Trade and other receivables (Details 1) - INR (₨) ₨ in Millions |
12 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Reconciliation of changes in allowance account for credit losses of financial assets [abstract] | ||
| Balance at the beginning of the year | ₨ 1,478 | ₨ 1,451 |
| Provision made during the year, net of reversals | 346 | 159 |
| Trade and other receivables written off & exchange differences | 23 | (132) |
| Balance at the end of the year | ₨ 1,847 | ₨ 1,478 |