Financial instrument - Summery of Liability on Written Put Options to Non-controlling Interest (Detail) ₨ in Millions, $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
|
Mar. 31, 2026
INR (₨)
|
Mar. 31, 2026
USD ($)
|
Mar. 31, 2025
INR (₨)
|
Mar. 31, 2024
INR (₨)
|
|
| Disclosure of financial assets [line items] | ||||
| Addition through Business combination (Refer to Note 7) | ₨ 0 | ₨ (1,537) | ||
| Finance expense recognized in consolidated statement of income | 14,577 | $ 156 | 14,770 | ₨ 12,552 |
| Liability on written put options to non-controlling interests [member] | ||||
| Disclosure of financial assets [line items] | ||||
| Balance at the beginning of the year | (4,945) | (4,303) | ||
| Finance expense recognized in consolidated statement of income | (585) | (530) | ||
| Changes in fair value of written put options | 385 | 0 | ||
| Translation adjustment | (554) | (112) | ||
| Balance at the end of the year | ₨ (5,699) | ₨ (4,945) | ₨ (4,303) | |