v3.25.2
VESSELS AND CAPITALIZED DRY-DOCKING - Schedule of Vessel and Capitalized Dry-Docking (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Reconciliation of changes in property, plant and equipment      
Balance as of beginning of period $ 2,842.7    
Balance as of ending of period 2,704.8 $ 2,540.2 $ 2,842.7
Vessels and capitalized dry docking      
Reconciliation of changes in property, plant and equipment      
Balance as of beginning of period 2,826.7    
Balance as of ending of period 2,691.7 2,528.7 2,826.7
Cost | Vessels and capitalized dry docking | Property, plant and equipment      
Reconciliation of changes in property, plant and equipment      
Balance as of beginning of period 3,500.9 2,622.1 2,622.1
Additions 58.6 428.3 792.7
Disposals (22.1) (7.2) (20.7)
Transferred from prepayments 0.0 141.0 197.5
Transferred to assets held for sale (160.4) (43.7) (90.7)
Balance as of ending of period 3,377.0 3,140.5 3,500.9
Depreciation | Vessels and capitalized dry docking | Property, plant and equipment      
Reconciliation of changes in property, plant and equipment      
Balance as of beginning of period (660.6) (536.3) (536.3)
Disposals 22.0 7.2 20.7
Depreciation for the period 102.6 87.5 186.7
Transferred to assets held for sale 67.3 19.5 41.7
Balance as of ending of period (673.9) (597.1) (660.6)
Impairment | Vessels and capitalized dry docking | Property, plant and equipment      
Reconciliation of changes in property, plant and equipment      
Balance as of beginning of period (13.6) (15.6) (15.6)
Transferred to assets held for sale 2.2 0.9 2.0
Balance as of ending of period $ (11.4) $ (14.7) $ (13.6)