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Stock-based compensation - Summary of Stock Options Outstanding and Exercisable (Details)
 12 Months Ended
Mar. 31, 2024
shares
$ / shares
Mar. 31, 2023
shares
$ / shares
Mar. 31, 2022
shares
$ / shares
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 11,083,212 10,060,296 11,823,310
Weighted average remaining contractual life of outstanding share options (years) 4 years 10 months 28 days 5 years 2 months 8 days  
Weighted average exercise price, options outstanding (in USD per share) $ 25.68 $ 30.58 $ 36.36
Number of share options exercisable (in shares) | shares 4,335,111 3,771,711  
Weighted average remaining contractual life of share options exercisable (years) 3 years 10 months 17 days 3 years 11 months 8 days  
Weighted average exercisable price, options expired (in USD per share) $ 30.17 $ 31.24  
Exercise price range one      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 2,483,720 1,930,537  
Weighted average remaining contractual life of outstanding share options (years) 5 years 6 months 3 days 5 years 1 month 2 days  
Weighted average exercise price, options outstanding (in USD per share) $ 12.46 $ 12.19  
Number of share options exercisable (in shares) | shares 787,825 719,850  
Weighted average remaining contractual life of share options exercisable (years) 4 years 1 month 13 days 2 years 2 months 15 days  
Weighted average exercisable price, options expired (in USD per share) $ 10.62 $ 5.80  
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 2.17  
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) $ 13.35 $ 18.92  
Exercise price range two      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 2,169,016 1,886,776  
Weighted average remaining contractual life of outstanding share options (years) 6 years 1 month 9 days 5 years 7 months 9 days  
Weighted average exercise price, options outstanding (in USD per share) $ 14.69 $ 21.49  
Number of share options exercisable (in shares) | shares 419,481 384,078  
Weighted average remaining contractual life of share options exercisable (years) 5 years 9 months 3 days 4 years 2 months 26 days  
Weighted average exercisable price, options expired (in USD per share) $ 14.72 $ 21.79  
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) 13.36 18.93  
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) $ 17.01 $ 22.62  
Exercise price range three      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 2,137,549 2,268,067  
Weighted average remaining contractual life of outstanding share options (years) 4 years 6 months 18 days 4 years 5 months 15 days  
Weighted average exercise price, options outstanding (in USD per share) $ 20.94 $ 23.99  
Number of share options exercisable (in shares) | shares 1,033,606 1,409,502  
Weighted average remaining contractual life of share options exercisable (years) 3 years 9 months 18 days 3 years 9 months 7 days  
Weighted average exercisable price, options expired (in USD per share) $ 21.42 $ 24.27  
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) 17.02 22.63  
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) $ 23.25 $ 27.73  
Exercise price range four      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 2,469,252 1,896,698  
Weighted average remaining contractual life of outstanding share options (years) 4 years 3 months 21 days 5 years 6 months 3 days  
Weighted average exercise price, options outstanding (in USD per share) $ 29.05 $ 31.49  
Number of share options exercisable (in shares) | shares 804,717 291,923  
Weighted average remaining contractual life of share options exercisable (years) 3 years 1 month 24 days 3 years 9 months 14 days  
Weighted average exercisable price, options expired (in USD per share) $ 25.37 $ 31.80  
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) 23.26 27.74  
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) $ 31.69 $ 41.54  
Exercise price range five      
Disclosure of range of exercise prices of outstanding share options [line items]      
Number of share options outstanding (in shares) | shares 1,823,675 2,078,218  
Weighted average remaining contractual life of outstanding share options (years) 3 years 10 months 13 days 5 years 5 months 1 day  
Weighted average exercise price, options outstanding (in USD per share) $ 57.75 $ 62.27  
Number of share options exercisable (in shares) | shares 1,289,482 966,358  
Weighted average remaining contractual life of share options exercisable (years) 3 years 7 months 17 days 5 years 4 months 17 days  
Weighted average exercisable price, options expired (in USD per share) $ 57.16 $ 63.92  
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) 31.70 41.55  
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 $ 93.45