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OWNERSHIP IN SUBSIDIARIES AND JOINT VENTURES - PT-FI Divestment (Details)
$ in Millions
12 Months Ended 48 Months Ended
Dec. 31, 2023
oz
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2022
USD ($)
Dec. 21, 2018
Summary of investment holdings [Line Items]            
Net income   $ 4,479 $ 5,365 $ 865    
PT Freeport Indonesia            
Summary of investment holdings [Line Items]            
Net income         $ 6,000  
PT Freeport Indonesia            
Summary of investment holdings [Line Items]            
Ownership percentage   48.76%     48.76% 81.00%
Net income (loss) attributable to parent         $ 4,900  
PT Freeport Indonesia            
Summary of investment holdings [Line Items]            
Ownership percentage of subsidiary   81.00%     81.00% 48.76%
PT Freeport Indonesia | Beyond 2022            
Summary of investment holdings [Line Items]            
Ownership percentage of subsidiary   48.76%     48.76%  
Freeport McMoRan Corporation            
Summary of investment holdings [Line Items]            
Ownership percentage of subsidiary           48.76%
PT Indonesia Asahan Aluminium (Persero) (Inalum)            
Summary of investment holdings [Line Items]            
Ownership percentage of subsidiary           26.24%
PT Indonesia Papua Metal dan Mineral            
Summary of investment holdings [Line Items]            
Ownership percentage of subsidiary           25.00%
PT Freeport Indonesia | Forecast            
Summary of investment holdings [Line Items]            
Sale of gold | oz 190,000          
PT Freeport Indonesia | PT Freeport Indonesia            
Summary of investment holdings [Line Items]            
Ownership percentage of subsidiary   48.76%     48.76%  
PT Freeport Indonesia | Freeport McMoRan Corporation | Forecast            
Summary of investment holdings [Line Items]            
Portion of gold sales attributable to noncontrolling interest 81.00%          
PT Freeport Indonesia | PT Indonesia Asahan Aluminium (Persero) (Inalum) | Forecast            
Summary of investment holdings [Line Items]            
Portion of gold sales attributable to noncontrolling interest 19.00%          
PT Freeport Indonesia, Subsidiary | PT Freeport Indonesia            
Summary of investment holdings [Line Items]            
Ownership percentage           19.00%
Interest In PT Indocopper Investama | PT Indonesia Asahan Aluminium (Persero) (Inalum)            
Summary of investment holdings [Line Items]            
Percentage of voting interest           100.00%
PT Freeport Indonesia | PT Indonesia Asahan Aluminium (Persero) (Inalum)            
Summary of investment holdings [Line Items]            
Ownership interest by parent subsequent to business acquisition           26.24%
PT Freeport Indonesia | PT Indonesia Papua Metal dan Mineral            
Summary of investment holdings [Line Items]            
Ownership interest by parent subsequent to business acquisition           25.00%
PT Freeport Indonesia | PT Freeport Indonesia            
Summary of investment holdings [Line Items]            
Ownership interest by parent subsequent to business acquisition           51.24%