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Stockholders' Equity - Schedule of Share Based Compensation Stock Option Activity (Detail) - Zynga Stock Options [Member]
$ / shares in Units, shares in Millions, $ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Stock Options Outstanding, Beginning balance | shares 30.1  
Stock Options, Exercised | shares (2.0)  
Stock Options Outstanding, Ending balance | shares 28.1 30.1
Outstanding Options, Weighted Average Exercise Price (per option), Beginning Balance | $ / shares $ 3.46  
Weighted Average Exercise Price (per option), Exercised | $ / shares 2.96  
Outstanding Options, Weighted Average Exercise Price (per option), Ending Balance | $ / shares $ 3.49 $ 3.46
Aggregate Intrinsic Value of Stock Options Outstanding | $ $ 201.0 $ 193.1
Outstanding Options, Weighted Average Contractual Term (in years) 5 years 11 months 26 days 6 years 5 months 4 days