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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2019
Feb. 20, 2020
Jun. 30, 2019
Cover page.      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2019    
Document Transition Report false    
Entity File Number 1-15839    
Entity Registrant Name ACTIVISION BLIZZARD, INC.    
Entity Central Index Key 0000718877    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 95-4803544    
Entity Address, Address Line One 3100 Ocean Park Boulevard    
Entity Address, City or Town Santa Monica,    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 90405    
City Area Code 310    
Local Phone Number 255-2000    
Title of 12(b) Security Common Stock, par value $0.000001 per share    
Trading Symbol ATVI    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 35,743,039,830
Entity Common Stock, Shares Outstanding   769,221,524  
Documents Incorporated by Reference
Portions of the registrant’s definitive Proxy Statement, to be filed with the Securities and Exchange Commission with respect to the 2020 Annual Meeting of Shareholders which is expected to be held on June 11, 2020, are incorporated by reference into Part III of this Annual Report.