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INCOME TAXES - Components of Income Tax Expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Current income tax $ 45.3 $ 55.8
Deferred income tax (109.8) (11.7)
Total income tax expense (recovery) (64.5) 44.1
Domestic Country    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Current income tax 0.3 2.9
Deferred income tax - origination and reversal of temporary differences 0.0 0.0
Foreign Country    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Current income tax 45.0 52.9
Deferred income tax - origination and reversal of temporary differences $ (109.8) $ (11.7)