Schedule of commitments and contingencies (Details) - SEK (kr) kr in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|---|
| IfrsStatementLineItems [Line Items] | ||||
| Trade payables (including accruals) | kr 411,043 | kr 265,701 | kr 376,292 | |
| Right-of-use asset | kr 664,696 | 578,494 | 586,920 | kr 505,602 |
| BYD Motors LLC [member] | ||||
| IfrsStatementLineItems [Line Items] | ||||
| Trade and other receivables | 354 | 1,133 | ||
| Trade payables (including accruals) | 121,757 | 140,085 | ||
| Right-of-use asset | ||||
| Lease liability | ||||
| Voltera Power LLC [member] | ||||
| IfrsStatementLineItems [Line Items] | ||||
| Trade and other receivables | ||||
| Trade payables (including accruals) | 68,220 | 42,631 | ||
| Right-of-use asset | 266,030 | 345,200 | ||
| Lease liability | 305,486 | 375,087 | ||
| Maersk [member] | ||||
| IfrsStatementLineItems [Line Items] | ||||
| Trade and other receivables | 15,578 | 27,645 | ||
| Trade payables (including accruals) | ||||
| Right-of-use asset | ||||
| Lease liability |