Other operating income - Summary of Other Operating Income (Detail) ₨ in Millions, $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
|
Mar. 31, 2025
INR (₨)
|
Mar. 31, 2025
USD ($)
|
Mar. 31, 2024
INR (₨)
|
Mar. 31, 2023
INR (₨)
|
|
| Schedule Of Other Operating Income [Abstract] | ||||
| Income from sale of emission reduction certificates | ₨ 424 | $ 4 | ₨ 580 | ₨ 1,045 |
| Others | 26 | 0 | 49 | 60 |
| Total | ₨ 450 | $ 4 | ₨ 629 | ₨ 1,105 |