Restructuring - Total Restructuring and Related Costs by Segment (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended		21 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	$ 9			$ 24	$ 39	$ 104
2019 Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	9	$ 4	$ 23	24	36	104	$ 173
2019 Restructuring | Activision
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	1			1	5	12	24
2019 Restructuring | Blizzard
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	7			12	30	52	103
2019 Restructuring | King
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	1			4	(1)	17	19
2019 Restructuring | Other segments
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	$ 0			$ 7	$ 2	$ 23	$ 27