XML 59 R41.htm IDEA: XBRL DOCUMENT v3.10.0.1
Contingencies and Commitments (Unaudited) Tax and Other Matters (Details) - USD ($)
3 Months Ended 9 Months Ended 15 Months Ended 57 Months Ended
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2017
Loss Contingencies [Line Items]              
Other assets   $ 2,460,000,000   $ 2,460,000,000 $ 2,460,000,000   $ 2,270,000,000
Payments for Legal Settlements   32,000,000 $ 32,000,000        
PT Freeport Indonesia [Member]              
Loss Contingencies [Line Items]              
Other assets   300,000,000   300,000,000 300,000,000    
PT Freeport Indonesia [Member] | Relating to January 2016 through April 2016 [Member] | Tax Authority, In Papau, Indonesia [Member]              
Loss Contingencies [Line Items]              
Loss Contingency, Estimate of Possible Loss           $ 12,000,000 $ 20,000,000
Change in Loss Contingency, percent           40.00%  
PT Freeport Indonesia [Member] | Relating to August 2015 through March 2018 [Member] | Tax Authority, In Papau, Indonesia [Member]              
Loss Contingencies [Line Items]              
Loss Contingency, Estimate of Possible Loss   173,000,000   173,000,000 173,000,000    
Loss Contingency Accrual   0   0 0    
PT Freeport Indonesia [Member] | Relating to August 2015 through March 2018 [Member] | Tax Authority, In Papau, Indonesia [Member] | Penalties [Member]              
Loss Contingencies [Line Items]              
Loss Contingency, Estimate of Possible Loss   87,000,000   87,000,000 87,000,000    
PT Freeport Indonesia [Member] | Relating to 2011 through 2017 [Member] | Tax Authority, In Papau, Indonesia [Member]              
Loss Contingencies [Line Items]              
Loss Contingency, Estimate of Possible Loss   212,000,000   212,000,000 212,000,000    
Judicial Ruling [Member] | Cerro Verde Royalty Dispute [Member] | Royalty Assessments [Member]              
Loss Contingencies [Line Items]              
Loss Contingency, Loss in Period       244,000,000      
Judicial Ruling [Member] | Cerro Verde Royalty Dispute [Member] | Unfavorable Regulatory Action [Member]              
Loss Contingencies [Line Items]              
Loss Contingency, Loss in Period $ 357,000,000   $ 357,000,000 487,000,000      
Loss Contingency, Loss in Period, Including Tax Charges       355,000,000      
Loss Contingency, Loss In Period, Attributable To Parent       187,000,000      
Judicial Ruling [Member] | Cerro Verde Royalty Dispute [Member] | Royalty Assessments, Penalties And Interests [Member]              
Loss Contingencies [Line Items]              
Loss Contingency, Loss in Period       158,000,000      
Judicial Ruling [Member] | Cerro Verde Royalty Dispute [Member] | Royalty Assessments, Taxes [Member]              
Loss Contingencies [Line Items]              
Loss Contingency, Loss in Period       85,000,000      
Judicial Ruling [Member] | Cerro Verde Royalty Dispute [Member] | Tax Year 2006 To Tax Year 2008 [Member] | Royalty Assessments [Member]              
Loss Contingencies [Line Items]              
Payments for Legal Settlements         177,000,000    
Pending Litigation [Member] | Cerro Verde Royalty Dispute [Member] | Tax Year 2009 to Tax Year 2013 [Member]              
Loss Contingencies [Line Items]              
Loss Contingency, Estimate of Possible Loss   406,000,000   406,000,000 406,000,000    
Parent Company [Member] | Pending Litigation [Member] | Cerro Verde Royalty Dispute [Member] | Tax Year 2009 to Tax Year 2013 [Member]              
Loss Contingencies [Line Items]              
Loss Contingency, Estimate of Possible Loss   $ 217,000,000   $ 217,000,000 $ 217,000,000