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Current and long-term debt - Narrative (Details)
 24 Months Ended
Dec. 31, 2023
vessel
Disclosure of detailed information about borrowings [line items]  
Number of ships, purchase option exercised and lease obligation repaid 53
Top of range  
Disclosure of detailed information about borrowings [line items]  
Adjustment to interest rate basis 0.26161%
Top of range | Secured Overnight Financing Rate (SOFR)  
Disclosure of detailed information about borrowings [line items]  
Adjustment to interest rate basis 0.26161%
Bottom of range | Secured Overnight Financing Rate (SOFR)  
Disclosure of detailed information about borrowings [line items]  
Adjustment to interest rate basis 0.00%