Employee benefits (Details 6) |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Actuarial assumptions [Abstract] | |||
| Discount rate | 6.70% | 6.65% | 7.15% |
| Expected long term rate of return on plan assets | 8.00% | 8.00% | 8.00% |
| Average future working lifetime (Years) | 20 years 9 months | 21 years 8 months 1 day | 21 years 5 months 15 days |