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ASSET RETIREMENT OBLIGATION: (Details)
$ in Millions
1 Months Ended 6 Months Ended 12 Months Ended
Mar. 19, 2025
Apr. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
item
Jun. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Jan. 31, 2025
USD ($)
ASSET RETIREMENT OBLIGATION:            
Percentage of guarantee for Lima office complex     27.00%      
Percentage of security for letter of credit     73.00%      
Total guarantees           $ 98.5
Period for updation of guarantee constitution table 3 years          
Asset retirement obligation activity            
Balance at the beginning of the year     $ 546.1 $ 612.6 $ 612.6  
Changes in estimates     (48.5) (7.7)    
Accretion expense     12.2 14.3    
Balance at the end of the year     $ 509.9 $ 619.2 546.1  
Peru            
ASSET RETIREMENT OBLIGATION:            
Number of units with future closure costs recognized as an asset retirement obligation | item     3      
Period after which successive reviews are required by the law (in years)     5 years      
Change in asset retirement liability   $ (3.2)        
Mexico            
Asset retirement obligation activity            
Changes in estimates         $ (119.2)