Cost of sales - Disclosure major items of cost of sales (Details) - INR (₨) ₨ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Disclosure Of Cost of Goods Sold And Services Rendered [Abstract] | |||
| Personnel expenses | ₨ 2,892 | ₨ 2,874 | ₨ 2,859 |
| Network Costs | 9,478 | 9,032 | 7,869 |
| Cost of Hardware / Software | 4,598 | 4,419 | 4,327 |
| Power Costs | 6,490 | 5,593 | 4,623 |
| Total Amount Cost Of Sales | ₨ 23,458 | ₨ 21,918 | ₨ 19,678 |