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DISPOSITIONS AND ACQUISITIONS (PT Smelting) (Details)
t in Millions, $ in Millions
Sep. 01, 2021
USD ($)
Apr. 30, 2021
USD ($)
Dec. 31, 2021
Nov. 30, 2021
t
Asset Acquisition [Line Items]        
Noncash or Part Noncash Divestiture, Amount of Consideration Received $ 35.0      
PT Smelting        
Asset Acquisition [Line Items]        
Ownership percentage   39.50% 25.00%  
PT Smelting        
Asset Acquisition [Line Items]        
Percentage of voting interest   14.50%    
Payments to Acquire Additional Interest in Subsidiaries   $ 33.0    
Expansion Of Smelter Capacity, Percent       30.00%
Expansion Of Smelter Capacity | t       1.3