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CONTINGENCIES (Royalty Dispute Schedule) (Details) - USD ($)
$ in Millions
12 Months Ended 36 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Loss Contingencies [Line Items]        
Production and delivery $ 11,514 $ 11,687 $ 10,258  
Interest expense, net 620 945 801  
Provision for (benefit from) income taxes (510) (991) (883)  
Net income from continuing operations attributable to noncontrolling interests (50) (292) (274)  
Cerro Verde        
Loss Contingencies [Line Items]        
Loss Contingency, Loss in Period 16      
Provision for (benefit from) income taxes 2      
Cerro Verde | Cerro Verde Royalty Dispute | Royalty Assessments        
Loss Contingencies [Line Items]        
Production and delivery 6 14 203 $ 223
Interest expense, net 10 370 145 525
Other expense 0 22 0 22
Provision for (benefit from) income taxes 2 35 (7) 30
Net income from continuing operations attributable to noncontrolling interests 7 176 169 352
Loss contingency, loss In period, attributable to parent 7 195 186 $ 388
Interest costs, installment payment program $ 58      
December 2006 To September 2011 | Cerro Verde | Cerro Verde Royalty Dispute | Royalty Assessments        
Loss Contingencies [Line Items]        
Production and delivery     175  
October 2011 to 2013 | Cerro Verde | Cerro Verde Royalty Dispute | Royalty Assessments        
Loss Contingencies [Line Items]        
Provision for (benefit from) income taxes     (136)  
October 2011 to 2013 | Cerro Verde | Cerro Verde Royalty Dispute | Disputed Royalty Assessments [Member]        
Loss Contingencies [Line Items]        
Provision for (benefit from) income taxes     69  
October 2011 to 2013 | Cerro Verde | Cerro Verde Royalty Dispute | Royalty Assessments, Taxes [Member]        
Loss Contingencies [Line Items]        
Provision for (benefit from) income taxes     67  
December 2006 to Tax Year 2013 | Cerro Verde | Cerro Verde Royalty Dispute | Royalty Assessments        
Loss Contingencies [Line Items]        
Provision for (benefit from) income taxes     129  
Judicial Ruling | December 2006 to Tax Year 2013 | Cerro Verde Royalty Dispute | Unfavorable Regulatory Actions        
Loss Contingencies [Line Items]        
Loss Contingency, Loss in Period     348  
Provision for (benefit from) income taxes   $ (35) (7)  
Net income from continuing operations attributable to noncontrolling interests     $ 169