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Material accounting policies - Vessels, property, plant and equipment (Details) - $ / t
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
vessels    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated useful life   20 years
FSO/FPSO    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated useful life   30 years
FSOs    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated useful life   30 years
Extension term of contract   10 years
CTV's    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated useful life   15 years
plant and equipment | Minimum    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated useful life   5 years
plant and equipment | Maximum    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated useful life   20 years
fixtures and fittings | Minimum    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated useful life   5 years
fixtures and fittings | Maximum    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated useful life   10 years
Other tangible assets | Minimum    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated useful life   3 years
Other tangible assets | Maximum    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated useful life   20 years
dry-docking | Minimum    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated useful life   2 years 6 months
dry-docking | Maximum    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated useful life   5 years
crude oil tanker    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated scrap value per LDT (in USD per Tonne)   390
crude oil tanker | Reassessment of residual values of vessels    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated scrap value per LDT (in USD per Tonne) 460  
Chemical tankers    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated scrap value per LDT (in USD per Tonne)   420
Chemical tankers | Reassessment of residual values of vessels    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated scrap value per LDT (in USD per Tonne) 470  
Dry bulk vessels    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated scrap value per LDT (in USD per Tonne)   410
Dry bulk vessels | Reassessment of residual values of vessels    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated scrap value per LDT (in USD per Tonne) 460  
Container vessels    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated scrap value per LDT (in USD per Tonne)   430
Container vessels | Reassessment of residual values of vessels    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated scrap value per LDT (in USD per Tonne) 480