v3.25.1
COMMITMENTS AND CONTINGENCIES: - Others (Details)
S/ in Millions, $ in Millions
 1 Months Ended 3 Months Ended
Feb. 20, 2020
MWh
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2018
USD ($)
T
May 31, 2016
MW
Jul. 31, 2014
MW
Jun. 30, 2014
MW
Mar. 31, 2025
USD ($)
item
Mar. 31, 2025
PEN (S/)
item
Mar. 31, 2025
PEN (S/)
Other commitments:                    
Commitment for capital projects | $               $ 305.2    
Peru | Power purchase agreements | Electroperu S.A                    
Other commitments:                    
Purchase agreement, contracted power capacity (in megawatts) | MW             120      
Term of power purchase agreement related to sale of power plant             20 years      
Peru | Power purchase agreements | Kallpa                    
Other commitments:                    
Purchase agreement, contracted power capacity (in megawatts) | MW           120        
Term of power purchase agreement related to sale of power plant           10 years        
Peru | Power purchase agreements | Kallpa | Maximum                    
Other commitments:                    
Purchase agreement, contracted power capacity (in megawatts) | MW         80          
Mexico | Power purchase agreements | Parque Eolico de Fenicias, S. de R.L. de C.V                    
Other commitments:                    
Term of power purchase agreement related to sale of power plant 20 years                  
Purchase agreement, contracted power capacity (in megawatts per year) | MWh 611,400                  
Michiquillay                    
Other commitments:                    
Pre-operational period   12 years                
Extended pre-operational period   3 years                
Investment in projects in next five years | $   $ 20.0                
Period of investment in projects   5 years                
Number of meters drilled               145,928 145,928  
Number of drill core samples obtained               47,990 47,990  
Michiquillay | Peru | Copper                    
Other commitments:                    
Contingent contractual obligation | $       $ 400.0            
Estimated mineralized material (in tons) | T       2,288,000,000            
Copper grade percentage       0.43%            
Annual production (in tons) | T       225,000            
Initial mine life       25 years            
Contractual obligation paid on project | $     $ 12.5 $ 12.5            
Remaining amount to pay if project is developed | $     $ 375.0              
Toquepala Concentrator Expansion | Peru                    
Other commitments:                    
Amount committed to funding for social and infrastructure improvement projects               $ 121.0 S/ 445.0  
Commitment liability recorded in the balance sheet | $               28.5    
Toquepala Concentrator Expansion | Peru | Educational Project                    
Other commitments:                    
Amount committed to funding for social and infrastructure improvement projects               5.1 18.8  
Toquepala Concentrator Expansion | Peru | Agricultural Projects                    
Other commitments:                    
Amount committed to funding for social and infrastructure improvement projects               30.6 112.4  
Toquepala Concentrator Expansion | Peru | Construction of Cularjahuira Dam                    
Other commitments:                    
Amount committed to funding for social and infrastructure improvement projects               4.2 15.6  
Toquepala Concentrator Expansion | Peru | Study of Engineering for Collazas Dam                    
Other commitments:                    
Amount committed to funding for social and infrastructure improvement projects               0.7 2.6  
Toquepala Concentrator Expansion | Peru | Infrastructure Projects                    
Other commitments:                    
Amount committed to funding for social and infrastructure improvement projects               16.5 60.6  
Toquepala Concentrator Expansion | Peru | Drinking Water Project                    
Other commitments:                    
Amount committed to funding for social and infrastructure improvement projects               2.6 9.6  
Toquepala Concentrator Expansion | Peru | Construction of a high-achievement school                    
Other commitments:                    
Amount committed to funding for social and infrastructure improvement projects               27.8 102.1  
Toquepala Concentrator Expansion | Peru | Works for Taxes                    
Other commitments:                    
Amount committed to funding for social and infrastructure improvement projects               $ 10.9 S/ 40.0  
Number of infrastructure projects agreed for construction               2 2  
Development Fund Moquegua Region | Peru                    
Other commitments:                    
Amount committed to funding for social and infrastructure improvement projects               $ 271.9 S/ 1,000.0  
Amount committed to funding for school projects               $ 4.9 S/ 18.2  
Number of schools agreed for construction               3 3  
Development Fund Moquegua Region | Peru | Educational Project                    
Other commitments:                    
Amount committed to funding for social and infrastructure improvement projects               $ 29.5 S/ 108.4  
Amount of investment in project               29.0   S/ 106.8
Development Fund Moquegua Region | Peru | Works for Taxes                    
Other commitments:                    
Amount committed to funding for social and infrastructure improvement projects               $ 62.0 S/ 228.0  
Number of infrastructure projects agreed for construction               4 4  
Development Fund Moquegua Region | Peru | Funding for Different Projects                    
Other commitments:                    
Amount committed to funding for social and infrastructure improvement projects               $ 68.3 S/ 251.3  
Development Fund Moquegua Region | Peru | Water Treatment                    
Other commitments:                    
Amount committed to funding for social and infrastructure improvement projects               $ 28.7 S/ 105.5  
Percentage of progress on construction               55.00% 55.00%  
Apurimac Region | Works for Taxes                    
Other commitments:                    
Amount committed to funding for school projects               $ 22.8 S/ 83.8  
Number of schools agreed for construction               2 2  
Arequipa Region | Works for Taxes                    
Other commitments:                    
Amount committed to funding for school projects               $ 29.8 S/ 109.5  
Number of schools agreed for construction               2 2  
Amount committed to Finance for past infrastructure project               $ 1.7 S/ 6.3  
Cajamarca Region | Works for Taxes                    
Other commitments:                    
Amount committed for funding health projects               $ 0.2 S/ 0.7