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Stockholders' Equity - Additional Information (Details)
$ / shares in Units, $ in Millions
 6 Months Ended
Jan. 01, 2024
shares
Jun. 30, 2024
USD ($)
Vote
$ / shares
shares
Jun. 30, 2023
USD ($)
$ / shares
Dec. 31, 2023
$ / shares
shares
Class Of Stock [Line Items]        
Preferred Stock, Shares Authorized   10,000,000   10,000,000
Preferred Stock, Par or Stated Value Per Share | $ / shares   $ 0.00001   $ 0.00001
Conversion, percent threshold   10.00%    
Common stock reserved for issuance (in shares)   108,251,546   100,282,213
Shares Available for Grant, Increase in authorized shares   15,575,577    
Intrinsic value of options exercised | $   $ 88.2 $ 144.7  
Weighted average grant date fair value per share of options granted | $ / shares   $ 0 $ 0  
Shares early exercised and repurchase   67,525   135,013
Unrecognized stock-based compensation expense | $   $ 585.0    
Unrecognized stock-based compensation expense, weighted-average period   1 year 9 months 18 days    
Common Class A [Member]        
Class Of Stock [Line Items]        
Common Stock, Shares Authorized   1,000,000,000   1,000,000,000
Common stock, voting rights, votes per share | Vote   1    
Common Stock, Par Value | $ / shares   $ 0.00001   $ 0.00001
Common Class B [Member]        
Class Of Stock [Line Items]        
Common Stock, Shares Authorized   500,000,000   500,000,000
Common stock, voting rights, votes per share | Vote   10    
Common Stock, Par Value | $ / shares   $ 0.00001   $ 0.00001
2021 Plan [Member]        
Class Of Stock [Line Items]        
Shares Available for Grant, Increase in authorized shares 15,575,577      
2021 Plan [Member] | Common Class A [Member]        
Class Of Stock [Line Items]        
Common stock reserved for issuance (in shares)   25,812,876    
2021 Employee Stock Purchase Plan [Member]        
Class Of Stock [Line Items]        
Common stock reserved for issuance (in shares)   10,607,090   8,166,130
Shares Available for Grant, Increase in authorized shares 3,115,115      
2021 Employee Stock Purchase Plan [Member] | Common Class A [Member]        
Class Of Stock [Line Items]        
Common stock reserved for issuance (in shares)   5,162,575    
Purchase price of common stock expressed as a percentage of its fair value   85.00%