Additional Capital Disclosures - Summary of Capital Structure (Detail) ₨ in Millions, $ in Millions |
Mar. 31, 2026
INR (₨)
|
Mar. 31, 2026
USD ($)
|
Mar. 31, 2025
INR (₨)
|
Mar. 31, 2024
INR (₨)
|
|---|---|---|---|---|
| Disclosure of Capital Structure [line items] | ||||
| Equity attributable to the equity shareholders of the Company | ₨ 885,368 | $ 9,437 | ₨ 828,309 | |
| As percentage of total capital | 81.00% | 81.00% | 81.00% | |
| Current loans, borrowings and bank overdrafts | ₨ 165,912 | $ 1,768 | ₨ 97,863 | |
| Loans and borrowings | 1,962 | $ 21 | 63,954 | |
| Current and non-current lease liabilities | 35,036 | 30,218 | ₨ 22,728 | |
| Total loans, borrowings and bank overdrafts and lease liabilities | ₨ 202,910 | ₨ 192,035 | ||
| As percentage of total capital | 19.00% | 19.00% | 19.00% | |
| Total capital | ₨ 1,088,278 | ₨ 1,020,344 | ||
| Change in equity attributable to equity shareholders | 7.00% | 7.00% | ||
| Change in percentage of loans, borrowings and bank overdrafts and lease liabilities | 6.00% | 6.00% | ||
| Percentage of change, Total capital (loans and borrowings and equity) | 7.00% | 7.00% |