Other non-current financial liabilities (Details) ₨ in Millions, $ in Millions |
Mar. 31, 2026
INR (₨)
|
Mar. 31, 2026
USD ($)
|
Mar. 31, 2025
INR (₨)
|
|---|---|---|---|
| Disclosure Of Other Noncurrent Financial Liabilities [Line Items] | |||
| Total other non-current financial liabilities | ₨ 4,030 | $ 43 | ₨ 52 |
| 6% Compulsorily Convertible Debentures [Member] | |||
| Disclosure Of Other Noncurrent Financial Liabilities [Line Items] | |||
| Total other non-current financial liabilities | 4,000 | 0 | |
| Security deposit [Member] | |||
| Disclosure Of Other Noncurrent Financial Liabilities [Line Items] | |||
| Total other non-current financial liabilities | ₨ 30 | ₨ 52 |