Commitments, liabilities and contingencies - Summary of Contingent Liabilities (Detail) ₨ in Millions, $ in Millions |
Mar. 31, 2025
INR (₨)
|
Mar. 31, 2025
USD ($)
|
Mar. 31, 2024
INR (₨)
|
|---|---|---|---|
| Contingent liabilities on account of liquidated damages | |||
| Disclosure of contingent liabilities [line items] | |||
| Contingent liability | ₨ 484 | $ 6 | ₨ 484 |
| Contingent liabilities on account of transmission penalties | |||
| Disclosure of contingent liabilities [line items] | |||
| Contingent liability | 1,289 | 15 | 1,283 |
| Income tax disallowances / demands under litigation | |||
| Disclosure of contingent liabilities [line items] | |||
| Contingent liability | 257 | 3 | 190 |
| Others | |||
| Disclosure of contingent liabilities [line items] | |||
| Contingent liability | ₨ 2,983 | $ 35 | ₨ 759 |