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COMMITMENTS AND GUARANTEES (Mining Contracts) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Contractual obligations mining contracts [line items] |  |  |
Number of Extention Periods Available Under Mining Contract | 2 |  |
PT Freeport Indonesia [Member] |  |  |
Contractual obligations mining contracts [line items] |  |  |
Period For Option To Extend Mining Contract | 10 years |  |
Number Of Years Working With Foreign Government | 40 years |  |
Gold And Silver Sales Royalty Rate (in hundredths) | 1.00% |  |
Quantity of ore produced subject to additional royalties | 200,000 |  |
Royalty Expense | $ 109 | $ 93 | $ 137
Product Exports Ban, Date | Jan. 12, 2017 |  |
Tenke Fungurume [Member] |  |  |
Contractual obligations mining contracts [line items] |  |  |
Royalty Expense | 29 | 25 | 24
Royalty Rate Payable Under Amended And Restated Mining Convention (in hundredths) | 2.00% |  |
Percentage of mining property owned by the company | 56.00% | 57.75% |
Conversion of intercompany loans | $ 50 |  |
Minimum [Member] | PT Freeport Indonesia [Member] |  |  |
Contractual obligations mining contracts [line items] |  |  |
Copper Royalty Rate Payable (in hundredths) | 1.50% |  |
Price Of Copper Per Pound | 0.90 |  |
Progressive Export Duty on Copper Concentrates, Percent | 25.00% |  |
Maximum [Member] | PT Freeport Indonesia [Member] |  |  |
Contractual obligations mining contracts [line items] |  |  |
Copper Royalty Rate Payable (in hundredths) | 3.50% |  |
Price Of Copper Per Pound | 1.10 |  |
Progressive Export Duty on Copper Concentrates, Percent | 60.00% |  |

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