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COMMITMENTS AND CONTINGENCIES: (Details 3) In Millions, unless otherwise specified | 9 Months Ended | 12 Months Ended | 1 Months Ended | 9 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended
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Sep. 30, 2014 USD ($) | Dec. 31, 1997 Power purchase agreements Enersur | Jun. 30, 2014 Peruvian operations Power purchase agreements Electroperu S.A MW | Jul. 31, 2014 Peruvian operations Power purchase agreements Kallpa MW | Sep. 30, 2014 Toquepala Concentrator Expansion Copper T | Sep. 30, 2014 Toquepala Concentrator Expansion Molybdenum T | Nov. 30, 2013 Toquepala Concentrator Expansion Peruvian operations USD ($) | Nov. 30, 2013 Toquepala Concentrator Expansion Peruvian operations PEN | Feb. 28, 2013 Toquepala Concentrator Expansion Peruvian operations USD ($) item | Feb. 28, 2013 Toquepala Concentrator Expansion Peruvian operations PEN | Jun. 30, 2013 Toquepala Concentrator Expansion Peruvian operations USD ($) | Jun. 30, 2013 Toquepala Concentrator Expansion Peruvian operations PEN | Sep. 30, 2014 Mexico Generadora de Energia S. de R.L. ("MGE") | Dec. 31, 2005 Mexico Generadora de Energia S. de R.L. ("MGE") item | Sep. 30, 2014 Mexico Generadora de Energia S. de R.L. ("MGE") Mexican Operations item
Other commitments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of provinces for which final agreement reached |  |  |  |  |  |  |  |  | 1 | 1 |  |  |  |  |
Amount committed to funding for development projects in the Candarave province |  |  |  |  |  |  |  |  | $ 100 | 255 |  |  |  |  |
Amount paid-out for development projects in the Candarave province |  |  |  |  |  |  |  |  |  |  | 17 | 45 |  |  |
Amount committed to funding for development projects in the Jorge Basadre province |  |  |  |  |  |  | 36 | 100 |  |  |  |  |  |  |
Estimated increase in annual production (in tons) |  |  |  |  | 100,000 | 3,100 |  |  |  |  |  |  |  |  |
Term of power purchase agreement related to sale of power plant |  | 20 years | 20 years | 10 years |  |  |  |  |  |  |  |  |  |  |
Number of megawatt supply energy for which the entity signed the agreement |  |  | 120 | 120 |  |  |  |  |  |  |  |  |  |  |
Number of power plants |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 | 2
Percentage of supply to third-party energy users |  |  |  |  |  |  |  |  |  |  |  |  | 12.00% |  |
Commitment for capital projects | $ 600 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Represents the amount committed to funding for development projects in the Candarave province. + References No definition available. + Details
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- Definition Represents the amount committed to funding for development projects in the Jorge Basadre province. + References No definition available. + Details
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- Definition Represents the amount paid out in the period for development projects in the Candarave province. + References No definition available. + Details
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- Details
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- Definition Capital expansion programs at the Mexican operations that are scheduled to be expended in the next twelve months. + References No definition available. + Details
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- Definition Represents the estimated increase in annual production. + References No definition available. + Details
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- Definition Represents the supply energy for which the entity signed the agreement, expressed in megawatts. + References No definition available. + Details
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- Definition Represent the percentage of power supply to third-party energy users out of power output from plant by the related party. + References No definition available. + Details
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