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OWNERSHIP IN SUBSIDIARIES AND JOINT VENTURES - PT-FI Divestment (Details) - USD ($)
$ in Millions
12 Months Ended 24 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Jan. 01, 2023
Feb. 15, 2022
Dec. 21, 2018
Summary of investment holdings [Line Items]              
Net income (loss) $ 5,365 $ 865 $ (189)        
Payments of Dividends     0        
PT Freeport Indonesia              
Summary of investment holdings [Line Items]              
Ownership percentage 48.76%           81.00%
Net income (loss) $ 2,400 765 203 $ 2,900      
Net Income (Loss) Attributable to Parent 2,000 621 $ 165 $ 2,300      
Payments of Dividends 1,300            
PT Freeport Indonesia | Intersegment Eliminations [Member]              
Summary of investment holdings [Line Items]              
Payments of Dividends $ 1,000 $ 0          
Forecast | PT Freeport Indonesia              
Summary of investment holdings [Line Items]              
Ownership percentage         48.76%    
PT Freeport Indonesia              
Summary of investment holdings [Line Items]              
Ownership percentage of subsidiary             48.76%
PT Freeport Indonesia | Forecast              
Summary of investment holdings [Line Items]              
Ownership percentage of subsidiary           81.00%  
PT Freeport Indonesia | Forecast | Beyond 2022              
Summary of investment holdings [Line Items]              
Ownership percentage of subsidiary           48.67%  
PT Freeport Indonesia | PT Freeport Indonesia              
Summary of investment holdings [Line Items]              
Ownership percentage of subsidiary 48.76%            
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 Asahan Aluminium (Persero) (Inalum) | Forecast              
Summary of investment holdings [Line Items]              
Ownership percentage         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 Indonesia Papua Metal dan Mineral | Forecast              
Summary of investment holdings [Line Items]              
Ownership percentage         25.00%    
PT Freeport Indonesia | PT Freeport Indonesia              
Summary of investment holdings [Line Items]              
Ownership interest by parent subsequent to business acquisition             51.24%