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SHARE-BASED PAYMENTS - ESOP Summarized (Details) - Employee Stock Option Plan | 12 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 shares $ / shares | Mar. 31, 2020 shares $ / shares | Mar. 31, 2019 shares $ / shares
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share options outstanding | shares | 7,476,902 | 6,050,854 | 6,504,125
Weighted average remaining contractual life | 4 years 5 months 4 days |  |
Weighted average exercise price | $ 23.39 | $ 24.25 | $ 20.41
Exercisable (in shares) | shares | 2,934,364 | 2,187,379 |
Weighted average exercise price of share options exercisable in share-based payment arrangement | $ 21.66 | $ 19.05 |
$14.61 to $16.15 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share options outstanding | shares | 1,201,885 |  |
Weighted average remaining contractual life | 1 year 9 months 18 days |  |
Weighted average exercise price | $ 15.80 |  |
Exercisable (in shares) | shares | 1,201,885 |  |
Weighted average exercise price of share options exercisable in share-based payment arrangement | $ 15.80 |  |
$14.61 to $16.15 | Minimum |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise prices | 14.61 |  |
$14.61 to $16.15 | Maximum |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise prices | $ 16.15 |  |
$20.24 to $22.26 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share options outstanding | shares | 3,735,679 |  |
Weighted average remaining contractual life | 5 years 1 month 17 days |  |
Weighted average exercise price | $ 21.12 |  |
Exercisable (in shares) | shares | 864,229 |  |
Weighted average exercise price of share options exercisable in share-based payment arrangement | $ 22.13 |  |
$20.24 to $22.26 | Minimum |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise prices | 20.24 |  |
$20.24 to $22.26 | Maximum |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise prices | $ 22.26 |  |
$22.31 to $34.98 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share options outstanding | shares | 2,539,338 |  |
Weighted average remaining contractual life | 4 years 7 months 20 days |  |
Weighted average exercise price | $ 30.31 |  |
Exercisable (in shares) | shares | 868,250 |  |
Weighted average exercise price of share options exercisable in share-based payment arrangement | $ 29.29 |  |
$22.31 to $34.98 | Minimum |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise prices | 22.31 |  |
$22.31 to $34.98 | Maximum |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise prices | $ 34.98 |  |

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