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OTHER ASSETS (Details) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2010
Schedule Of Other Assets [Line Items] |  |  |  |  |
Legally restricted funds | $ 392 | [1] | $ 163 | [1] |
Intangible assets | 380 | [2] | 334 | [2] |
Disputed tax assessments | 327 | [3] | 177 | [3] |
Investments: [Abstract] |  |  |  |  |
Available-for-sale securities | 44 |  | 46 |  |
Other | 63 |  | 51 |  |
Long-term receivable for income tax refunds | 77 |  | 317 |  |
Loan to a DRC public electric utility | 152 |  | 149 |  |
Debt issue costs | 107 |  | 26 |  |
Loan to Gécamines (related party) | 34 |  | 32 |  |
Deferred tax assets | 2 |  | 220 |  |
Other | 149 |  | 139 |  |
Total other assets | 1,798 |  | 2,189 |  |
Finite-Lived Intangible Assets, Accumulated Amortization | 57 |  | 71 |  |
Legally restricted funds for asset retirement obligations at New Mexico mines | 158 |  | 161 |  |
McMoRan Exploration Co [Member] |  |  |  |  |
Investments: [Abstract] |  |  |  |  |
Cost-method investment | 0 | [4] | 446 | [4] |
Number of shares of 5.75% Convertible Perpetual Preferred Stock purchased |  |  |  |  | 500,000
Preferred Stock, Dividend Rate, Percentage | 5.75% |  |  |  |
Aggregate purchase price for preferred stock |  |  |  |  | 500
PT Smelting [Member] |  |  |  |  |
Investments: [Abstract] |  |  |  |  |
Equity method investment | 71 | [5] | 89 | [5] |
PT Smelting [Member] |  |  |  |  |
Investments: [Abstract] |  |  |  |  |
Company's direct ownership percentage | 25.00% |  |  |  |
Unrecognized profit on sales from PT Freeport Indonesia to PT Smelting | 58 |  | 39 |  |
Indonesia [Member] |  |  |  |  |
Schedule Of Other Assets [Line Items] |  |  |  |  |
Disputed tax assessments | 255 |  | 148 |  |
Bank Time Deposits [Member] |  |  |  |  |
Schedule Of Other Assets [Line Items] |  |  |  |  |
Legally restricted funds | $ 210 |  |  |  |
[1] | Included $210 million (time deposit that secures a bank guarantee) associated with the Cerro Verde royalty dispute and $158 million for AROs related to properties in New Mexico at December 31, 2013, and $161 million for AROs related to properties in New Mexico at December 31, 2012 (refer to Note 12 for further discussion).
[2] | Intangible assets were net of accumulated amortization totaling $57 million at December 31, 2013, and $71 million at December 31, 2012.
[3] | Included Indonesian disputed tax assessments of $255 million at December 31, 2013, and $148 million at December 31, 2012 (refer to Note 12 for further discussion).
[4] | In December 2010, FCX purchased 500,000 shares of MMR’s 5.75% Convertible Perpetual Preferred Stock for an aggregate purchase price of $500 million, which was recorded at cost and subsequently reduced by dividends. On June 3, 2013, FCX acquired MMR (refer to Note 2 for discussion of the acquisition of MMR).
[5] | FCX's 25 percent ownership in PT Smelting (smelter and refinery in Gresik, Indonesia) is recorded using the equity method. Amounts were reduced by unrecognized profits on sales from PT-FI to PT Smelting totaling $58 million at December 31, 2013, and $39 million at December 31, 2012.

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