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Contingencies and Commitments (Unaudited) (Details) | 3 Months Ended
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Mar. 31, 2017 USD ($)
Loss Contingencies [Line Items] |
Progressive Export Duty on Copper Concentrates, Lower Threshold, Percent | 5.00%
PT Freeport Indonesia [Member] |
Loss Contingencies [Line Items] |
Income Tax Examination, Penalties and Interest Accrued | $ 0
National Superintendency of Tax Administration (SUNAT) [Member] | Relating to Tax Periods 2006 Through 2013 [Member] | Cerro Verde [Member] |
Loss Contingencies [Line Items] |
Income Tax Examination, Penalties and Interest Accrued | 573,000,000
Tax Authority, In Papau, Indonesia [Member] | Relating to 2011 through 2015 [Member] | PT Freeport Indonesia [Member] |
Loss Contingencies [Line Items] |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 380,000,000
Income tax examination, interest accrued | 229,000,000
Tax Authority, In Papau, Indonesia [Member] | Relating to August 2015 through March 2017 [Member] [Member] | PT Freeport Indonesia [Member] |
Loss Contingencies [Line Items] |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | $ 109,000,000

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