v3.3.1.900
Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Feb. 12, 2016
Jun. 30, 2015
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2015    
Document Fiscal Year Focus 2015    
Document Fiscal Period Focus FY    
Trading Symbol ZNGA    
Entity Registrant Name ZYNGA INC    
Entity Central Index Key 0001439404    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 2,230
Common Class A [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   728,915,069  
Common Class B [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   113,522,135  
Common Class C [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   20,517,472