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PROVISIONS - Narrative (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of other provisions [line items]      
Total provisions $ 476.7 $ 394.7  
Current portion of provisions 6.5 6.7  
Non-current provisions 470.2 388.0  
Asset retirement obligations      
Disclosure of other provisions [line items]      
Total provisions 460.4 380.0 $ 368.4
Current portion of provisions 6.5 6.7  
Non-current provisions 453.9 373.3  
Other      
Disclosure of other provisions [line items]      
Total provisions $ 16.3 $ 14.7