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Business and Basis of Presentation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended 6 Months Ended
Apr. 01, 2021
Mar. 31, 2021
Apr. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2020
Date of incorporation           Oct. 04, 2012    
Proceeds from issuance of common stock upon initial public offering, net of offering costs           $ 0.0 $ 439.6  
Conversion of convertible preferred stock to common stock in connection with the initial public offering (in shares)     223,000,000          
Stock based compensation expense       $ 59.2 $ 54.3 $ 123.0 221.8  
IPO Related Expense                
Stock based compensation expense   $ 148.5         $ 148.5  
Additional Paid-in Capital                
Conversion of convertible preferred stock to common stock in connection with the initial public offering     $ 1,400.0          
IPO                
Issuance of common stock in connection with the initial public offering, net of offering costs (in shares) 26,300,000              
Sale of stock issue price per share (in dollars per share) $ 18.00              
Proceeds from issuance of common stock upon initial public offering, net of offering costs $ 438.7              
Payments of deferred offering costs $ 11.0              
Deferred offering costs               $ 0.9