Right-of-Use asset - Summary of Lease Liability (Detail) ₨ in Millions, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
|
Mar. 31, 2026
INR (₨)
|
Mar. 31, 2025
INR (₨)
|
Mar. 31, 2026
USD ($)
|
|
| Lease liabilities [abstract] | |||
| Balance at the beginning of the year | ₨ 30,218 | ₨ 22,728 | |
| Additions | 11,680 | 16,649 | |
| Additions through business combinations | 1,062 | 0 | |
| Deletions | (1,268) | (967) | |
| Finance cost accrued during the period | 1,956 | 1,593 | |
| Payment of lease liabilities | (11,561) | (10,474) | |
| Translation adjustment | 2,949 | 689 | |
| Balance at the end of the year | 35,036 | 30,218 | |
| Non-current | 26,327 | 22,193 | $ 281 |
| Current | ₨ 8,709 | ₨ 8,025 | $ 92 |