v3.25.2
Share-based Payments - Schedule of Award Activity Related to Stock Incentive Plans (Details) - shares
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
BIP      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
As of beginning of the year (in shares) 1,199,972 1,311,989 1,216,361
Granted (in shares) 331,999 338,189 544,491
Forfeited/expired before vesting (in shares) 0 0 (13,554)
Vested (in shares) (461,783) (450,206) (435,309)
Transfer to liability-settled LTIP (in shares) 0 0 0
Transfer to liability-settled RSU (in shares) 0 0 0
As of end of the year (in shares) 1,070,188 1,199,972 1,311,989
ESOP      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
As of beginning of the year (in shares) 746,762 773,844 3,372,452
Granted (in shares) 363,868 363,559 450,340
Forfeited/expired before vesting (in shares) (98,350) (39,545) (96,015)
Vested (in shares) (346,903) (351,096) (2,949,200)
Transfer to liability-settled LTIP (in shares) 0 0 0
Transfer to liability-settled RSU (in shares) 0 0 (3,733)
As of end of the year (in shares) 665,377 746,762 773,844
Equity-Settled LTIP      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
As of beginning of the year (in shares) 65,410,484 59,752,598 40,861,734
Granted (in shares) 44,722,656 36,531,621 38,897,622
Forfeited/expired before vesting (in shares) (10,023,316) (4,747,804) (4,682,948)
Vested (in shares) (29,843,482) (25,916,216) (15,237,880)
Transfer to liability-settled LTIP (in shares) 0 (209,715) (85,930)
Transfer to liability-settled RSU (in shares) 0 0 0
As of end of the year (in shares) 70,266,342 65,410,484 59,752,598