Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies [Line Items]
Standby letter of credit	$ 15	$ 15
European subsidiary
Commitments and Contingencies [Line Items]
Standby letter of credit	$ 7	$ 7

An irrevocable undertaking (typically by a financial institution) to guarantee payment of a specified financial obligation.

No definition available.

Name:	atvi_StandbyLettersOfCredit
Namespace Prefix:	atvi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant