| Cover Page - USD ($) $ in Billions | 12 Months Ended | ||
| Dec. 31, 2021 | Mar. 31, 2022 | Jun. 30, 2021 | |
| Document Information [Line Items] | |||
| Document Type | 10-K/A | ||
| Amendment Flag | true | ||
| Amendment Description | EXPLANATORY NOTE Zynga Inc. (the “Company,” “Zynga,” “we,” “us” or “our”) is filing this Amendment No. 1 on Form 10-K/A (this “Amendment”) to amend our Annual Report on Form 10-K for the year ended December 31, 2021, originally filed with the Securities and Exchange Commission (the “SEC”) on February 25, 2022 (the “Original 10-K”), to include the information required by Items 10 through 14 of Part III of Form 10-K. This information was previously omitted from the Original 10-K in reliance on General Instruction G(3) to Form 10-K, which permits the information in the above referenced items to be incorporated in the Form 10-K by reference from our definitive proxy statement if such statement is filed no later than 120 days after our fiscal year-end. We are filing this Amendment to include Part III information in our Form 10-K because a definitive proxy statement containing such information may not be filed by Zynga within 120 days after the end of the fiscal year covered by the Form 10-K. In accordance with Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), Part III, Items 10 through 14 of the Original 10-K are hereby amended and restated in their entirety. Additionally, in accordance with Rules 12b-15 and 13a-14 under the Exchange Act, we have amended Part IV, Item 15 to include currently dated certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 from our principal executive officer and principal financial officer. Since no new financial statements have been included in this Amendment and this Amendment does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4, and 5 of the certifications have been omitted. Similarly, since no financial statements have been included in this Amendment, certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 have been omitted. | ||
| Document Period End Date | Dec. 31, 2021 | ||
| Document Fiscal Period Focus | FY | ||
| Document Fiscal Year Focus | 2021 | ||
| Document Annual Report | true | ||
| Document Transition Report | false | ||
| 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 Interactive Data Current | Yes | ||
| Entity Filer Category | Large Accelerated Filer | ||
| Entity Emerging Growth Company | false | ||
| Entity Small Business | false | ||
| ICFR Auditor Attestation Flag | true | ||
| Entity Shell Company | false | ||
| Entity Incorporation, State or Country Code | DE | ||
| Entity File Number | 001-35375 | ||
| Entity Tax Identification Number | 42-1733483 | ||
| 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 Public Float | $ 10.9 | ||
| Documents Incorporated by Reference [Text Block] | DOCUMENTS INCORPORATED BY REFERENCE None. | ||
| Entity Common Stock, Shares Outstanding | 1,137,275,859 | ||
| Title of 12(b) Security | Class A common stock, par value $0.00000625 per share | ||
| Trading Symbol | ZNGA | ||
| Security Exchange Name | NASDAQ | ||
| Auditor Name | Ernst & Young | ||
| Auditor Firm ID | 42 | ||
| Auditor Location | San Jose, CA |
