XML 129 R89.htm IDEA: XBRL DOCUMENT v3.20.4
CONTINGENCIES (Tax Matters by Tax Year) (Details) - USD ($)
$ in Millions
 12 Months Ended 21 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 21, 2018
Income Tax Examination [Line Items]        
Income Taxes Receivable, Noncurrent $ 106 $ 290    
Export Duties Expense $ 92 221 $ 180  
PT-FI        
Income Tax Examination [Line Items]        
Progressive export duty on copper concentrates, higher threshold, percent 5.00%     7.50%
Export Duties Expense $ 92 66 $ 180  
SUNAT | Cerro Verde        
Income Tax Examination [Line Items]        
Income Taxes Receivable, Noncurrent 433      
Tax Assessment 295      
Penalty and Interest Assessment 443      
Total 738      
SUNAT | 2003 to 2008 | Cerro Verde        
Income Tax Examination [Line Items]        
Tax Assessment 50      
Penalty and Interest Assessment 129      
Total 179      
SUNAT | 2009 | Cerro Verde        
Income Tax Examination [Line Items]        
Tax Assessment 56      
Penalty and Interest Assessment 52      
Total 108      
SUNAT | 2010 | Cerro Verde        
Income Tax Examination [Line Items]        
Tax Assessment 54      
Penalty and Interest Assessment 118      
Total 172      
SUNAT | 2011 | Cerro Verde        
Income Tax Examination [Line Items]        
Tax Assessment 42      
Penalty and Interest Assessment 78      
Total 120      
SUNAT | 2014 to 2020 | Cerro Verde        
Income Tax Examination [Line Items]        
Tax Assessment 45      
Penalty and Interest Assessment 0      
Total 45      
SUNAT | 2013 | Cerro Verde        
Income Tax Examination [Line Items]        
Tax Assessment 48      
Penalty and Interest Assessment 66      
Total 114      
Indonesia Tax Authority | PT-FI        
Income Tax Examination [Line Items]        
Tax Assessment 969      
Interest Assessment 269      
Total 1,238      
Indonesia Tax Authority | 2012 | PT-FI        
Income Tax Examination [Line Items]        
Tax Assessment 97      
Interest Assessment 0      
Total 97      
Indonesia Tax Authority | 2005 | PT-FI        
Income Tax Examination [Line Items]        
Tax Assessment 62      
Interest Assessment 30      
Total 92      
Indonesia Tax Authority | 2007 | PT-FI        
Income Tax Examination [Line Items]        
Tax Assessment 48      
Interest Assessment 23      
Total 71      
Indonesia Tax Authority | 2009, 2010 to 2011 | PT-FI        
Income Tax Examination [Line Items]        
Tax Assessment 31      
Interest Assessment 8      
Total 39      
Indonesia Tax Authority | 2013 | PT-FI        
Income Tax Examination [Line Items]        
Tax Assessment 152      
Interest Assessment 76      
Total 228      
Indonesia Tax Authority | 2014 | PT-FI        
Income Tax Examination [Line Items]        
Tax Assessment 123      
Interest Assessment 0      
Total 123      
Indonesia Tax Authority | 2015 | PT-FI        
Income Tax Examination [Line Items]        
Tax Assessment 159      
Interest Assessment 0      
Total 159      
Indonesia Tax Authority | 2016 | PT-FI        
Income Tax Examination [Line Items]        
Tax Assessment 257      
Interest Assessment 113      
Total 370      
Indonesia Tax Authority | 2017 | PT-FI        
Income Tax Examination [Line Items]        
Tax Assessment 40      
Interest Assessment 19      
Total 59      
PT-FI        
Income Tax Examination [Line Items]        
Income Taxes Receivable, Noncurrent $ 143 $ 178