Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2017
Feb. 20, 2018
Jun. 30, 2017
Document and Entity Information      
Entity Registrant Name Activision Blizzard, Inc.    
Entity Central Index Key 0000718877    
Document Period End Date Dec. 31, 2017    
Document Type 10-K    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 42,587,342,045
Entity Common Stock, Shares Outstanding   758,631,663  
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY