Interest-bearing loans and borrowings - long term - Additional Information (Detail) - INR (₨) ₨ in Millions |
12 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Disclosure of Long term interest bearing loans and borrowings [Line Items] | ||
| Loan arrangements borrowings for which covenant | ₨ 267,959 | ₨ 288,170 |