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COMMITMENTS AND CONTINGENCIES: - Environmental matters (Details)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Dec. 31, 2011
category
person
Environmental costs      
Environmental capital investment $ 94.8 $ 47.4  
Peru      
Environmental costs      
Environmental capital investment 2.0 3.5  
Mexico      
Environmental costs      
Environmental capital investment $ 92.8 $ 43.9  
Number of categories of collective actions | category     3
Minimum number of people claiming injury due to collective action initiative in Civil Federal Procedures Code (CFPC) | person     30