Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Jul. 15, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
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 Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity File Number 001-35375  
Entity Tax Identification Number 421733483  
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  
City Area Code 855  
Local Phone Number 449-9642  
Entity Common Stock, Shares Outstanding   941,634,893