Other equity - Additional Information (Detail) - INR (₨) ₨ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Share based payment reserve | |||
| Disclosure Of Detailed Information About Reserve Of Share Based Payments Of Equity [Line Items] | |||
| Transferred amounts recognised in the reserve | ₨ 947 | ₨ 154 | ₨ 15 |