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BUSINESS SEGMENTS INFORMATION (Business Segments Narrative) (Details) - USD ($)
$ in Millions
4 Months Ended 12 Months Ended
Apr. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Mining Segment Reporting Information [Line Items]        
Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization   $ 12,016 $ 10,031 $ 11,534
Inventory, Copper Metal Production | Product Concentration Risk | Morenci        
Mining Segment Reporting Information [Line Items]        
Concentration risk percentage   16.00%    
Inventory, Copper Metal Production | Product Concentration Risk | Cerro Verde        
Mining Segment Reporting Information [Line Items]        
Concentration risk percentage   23.00%    
North America | Inventory, Copper Metal Production | Product Concentration Risk | Morenci        
Mining Segment Reporting Information [Line Items]        
Concentration risk percentage   43.00%    
North America | Cost of Goods, Product Line | Supplier Concentration Risk | Atlantic Copper Smelting & Refining        
Mining Segment Reporting Information [Line Items]        
Concentration risk percentage   18.00%    
South America | Inventory, Copper Metal Production | Product Concentration Risk | Cerro Verde        
Mining Segment Reporting Information [Line Items]        
Concentration risk percentage   85.00%    
South America | Cost of Goods, Product Line | Supplier Concentration Risk | Atlantic Copper Smelting & Refining        
Mining Segment Reporting Information [Line Items]        
Concentration risk percentage   7.00%    
Indonesia | Cost of Goods, Product Line | Supplier Concentration Risk | Atlantic Copper Smelting & Refining        
Mining Segment Reporting Information [Line Items]        
Concentration risk percentage   9.00%    
PT Smelting        
Mining Segment Reporting Information [Line Items]        
Deferred intercompany profit 25.00% 39.50%