(11)	(1)	(31)	(5)
Net effect from recognition (deferral) of deferred net revenues	(1)	0	0	0
Net revenues	(10)	(1)	(31)	(5)
Elimination of intersegment revenues | EMEA
Segment Reporting Information [Line Items]
Segment revenues	(5)	(1)	(21)	(3)
Net effect from recognition (deferral) of deferred net revenues	1	0	0	0
Net revenues	(6)	(1)	(21)	(3)
Elimination of intersegment revenues | Asia Pacific
Segment Reporting Information [Line Items]
Segment revenues	(2)	0	(10)	(1)
Net effect from recognition (deferral) of deferred net revenues	0	0	0	0
Net revenues	(2)	0	(10)	(1)
Reconciling items
Segment Reporting Information [Line Items]
Net effect from recognition (deferral) of deferred net revenues	187	68	306	824
Net effect from recognition (deferral) of deferred net revenues and related cost of revenues	150	53	169	629
Share-based compensation expense	(53)	(27)	(138)	(127)
Amortization of intangible assets	(16)	(50)	(62)	(151)
Restructuring costs	(9)	(28)	(39)	(108)
Reconciling items | Other segments
Segment Reporting Information [Line Items]
Operating income	$ (20)	$ 5	$ (27)	$ 10