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Events occurring after balance sheet date (Details) - Subsequent Event [Member]
$ / shares in Units, $ in Millions
1 Months Ended
Mar. 19, 2025
shares
Jan. 22, 2025
Jan. 14, 2025
USD ($)
Jan. 13, 2025
USD ($)
Feb. 24, 2025
$ / shares
shares
Events after reporting period [Abstract]          
Share repurchases (in shares) | shares         3,952,255
Average price (in dollars per share) | $ / shares         $ 5.14
Number of share options granted (in shares) | shares 2,488,395        
Investment in Diginex Solutions (HK) Limited ("Diginex") [Member]          
Events after reporting period [Abstract]          
Ownership interest   1.15%      
Lock-up period   12 months      
IMO II MR vessel, Hafnia Tanzanite [Member]          
Events after reporting period [Abstract]          
Extinguishment of an existing sale and leaseback-liability | $       $ 17.8  
IMO II MR vessel, Hafnia Tourmaline [Member]          
Events after reporting period [Abstract]          
Extinguishment of an existing sale and leaseback-liability | $     $ 17.1