Restructuring - Schedule of Total Expected Pre-tax Restructuring Charges (Details) $ in Millions	Mar. 31, 2021 USD ($)
Restructuring Cost and Reserve [Line Items]
Cumulative charges	$ 251
Total Charges Expected as of March 31, 2021	310
Activision
Restructuring Cost and Reserve [Line Items]
Cumulative charges	33
Total Charges Expected as of March 31, 2021	44
Blizzard
Restructuring Cost and Reserve [Line Items]
Cumulative charges	167
Total Charges Expected as of March 31, 2021	205
King
Restructuring Cost and Reserve [Line Items]
Cumulative charges	20
Total Charges Expected as of March 31, 2021	22
Other segments
Restructuring Cost and Reserve [Line Items]
Cumulative charges	31
Total Charges Expected as of March 31, 2021	$ 39