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Contingencies and Commitments (Unaudited) (Details) - PT Freeport Indonesia [Member] IDR in Trillions | Oct. 31, 2015 USD ($) | Oct. 31, 2015 IDR | Sep. 30, 2015 USD ($)
--- | --- | --- | ---
Loss Contingencies [Line Items] |  |  |
Income Tax Examination, Penalties Accrued |  |  | $ 0
Subsequent Event [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Assessment By Foreign Government Of Alleged Obligations | $ 177,000,000 |  |
Assessment By Foreign Government of Alleged Obligations, Expressed in Foreign Currency | IDR |  | IDR 2.6 |

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- Definition The amount of estimated penalties accrued as of the balance sheet date arising from income tax examinations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Details
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- Details
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