financial instruments - Fair values - General (Details) - Level 3 |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| Wind discount risk | ||
| financial instruments | ||
| Percentage of electric power pool price | 55.00% | 76.00% |
| Solar premium risk | ||
| financial instruments | ||
| Percentage of electric power pool price | 82.00% | 82.00% |