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Stock-based compensation - Summary of Stock Options Outstanding and Exercisable (Details)
 12 Months Ended
Mar. 31, 2023
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$ / shares
Mar. 31, 2022
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$ / shares
Mar. 31, 2021
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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 10,060,296 11,823,310 6,796,039
Weighted average remaining contractual life of outstanding share options (years) 5 years 2 months 8 days 5 years 9 months 25 days  
Weighted average exercise price, options outstanding (in USD per share) $ 30.58 $ 38.37 $ 24.56
Number of share options exercisable (in shares) | shares 3,771,711 2,600,818  
Weighted average remaining contractual life of share options exercisable (years) 3 years 11 months 8 days 4 years 5 months 12 days  
Weighted average exercisable price, options expired (in USD per share) $ 31.24 $ 23.05  
Exercise price range one      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 1,930,537 2,735,944  
Weighted average remaining contractual life of outstanding share options (years) 5 years 1 month 2 days 4 years 9 months 25 days  
Weighted average exercise price, options outstanding (in USD per share) $ 12.19 $ 11.60  
Number of share options exercisable (in shares) | shares 719,850 1,017,325  
Weighted average remaining contractual life of share options exercisable (years) 2 years 2 months 15 days 3 years 3 months 10 days  
Weighted average exercisable price, options expired (in USD per share) $ 5.80 $ 5.02  
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) 2.17 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) $ 18.92 $ 21.90  
Exercise price range two      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 1,886,776 2,137,518  
Weighted average remaining contractual life of outstanding share options (years) 5 years 7 months 9 days 5 years 8 months 1 day  
Weighted average exercise price, options outstanding (in USD per share) $ 21.49 $ 24.29  
Number of share options exercisable (in shares) | shares 384,078 796,323  
Weighted average remaining contractual life of share options exercisable (years) 4 years 2 months 26 days 5 years 1 month 13 days  
Weighted average exercisable price, options expired (in USD per share) $ 21.79 $ 24.90  
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) 18.93 21.91  
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) $ 22.62 $ 27.52  
Exercise price range three      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 2,268,067 2,238,268  
Weighted average remaining contractual life of outstanding share options (years) 4 years 5 months 15 days 6 years 4 months 2 days  
Weighted average exercise price, options outstanding (in USD per share) $ 23.99 $ 30.75  
Number of share options exercisable (in shares) | shares 1,409,502 302,339  
Weighted average remaining contractual life of share options exercisable (years) 3 years 9 months 7 days 4 years 11 months 8 days  
Weighted average exercisable price, options expired (in USD per share) $ 24.27 $ 28.71  
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) 22.63 27.53  
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) $ 27.73 $ 33.19  
Exercise price range four      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 1,896,698 1,855,419  
Weighted average remaining contractual life of outstanding share options (years) 5 years 6 months 3 days 6 years 3 months  
Weighted average exercise price, options outstanding (in USD per share) $ 31.49 $ 45.76  
Number of share options exercisable (in shares) | shares 291,923 286,652  
Weighted average remaining contractual life of share options exercisable (years) 3 years 9 months 14 days 5 years 25 days  
Weighted average exercisable price, options expired (in USD per share) $ 31.80 $ 38.86  
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) 27.74 33.20  
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) $ 41.54 $ 65.89  
Exercise price range five      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 2,078,218 2,856,161  
Weighted average remaining contractual life of outstanding share options (years) 5 years 5 months 1 day 6 years 2 months 19 days  
Weighted average exercise price, options outstanding (in USD per share) $ 62.27 $ 75.73  
Number of share options exercisable (in shares) | shares 966,358 198,179  
Weighted average remaining contractual life of share options exercisable (years) 5 years 4 months 17 days 6 years 1 month 20 days  
Weighted average exercisable price, options expired (in USD per share) $ 63.92 $ 76.67  
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) 41.55 65.90  
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) $ 93.45 $ 94.03