Employee Benefits - Summary of Fund and Plan Assets of Provident Fund (Detail) - INR (₨) ₨ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|---|---|---|---|
| Disclosure of defined benefit plans [line items] | |||
| Fair value of plan assets | ₨ 29,837 | ₨ 22,231 | ₨ 20,022 |
| Provident fund [member] | |||
| Disclosure of defined benefit plans [line items] | |||
| Fair value of plan assets | 133,417 | 121,067 | |
| Present value of defined benefit obligation | (133,417) | (121,067) | |
| Net shortfall | ₨ 0 | ₨ 0 |