Restructuring - Schedule of Total Expected Pre-tax Restructuring Charges (Details) $ in Millions	Sep. 30, 2021 USD ($)
Restructuring Cost and Reserve [Line Items]
Total charges incurred through September 30, 2021	$ 272
Total charges expected as of September 30, 2021	275
Activision
Restructuring Cost and Reserve [Line Items]
Total charges incurred through September 30, 2021	33
Total charges expected as of September 30, 2021	33
Blizzard
Restructuring Cost and Reserve [Line Items]
Total charges incurred through September 30, 2021	186
Total charges expected as of September 30, 2021	187
King
Restructuring Cost and Reserve [Line Items]
Total charges incurred through September 30, 2021	20
Total charges expected as of September 30, 2021	20
Other segments
Restructuring Cost and Reserve [Line Items]
Total charges incurred through September 30, 2021	33
Total charges expected as of September 30, 2021	$ 35