Document and Entity Information - shares
9 Months Ended
Sep. 30, 2019
Oct. 15, 2019
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Trading Symbol ZNGA  
Entity Registrant Name Zynga Inc  
Entity Central Index Key 0001439404  
Current Fiscal Year End Date --12-31  
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  
Title of 12(b) Security Class A common stock  
Security Exchange Name NASDAQ  
Entity File Number 001-35375  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 42-1733483  
Entity Address, Address Line One 699 Eighth Street  
Entity Address, City or Town San Francisco  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94103  
Document Quarterly Report true  
Document Transition Report false  
City Area Code 855  
Local Phone Number 449-9642  
Entity Common Stock, Shares Outstanding   945,922,482