Net Income (Loss) Per Share of Common Stock - Additional Information (Detail)		6 Months Ended
	May 02, 2018 Voting_Rights shares	Jun. 30, 2019 shares	Dec. 31, 2018 shares
Earnings Per Share Diluted [Line Items]
Conversion of stock description		On May 2, 2018, our founder, Mark Pincus, elected to convert certain outstanding shares of Class B common stock and all outstanding shares of Class C common stock controlled by Mr. Pincus and an affiliated investment entity into an equivalent number of shares of Class A common stock. As a result of Mr. Pincus’ conversion, the remaining shares of Class B common stock represented less than 10% of the total voting power of all Zynga stockholders and, accordingly, each remaining outstanding share of Class B common stock automatically converted into one share of Class A common stock. Each Zynga stockholder now has one vote per share on all matters subject to stockholder vote. Following the conversion, no shares of Class B or Class C common stock are outstanding and the total number of authorized shares of capital stock will be reduced to account for the elimination of the Class B and Class C common stock. Accordingly, beginning in the second quarter of 2018, the Company calculated basic and dilutive net income (loss) per share under a single-class method.
Voting rights per share | Voting_Rights	1
Common Class A [Member]
Earnings Per Share Diluted [Line Items]
Number of shares issued upon conversion of common stock	1
Common stock, shares outstanding		940,224,000	861,111,000
Common Class B [Member]
Earnings Per Share Diluted [Line Items]
Maximum percentage of common stock outstanding required for conversion	10.00%
Common stock, shares outstanding	0
Common Class C [Member]
Earnings Per Share Diluted [Line Items]
Common stock, shares outstanding	0