v2.4.0.6
Document And Entity Information (USD $)
12 Months Ended
Dec. 31, 2012
Feb. 15, 2013
Common Class A [Member]
Feb. 15, 2013
Common Class B [Member]
Feb. 15, 2013
Common Class C [Member]
Document Type 10-K      
Amendment Flag false      
Document Period End Date Dec. 31, 2012      
Document Fiscal Period Focus FY      
Document Fiscal Year Focus 2012      
Entity Central Index Key 0001439404      
Current Fiscal Year End Date --12-31      
Entity Filer Category Large Accelerated Filer      
Entity Registrant Name ZYNGA INC      
Entity Common Stock, Shares Outstanding   598,057,857 166,918,231 20,517,472
Entity Current Reporting Status Yes      
Entity Voluntary Filers No      
Entity Well Known Seasoned Issuer No      
Entity Public Float $ 3,257,034,695