Other intangible assets - Schedule of asset useful economic lives (Details) - Software |
12 Months Ended |
|---|---|
Mar. 31, 2024 | |
| Bottom of range | |
| Disclosure of detailed information about intangible assets [line items] | |
| Amortised period (in years) | 3 years |
| Top of range | |
| Disclosure of detailed information about intangible assets [line items] | |
| Amortised period (in years) | 10 years |