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v3.22.1

Share-based payments (Details 1) | 12 Months Ended |  |  |
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Mar. 31, 2022 | Mar. 31, 2022 ₨ / shares | Mar. 31, 2022 $ / shares | Mar. 31, 2022 yr | Mar. 31, 2021 | Mar. 31, 2021 ₨ / shares | Mar. 31, 2021 $ / shares | Mar. 31, 2021 yr | Mar. 31, 2020 | Mar. 31, 2020 ₨ / shares | Mar. 31, 2020 $ / shares | Mar. 31, 2020 yr | Mar. 31, 2019 ₨ / shares | Mar. 31, 2022 ₨ / shares | Mar. 31, 2022 yr | Mar. 31, 2021 ₨ / shares | Mar. 31, 2021 yr | Mar. 31, 2020 ₨ / shares | Mar. 31, 2020 yr
Disclosure of Share-based payments [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of options, Opening balance | 7,780,278 |  |  | 7,780,278 | 11,056,100 |  |  | 11,056,100 | 4,588,300 |  |  |  |  |  |  |  |  |  |
Number of options, Granted during the year | 195,000 |  |  |  | 465,000 |  |  |  | 7,220,000 |  |  |  |  |  |  |  |  |  |
Number of options, Forfeited during the year | (238,000) |  |  |  | (726,000) |  |  |  | (673,300) |  |  |  |  |  |  |  |  |  |
Number of options, Expired during the year | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  |  |  |  |  |  |  |
Number of options, Exercised during the year | (504,300) |  |  |  | (3,014,822) |  |  |  | (78,900) |  |  |  |  |  |  |  |  |  |
Number of options, Closing balance | 7,232,978 |  |  | 7,232,978 | 7,780,278 |  |  | 7,780,278 | 11,056,100 |  |  | 11,056,100 | 4,588,300 |  |  |  |  |  |
Number of options, Exercisable at the end of the year | 8,771,360 | 8,771,360 | 8,771,360 | 8,771,360 | 6,582,070 | 6,582,070 | 6,582,070 | 6,582,070 | 4,281,090 | 4,281,090 | 4,281,090 | 4,281,090 |  |  | 8,771,360 |  | 6,582,070 |  | 4,281,090
Weighted average exercise price, Opening balance | (per share) |  | ₨ 86.13 | $ 86.13 |  |  | ₨ 70.9 | $ 70.9 |  |  | ₨ 78.84 |  |  |  |  |  |  |  |  |
Weighted average exercise price, Granted during the year |  | 146.23 |  |  |  | 118.05 |  |  |  | 89.55 |  |  |  |  |  |  |  |  |
Weighted average exercise price, Forfeited during the year |  | 85.24 |  |  |  | 81.43 |  |  |  | 67.55 |  |  |  |  |  |  |  |  |
Weighted average exercise price, Expired during the year |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  |  |  |  |  |  |
Weighted average exercise price, Exercised during the year |  | 85.24 |  |  |  | 81.43 |  |  |  | 67.55 |  |  |  |  |  |  |  |  |
Weighted average exercise price, Closing balance | (per share) |  | ₨ 87.82 | $ 87.82 |  |  | ₨ 86.13 | $ 86.13 |  |  | ₨ 70.9 | $ 70.9 |  | ₨ 78.84 |  |  |  |  |  |
Weighted average exercise price, Exercisable at the end of the year |  |  |  |  |  |  |  |  |  |  |  |  |  | ₨ 87.82 |  | ₨ 81.99 |  | ₨ 77.92 |

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