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Stock-based compensation - Summary of Stock Options Outstanding and Exercisable (Details) | 12 Months Ended |
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Mar. 31, 2022 shares $ / shares | Mar. 31, 2021 shares $ / shares | Mar. 31, 2020 shares $ / 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 |

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