Cash and bank balances - Additional Information (Detail) - INR (₨) ₨ in Millions |
12 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] | ||
| Balances with banks | ₨ 32,256 | ₨ 27,552 |
| Bottom of range [member] | ||
| Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] | ||
| Bank deposit, Maturity terms | 8 days | 8 days |
| Effective interest rate on Bank deposit | 2.75% | 3.25% |
| Top of range [member] | ||
| Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items] | ||
| Bank deposit, Maturity terms | 3475 days | 3563 days |
| Effective interest rate on Bank deposit | 8.16% | 8.10% |