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COMMON SHARE CAPITAL - Dividends on common shares (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Feb. 15, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2022
Dec. 31, 2021
COMMON SHARE CAPITAL              
Dividend declared and paid, per share   $ 0.03 $ 0.03 $ 0.03 $ 0.03   $ 0.03
Dividend declared and paid, Total amount paid   $ 37.1 $ 39.0 $ 39.0 $ 38.9 $ 154.0 $ 151.1
Dividend declared, per share $ 0.03            
Dividend declared and unpaid   $ 0.0       $ 0.0 $ 0.0