Accounting for Transmission Line projects Entered into by the Group - Schedule of Movement of Contract Assets (Detail) (Parenthetical) - INR (₨) ₨ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Disclosure of assets recognised from costs to obtain or fulfil contracts with customers [line items] | |||
| Unwinding of contract asset percentage | 4.89% | 4.89% | |
| BOOM Model | |||
| Disclosure of assets recognised from costs to obtain or fulfil contracts with customers [line items] | |||
| Profit included in recognition of contract assets pursuant to recognition construction revenue | ₨ 36 | ₨ 161 | ₨ 3 |
| Derecognition of contract asset for BOOM projects transferred to trade receivable | ₨ 0 | ₨ 95 | |