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COMMITMENTS AND CONTINGENCIES (Details)
$ in Millions
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jun. 02, 2016
lawsuit
Commitments and contingencies      
Future operating lease obligations $ 39.4 $ 32.2  
Commitments for capital expenditures 424.1 92.8  
Future purchase commitments $ 1,617.1 $ 787.4  
Compania Minera Maricunga ("CMM") | Other regulatory matters      
Commitments and contingencies      
Number of lawsuits | lawsuit     2