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Stock-based compensation - Summary of Stock Options Outstanding and Exercisable (Details)
 12 Months Ended
Mar. 31, 2022
shares
$ / shares
Mar. 31, 2021
shares
$ / shares
Mar. 31, 2020
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$ / shares
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 11,823,310 6,796,039 7,557,574
Weighted average remaining contractual life of outstanding share options (years) 5 years 9 months 25 days 5 years 6 months 21 days  
Weighted average exercise price, options outstanding (in USD per share) $ 38.37 $ 24.48 $ 15.38
Number of share options exercisable (in shares) | shares 2,600,818 1,523,685  
Weighted average remaining contractual life of share options exercisable (years) 4 years 5 months 12 days 5 years 1 month 17 days  
Weighted average exercisable price, options expired (in USD per share) $ 23.05 $ 17.40  
Exercise price range one      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 2,735,944 1,551,131  
Weighted average remaining contractual life of outstanding share options (years) 4 years 9 months 25 days 4 years 6 months 3 days  
Weighted average exercise price, options outstanding (in USD per share) $ 11.60 $ 3.95  
Number of share options exercisable (in shares) | shares 1,017,325 419,063  
Weighted average remaining contractual life of share options exercisable (years) 3 years 3 months 10 days 3 years 11 months 8 days  
Weighted average exercisable price, options expired (in USD per share) $ 5.02 $ 3.09  
Exercise price range one | Bottom of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (in USD per share) 0.30 0.30  
Exercise price range one | Top of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (in USD per share) $ 21.90 $ 4.86  
Exercise price range two      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 2,137,518 1,334,262  
Weighted average remaining contractual life of outstanding share options (years) 5 years 8 months 1 day 5 years 4 months 6 days  
Weighted average exercise price, options outstanding (in USD per share) $ 24.29 $ 14.22  
Number of share options exercisable (in shares) | shares 796,323 472,154  
Weighted average remaining contractual life of share options exercisable (years) 5 years 1 month 13 days 5 years 4 months 9 days  
Weighted average exercisable price, options expired (in USD per share) $ 24.90 $ 14.77  
Exercise price range two | Bottom of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (in USD per share) 21.91 4.87  
Exercise price range two | Top of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (in USD per share) $ 27.52 $ 24.52  
Exercise price range three      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 2,238,268 1,424,350  
Weighted average remaining contractual life of outstanding share options (years) 6 years 4 months 2 days 5 years 11 months 1 day  
Weighted average exercise price, options outstanding (in USD per share) $ 30.75 $ 25.82  
Number of share options exercisable (in shares) | shares 302,339 308,005  
Weighted average remaining contractual life of share options exercisable (years) 4 years 11 months 8 days 5 years 9 months 29 days  
Weighted average exercisable price, options expired (in USD per share) $ 28.71 $ 25.53  
Exercise price range three | Bottom of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (in USD per share) 27.53 24.53  
Exercise price range three | Top of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (in USD per share) $ 33.19 $ 26.73  
Exercise price range four      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 1,855,419 1,308,231  
Weighted average remaining contractual life of outstanding share options (years) 6 years 3 months 5 years 11 months 12 days  
Weighted average exercise price, options outstanding (in USD per share) $ 45.76 $ 29.54  
Number of share options exercisable (in shares) | shares 286,652 179,099  
Weighted average remaining contractual life of share options exercisable (years) 5 years 25 days 5 years 10 months 13 days  
Weighted average exercisable price, options expired (in USD per share) $ 38.86 $ 28.73  
Exercise price range four | Bottom of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (in USD per share) 33.20 26.74  
Exercise price range four | Top of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (in USD per share) $ 65.89 $ 33.52  
Exercise price range five      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 2,856,161 1,178,065  
Weighted average remaining contractual life of outstanding share options (years) 6 years 2 months 19 days 6 years 3 months 18 days  
Weighted average exercise price, options outstanding (in USD per share) $ 75.73 $ 55.88  
Number of share options exercisable (in shares) | shares 198,179 145,364  
Weighted average remaining contractual life of share options exercisable (years) 6 years 1 month 20 days 5 years 5 months 19 days  
Weighted average exercisable price, options expired (in USD per share) $ 76.67 $ 35.96  
Exercise price range five | Bottom of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (in USD per share) 65.90 33.53  
Exercise price range five | Top of range      
Disclosure of range of exercise prices of outstanding share options [line items]      
Exercise price of outstanding share options (in USD per share) $ 94.03 $ 72.94