Commitments and Contingencies - Additional Information (Detail) - INR (₨) ₨ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| Disclosure of contingent liabilities [line items] | ||
| Capital commitments | ₨ 9,416 | ₨ 8,719 |
| Financial guarantee amount | 13,358 | 13,110 |
| Tax contingent liability [member] | ||
| Disclosure of contingent liabilities [line items] | ||
| Contingent tax liability | 104,613 | 99,431 |
| Excise duty, Custom duty, sales tax and other matters [member] | ||
| Disclosure of contingent liabilities [line items] | ||
| Contingent tax liability | ₨ 20,733 | ₨ 19,292 |