Accounting for Transmission Line projects Entered into by the Group - Schedule of Movement of Contract Assets (Detail) ₨ in Millions, $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
|
Mar. 31, 2026
INR (₨)
|
Mar. 31, 2026
USD ($)
|
Mar. 31, 2025
INR (₨)
|
Mar. 31, 2026
USD ($)
|
|
| Disclosure of detailed information about service concession arrangements [line items] | ||||
| Balance at the beginning of the year | ₨ 2,832 | ₨ 1,716 | ||
| Balance at the end of the year | 3,815 | $ 41 | 2,832 | |
| Non-current | 3,393 | 2,724 | $ 36 | |
| Current | 422 | 108 | 4 | |
| Other Than 3E NV Entity | ||||
| Disclosure of detailed information about service concession arrangements [line items] | ||||
| Balance at the beginning of the year | 2,832 | 30 | 1,716 | |
| Recognition of contract assets | 623 | 7 | 933 | |
| Unwinding of contract assets | 154 | 2 | 183 | |
| Balance at the end of the year | 3,609 | $ 38 | 2,832 | |
| Non-current | 3,393 | 2,724 | 36 | |
| Current | ₨ 216 | ₨ 108 | $ 2 | |