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Related Party Transactions (Details) (Vivendi Games)
In Millions, unless otherwise specified
May 28, 2014
Vivendi Games
  
Stock Purchase Agreement [Line Items]  
Stock Sold by Vivendi, Shares 41atvi_StockSoldByShareholderShares
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= atvi_VivendiGamesMember