Stockholders' Equity - Common Stock Reserved for Future Issuance (Detail) shares in Thousands	Dec. 31, 2016 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, Non-option equity instruments, Outstanding, Number	273,770
2011 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, Non-option equity instruments, Outstanding, Number	99,447
2011 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, Non-option equity instruments, Outstanding, Number	78,013
Zynga Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, Non-option equity instruments, Outstanding, Number	36,858
Restricted Stock Units (ZSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, Non-option equity instruments, Outstanding, Number	59,452