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INVENTORIES, INCLUDING LONG-TERM MILL AND LEACH STOCKPILES (Components of Inventories) (Details)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
$ / shares
lb
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Components of Inventories [Line Items]      
Total materials and supplies, net $ 1,669 $ 1,594  
Mill stockpiles 193 205  
Inventory, Ore Stockpiles on Leach Pads, Gross 977 809  
Total current mill and leach stockpiles 1,170 1,014  
Raw materials (primarily concentrate) 536 366  
Work-in-process 195 174  
Finished goods 927 745  
Total product 1,658 1,285  
Mill stockpiles 226 223  
Leach stockpiles 1,161 1,240  
Total long-term inventories 1,387 1,463  
Inventory obsolescence reserves 36 32  
Metals inventory adjustments $ 16 96 $ 179
Increase in recoverable copper in leach stockpiles | lb 191,000,000    
Increase in net income as a result of recoverable inventory $ 112    
Increase in earnings per share as a result of increased recoverable inventory | $ / shares $ 0.08    
Molybdenum      
Components of Inventories [Line Items]      
Metals inventory adjustments   (38) (84)
Cobalt      
Components of Inventories [Line Items]      
Metals inventory adjustments     (58)
Copper      
Components of Inventories [Line Items]      
Metals inventory adjustments   $ (58) $ (37)