v3.26.1
VESSELS AND CAPITALIZED DRY-DOCKING - Schedule of Vessel and Capitalized Dry-Docking (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Reconciliation of changes in property, plant and equipment      
Balance as of beginning of period $ 2,821.9    
Balance as of ending of period 2,962.8 $ 2,704.8 $ 2,821.9
Vessels and capitalized dry docking      
Reconciliation of changes in property, plant and equipment      
Balance as of beginning of period 2,792.2    
Balance as of ending of period 2,918.8 2,691.7 2,792.2
Cost | Vessels and capitalized dry docking | Property, plant and equipment      
Reconciliation of changes in property, plant and equipment      
Balance as of beginning of period 3,551.1 3,500.9 3,500.9
Additions 190.9 58.6 298.4
Disposals (5.3) (22.1) (29.7)
Transferred from prepayments 53.1 0.0 3.4
Transferred to assets held for sale 0.0 (160.4) (221.9)
Balance as of ending of period 3,789.8 3,377.0 3,551.1
Depreciation | Vessels and capitalized dry docking | Property, plant and equipment      
Reconciliation of changes in property, plant and equipment      
Balance as of beginning of period (748.3) (660.6) (660.6)
Disposals 5.3 22.0 29.7
Depreciation for the period 117.4 102.6 209.1
Transferred to assets held for sale 0.0 67.3 91.7
Balance as of ending of period (860.4) (673.9) (748.3)
Impairment | Vessels and capitalized dry docking | Property, plant and equipment      
Reconciliation of changes in property, plant and equipment      
Balance as of beginning of period (10.6) (13.6) (13.6)
Transferred to assets held for sale 0.0 2.2 3.0
Balance as of ending of period $ (10.6) $ (11.4) $ (10.6)