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Stock-based compensation - Summary of Stock Options Outstanding and Exercisable (Details) | 12 Months Ended |
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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 |

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