v3.26.1
Commitments and contingencies (Details) - SEK (kr)
kr in Thousands
Dec. 31, 2025
Dec. 31, 2024
Entity Information [Line Items]    
Trade payables (including accruals) kr 265,701 kr 376,292
Right-of-use asset 578,494 586,920
B Y D Motors L L C [Member]    
Entity Information [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 L L C [Member]    
Entity Information [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]    
Entity Information [Line Items]    
Trade and other receivables 15,578 27,645
Trade payables (including accruals)
Right-of-use asset
Lease liability