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Share-based compensation - Additional Information (Details)
 12 Months Ended
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2017
shares
Disclosure Of Share Based Payments [Line Items]        
Weighted-average contractual life for stock options outstanding 2 years 8 months 12 days 2 years 10 months 24 days 2 years 10 months 24 days  
Weighted-average share price at exercise for options exercised (in dollars per share) | $ $ 280.08 $ 198.10 $ 141.82  
Weighted average fair value at measurement date, share options granted (in dollars per share) | $ $ 78.65 $ 36.82 $ 34.63  
Increase decrease in expected life one year      
Employee Stock Option Plans | 2020 Plans        
Disclosure Of Share Based Payments [Line Items]        
Percentage of fair value of ordinary shares 150.00%      
Options granted period 5 years      
Employee Stock Option Plans | 2020 Plans | Minimum | Vesting Tranche After First Vesting Period        
Disclosure Of Share Based Payments [Line Items]        
Vesting period 3 months      
Employee Stock Option Plans | 2020 Plans | Maximum | Vesting Tranche After First Vesting Period        
Disclosure Of Share Based Payments [Line Items]        
Vesting period 8 months      
Restricted stock units        
Disclosure Of Share Based Payments [Line Items]        
Number of shares granted (in shares) 793,337 1,127,149 715,224  
Restricted stock units | 2020 Plans        
Disclosure Of Share Based Payments [Line Items]        
Vesting period 4 years      
Restricted stock units | 2020 Plans | Minimum | Vesting Tranche After First Vesting Period        
Disclosure Of Share Based Payments [Line Items]        
Vesting period 3 months      
Restricted stock units | 2020 Plans | Maximum | Vesting Tranche After First Vesting Period        
Disclosure Of Share Based Payments [Line Items]        
Vesting period 8 months      
Restricted stock awards        
Disclosure Of Share Based Payments [Line Items]        
Number of shares granted (in shares) 0 0 0  
Restricted stock awards | 2017 Acquiree        
Disclosure Of Share Based Payments [Line Items]        
Number of shares issued (in shares)       61,880
Restricted stock awards | Bottom of Range | 2017 Acquiree        
Disclosure Of Share Based Payments [Line Items]        
Vesting period       2 years
Restricted stock awards | Top of Range | 2017 Acquiree        
Disclosure Of Share Based Payments [Line Items]        
Vesting period       3 years
Other contingently issuable shares        
Disclosure Of Share Based Payments [Line Items]        
Number of shares granted (in shares) 22,988 34,450 162,320  
Other contingently issuable shares | Anchor        
Disclosure Of Share Based Payments [Line Items]        
Vesting period   4 years    
Number of shares granted (in shares)     162,320  
Grant date fair value of each equity instrument (in dollars per share) | $   $ 145.21    
Other contingently issuable shares | The Ringer        
Disclosure Of Share Based Payments [Line Items]        
Vesting period   5 years    
Number of shares granted (in shares)   34,450    
Grant date fair value of each equity instrument (in dollars per share) | $   $ 145.14