Cash and bank balances - Summary Of Bank Balances Other Than Cash And Cash Equivalents Explanatory (Detail) ₨ in Millions, $ in Millions |
Mar. 31, 2025
INR (₨)
|
Mar. 31, 2025
USD ($)
|
Mar. 31, 2024
INR (₨)
|
|---|---|---|---|
| Bank Balances Other Than Cash And Cash Equivalents [Abstract] | |||
| Less: amount disclosed under other financial assets (others) (refer Note 11) | ₨ (2,433) | $ (28) | ₨ (2,888) |
| Balances with banks | 40,099 | 469 | 50,706 |
| Gross carrying amount | |||
| Bank Balances Other Than Cash And Cash Equivalents [Abstract] | |||
| Balances with banks | 42,532 | 498 | 53,594 |
| Not later than one year | |||
| Bank Balances Other Than Cash And Cash Equivalents [Abstract] | |||
| Balances with banks | 40,099 | 469 | 50,706 |
| Later than one year | |||
| Bank Balances Other Than Cash And Cash Equivalents [Abstract] | |||
| Balances with banks | ₨ 2,433 | $ 28 | ₨ 2,888 |