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PREPAYMENTS ON VESSELS (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Disclosure of detailed information about property, plant and equipment [line items]      
Balance $ 12.0 $ 12.0 $ 12.0
Additions 43.1 22.8 78.6
Transferred to vessels (50.8) (1.6) (78.6)
Balance $ 4.3 $ 33.2 $ 12.0