Financial risk management objectives and policies - Additional Information (Detail) - INR (₨) ₨ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Financial Risk Management Objectives And Policies [Abstract] | |||
| Increase / (decrease) in market value of warrant | 5.00% | ||
| Impact on profit or loss on change in market value of warrant | ₨ 9 | ₨ 38 | ₨ 64 |
| Increase / (decrease) in volume weight average share price | 5.00% | ||
| Impact on total equity on change in volume weight average share price | ₨ 303 | ₨ 296 | ₨ 270 |