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OTHER ASSETS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Schedule Of Other Assets [Line Items] |  |  |
Intangible assetsb | $ 305 | $ 316 |
Investments: [Abstract] |  |  |
Assurance bond | 120 | 118 |
Available-for-sale securities | 50 | 47 |
Other | 50 | 50 |
Disposal group, contingent consideration | 196 | 0 |
Legally restricted fundsf | 182 | 171 |
Long-term receivable for taxes | 129 | 261 |
Rio Tinto's share of ARO | 71 | 49 |
Long-lead equipment | 17 | 187 |
Deferred drillship costs | 0 | 81 |
Other | 145 | 141 |
Total other assets | 1,956 | 1,987 |
Finite-Lived Intangible Assets, Accumulated Amortization | 37 | 61 |
Equity in affiliated companies’ net earnings (losses) | 11 | (3) | $ 3
PT Freeport Indonesia [Member] |  |  |
Investments: [Abstract] |  |  |
Long-term receivable for taxes | 331 | 209 |
Cerro Verde |  |  |
Investments: [Abstract] |  |  |
Long-term receivable for taxes | 277 | 245 |
PT Smelting |  |  |
Investments: [Abstract] |  |  |
PT Smelting | $ 83 | 112 |
Ownership percentage | 25.00% |  |
Equity in affiliated companies’ net earnings (losses) | $ 39 | 14 |
Accounts Receivable, Gross, Current | 283 | 160 |
NEW MEXICO |  |  |
Investments: [Abstract] |  |  |
Legally restricted funds for asset retirement obligations at New Mexico mines | $ 173 | $ 169 |

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