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CAPITAL AND FINANCIAL RISK MANAGEMENT - Currency risk management impact on OCI (Details) - Currency risk - Foreign currency forward and collar contracts
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
Capital and financial risk management  
Percentage of reasonably possible increase in risk assumption 10.00%
Percentage of reasonably possible decrease in risk assumption 10.00%
Canadian dollars  
Capital and financial risk management  
Strengthening in U.S dollar Effect on OCI before taxes, gain (loss) $ (6.1)
Weakening in U.S dollar Effect on OCI before taxes, gain (loss) 7.4
Brazilian real  
Capital and financial risk management  
Strengthening in U.S dollar Effect on OCI before taxes, gain (loss) (6.8)
Weakening in U.S dollar Effect on OCI before taxes, gain (loss) 7.5
Chilean peso  
Capital and financial risk management  
Strengthening in U.S dollar Effect on OCI before taxes, gain (loss) (4.4)
Weakening in U.S dollar Effect on OCI before taxes, gain (loss) 4.8
Russian roubles  
Capital and financial risk management  
Strengthening in U.S dollar Effect on OCI before taxes, gain (loss) (3.7)
Weakening in U.S dollar Effect on OCI before taxes, gain (loss) $ 5.5