Restructuring - Total Restructuring and Related Costs by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	$ 3	$ 9	$ 46	$ 39
2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	4	9	48	36
Activision | 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	0	1	1	5
Blizzard | 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	4	7	42	30
King | 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	0	1	1	(1)
Other segments | 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	$ 0	$ 0	$ 4	$ 2