Restructuring - Total Restructuring and Related Costs by Segment (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	$ 24	$ 22	$ 57	$ 0	$ 104	$ 0
Activision
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	1				12
Blizzard
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	12				52
King
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	4				17
Other segments
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	7				$ 23
Cost of revenues-product sales: Product costs
Restructuring Cost and Reserve [Line Items]
Inventory write-down	$ 4