Fair Value Measurements (Details 4) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment charges - nonrecurring	$ 0	$ 0	$ 0	$ 0

Impairment charges related to assets that are measured on non-recurring basis.

No definition available.

Name:	atvi_ImpairmentChargesNonRecurring
Namespace Prefix:	atvi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration