Finance costs and fair value change in derivative instruments - Additional Information (Detail) - INR (₨) ₨ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Disclosure Of Detailed Information About Finance Cost And Fair Value Change in Derivative Instruments [Abstract] | |||
| Unwinding income on trade receivables of financial assets | ₨ 301 | ₨ 504 | ₨ 441 |
| Trade receivables outstanding amount | ₨ 157 | ₨ 1,664 | |