Restructuring - Total Restructuring and Related Costs by Segment (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended		18 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	$ 6		$ 22	$ 29	$ 79
2019 Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	4	$ 23	22	27	79	$ 164
2019 Restructuring | Activision
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	2		2	4	11	23
2019 Restructuring | Blizzard
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	2		13	23	39	96
2019 Restructuring | King
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	(1)		6	(2)	13	18
2019 Restructuring | Other segments
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	$ 1		$ 1	$ 2	$ 16	$ 27