Cash and bank balances - Summary of Cash And Cash Equivalents Explanatory (Detail) ₨ in Millions, $ in Millions |
Mar. 31, 2025
INR (₨)
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Mar. 31, 2025
USD ($)
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Mar. 31, 2024
INR (₨)
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Mar. 31, 2024
USD ($)
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Mar. 31, 2023
INR (₨)
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Mar. 31, 2022
INR (₨)
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|---|---|---|---|---|---|---|
| Cash and cash equivalents [abstract] | ||||||
| Cash and cheque on hand | ₨ 1 | $ 0 | ₨ 0 | ₨ 1 | ||
| Balances with banks | ||||||
| - On current accounts | 15,083 | 177 | 11,466 | 14,500 | ||
| - Deposits with original maturity of less than 3 months | 25,335 | 297 | 15,555 | 23,681 | ||
| Total cash and cash equivalents (refer Note 15) | ₨ 40,419 | $ 473 | ₨ 27,021 | $ 316 | ₨ 38,182 | ₨ 28,379 |