Investments in joint ventures and associates - Disclosure of material interest in joint ventures and associates (Details) - lease |
12 Months Ended | |
|---|---|---|
Mar. 31, 2024 |
Feb. 25, 2022 |
|
| BritNed Development Limited | ||
| Disclosure of joint ventures [line items] | ||
| Proportion of ownership interest in joint venture | 50.00% | |
| Nemo Link Limited | ||
| Disclosure of joint ventures [line items] | ||
| Proportion of ownership interest in joint venture | 50.00% | |
| Emerald Energy Venture LLC | ||
| Disclosure of joint ventures [line items] | ||
| Proportion of ownership interest in joint venture | 51.00% | |
| Community Offshore Wind LLC | ||
| Disclosure of joint ventures [line items] | ||
| Proportion of ownership interest in joint venture | 27.27% | |
| Community Offshore Wind LLC | Joint ventures | ||
| Disclosure of joint ventures [line items] | ||
| Number of leases won | 6 |