v3.25.2
Related party disclosure - Additional Information (Detail)
₨ in Millions, $ in Millions
12 Months Ended
Mar. 31, 2025
USD ($)
shares
Mar. 31, 2024
INR (₨)
shares
Mar. 31, 2023
shares
Mar. 31, 2025
INR (₨)
Statement [Line Items]        
Weighted average number of days trading price 30 days      
Conversion ratio as per terms of option conversion ratio of 1:0.8289      
Maximum cash purchase per annum required for shares | $ $ 12      
2021 Incentive Award Plan        
Statement [Line Items]        
Options granted to key management personnel 4,266,892 12,287,354 4,087,354  
Liability for put options with non-controlling interests        
Statement [Line Items]        
Outstanding liability | ₨   ₨ 5,935   ₨ 6,358
Put option exercised during period 0 2,116,955 2,037,252