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Material accounting policies - Assumptions and estimation uncertainties (Details)
12 Months Ended
Dec. 31, 2023
Disclosure of detailed information about property, plant and equipment [line items]  
Scrap value estimate, historical average period used 4 years
tankers  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful life 20 years
tankers | Forecast  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful life 20 years