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Summary of changes in share options outstanding (Details)
 12 Months Ended
Mar. 31, 2023
shares
$ / shares
Mar. 31, 2023
shares
₨ / shares
Mar. 31, 2022
shares
$ / shares
Mar. 31, 2022
shares
₨ / shares
Share plan 2006 and india share plan 2006 [member]        
IfrsStatementLineItems [Line Items]        
Number of options outstanding at the beginning of the year 204,224 204,224 219,986 219,986
Number of options outstanding at the beginning of the year | (per share) $ 82.19 ₨ 329.33 [1]   ₨ 318.33 [1]
Granted during the year
Granted during the year | ₨ / shares     [1]
Forfeited during the year
Forfeited during the year | ₨ / shares     [1]
Expired during the year 369 369 15,762 15,762
Expired during the year | ₨ / shares   ₨ 356.65   ₨ 351.37 [1]
Number of share options exercised in share-based payment arrangement
Exercised during the year | ₨ / shares     [1]
Number of options outstanding at the end of the year 203,855 203,855 204,224 204,224
Number of options outstanding at the end of the year | (per share) $ 82.19 ₨ 356.65 $ 82.19 ₨ 329.33 [1]
Vested/exercisable 203,855 203,855 204,224 204,224
Vested/exercisable | ₨ / shares   ₨ 356.65   ₨ 329.23 [1]
2016 stock option and incentive plan [member]        
IfrsStatementLineItems [Line Items]        
Number of options outstanding at the beginning of the year 407,323 407,323 681,227 681,227
Number of options outstanding at the beginning of the year | ₨ / shares [2]   ₨ 246.66   ₨ 293.23
Granted during the year
Granted during the year | ₨ / shares     [2]
Forfeited during the year 54,545 54,545 115,257 115,257
Forfeited during the year | ₨ / shares   ₨ 164.38   ₨ 154.20 [2]
Expired during the year 81,408 81,408 158,647 158,647
Expired during the year | ₨ / shares   ₨ 362.67   ₨ 560.80 [2]
Number of options outstanding at the end of the year 271,370 271,370 407,323 407,323
Number of options outstanding at the end of the year | ₨ / shares   ₨ 259.07   ₨ 246.66 [2]
Vested/exercisable 175,918 175,918 191,988 191,988
Vested/exercisable | ₨ / shares   ₨ 311.02   ₨ 352.82 [2]
[1] The weighted average exercise price per share is fixed in USD. The amount disclosed in INR are determined by multiplying exercise price per share in USD by exchange rate of INR 82.19 per USD as at March 31, 2023 (March 31, 2022 INR 82.19 per USD).
[2] The weighted average exercise price per share is fixed in USD. The amount disclosed in INR are determined by multiplying exercise price per share in USD by exchange rate of INR 82.19 per USD as at March 31, 2023 (March 31, 2022 INR 82.19 per USD).