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Stock-based compensation - Summary of Stock Options Outstanding and Exercisable (Details) | 12 Months Ended |
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Mar. 31, 2023 shares $ / shares | Mar. 31, 2022 shares $ / shares | Mar. 31, 2021 shares $ / 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 |

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