Restructuring - Total Restructuring and Related Costs by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	$ 13	$ 6	$ 43	$ 29
2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	17	4	44	27
Activision | 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	0	2	1	4
Blizzard | 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	15	2	38	23
King | 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	0	(1)	1	(2)
Other segments | 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	$ 2	$ 1	$ 4	$ 2