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COMMITMENTS AND CONTINGENCIES: (Details 3) | 12 Months Ended | 1 Months Ended
--- | --- | ---
Dec. 31, 2014 USD ($) | Dec. 31, 2014 Tia Maria Peru USD ($) T | Dec. 31, 2014 Tia Maria Peru PEN | Dec. 31, 2014 Toquepala Concentrator Expansion Peru USD ($) | Dec. 31, 2014 Toquepala Concentrator Expansion Peru PEN | Dec. 31, 2014 MGE | Dec. 31, 2005 MGE item | Dec. 31, 2014 MGE Mexico MW item | Dec. 31, 2014 Copper Toquepala Concentrator Expansion Peru T | Dec. 31, 2014 Molybdenum Toquepala Concentrator Expansion Peru T | Jun. 30, 2014 Power purchase agreements Electroperu S.A Peru MW | Jul. 31, 2014 Power purchase agreements Kallpa Peru MW
Other commitments: |  |  |  |  |  |  |  |  |  |  |  |
Project Budget |  | $ 1,400,000,000 scco_ProjectBudgetAmount / scco_SiteAxis = scco_TiaMariaMember / us-gaap_StatementGeographicalAxis = country_PE |  | $ 1,200,000,000 scco_ProjectBudgetAmount / scco_SiteAxis = scco_ToquepalaConcentratorExpansionMember / us-gaap_StatementGeographicalAxis = country_PE |  |  |  |  |  |  |  |
Amount expended in current year |  | 353,600,000 scco_AmountSpendInCurrentYear / scco_SiteAxis = scco_TiaMariaMember / us-gaap_StatementGeographicalAxis = country_PE |  | 346,000,000 scco_AmountSpendInCurrentYear / scco_SiteAxis = scco_ToquepalaConcentratorExpansionMember / us-gaap_StatementGeographicalAxis = country_PE |  |  |  |  |  |  |  |
Annual production ( in tons) |  | 120,000 scco_AnnualProduction / scco_SiteAxis = scco_TiaMariaMember / us-gaap_StatementGeographicalAxis = country_PE | 120,000 scco_AnnualProduction / scco_SiteAxis = scco_TiaMariaMember / us-gaap_StatementGeographicalAxis = country_PE |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  | 100,000 scco_AmountCommittedForFundingSocialAndInfrastructureImprovementProjects / scco_SiteAxis = scco_TiaMariaMember / us-gaap_StatementGeographicalAxis = country_PE | 148,900,000 scco_AmountCommittedForFundingSocialAndInfrastructureImprovementProjects / scco_SiteAxis = scco_ToquepalaConcentratorExpansionMember / us-gaap_StatementGeographicalAxis = country_PE | 445,000,000 scco_AmountCommittedForFundingSocialAndInfrastructureImprovementProjects / scco_SiteAxis = scco_ToquepalaConcentratorExpansionMember / us-gaap_StatementGeographicalAxis = country_PE |  |  |  |  |  |  |
Amount expended for funding social and infrastructure improvement projects |  | 33,000,000 scco_AmountExpendedForFundingSocialAndInfrastructureImprovementProjectsInCurrentYear / scco_SiteAxis = scco_TiaMariaMember / us-gaap_StatementGeographicalAxis = country_PE | 700,000 scco_AmountExpendedForFundingSocialAndInfrastructureImprovementProjectsInCurrentYear / scco_SiteAxis = scco_TiaMariaMember / us-gaap_StatementGeographicalAxis = country_PE | 15,100,000 scco_AmountExpendedForFundingSocialAndInfrastructureImprovementProjectsInCurrentYear / scco_SiteAxis = scco_ToquepalaConcentratorExpansionMember / us-gaap_StatementGeographicalAxis = country_PE | 45,000,000 scco_AmountExpendedForFundingSocialAndInfrastructureImprovementProjectsInCurrentYear / scco_SiteAxis = scco_ToquepalaConcentratorExpansionMember / us-gaap_StatementGeographicalAxis = country_PE |  |  |  |  |  |  |
Estimated increase in annual production (in tons) |  |  |  |  |  |  |  |  | 100,000 scco_EstimatedIncreaseInAnnualProduction / us-gaap_ProductOrServiceAxis = scco_CopperMember / scco_SiteAxis = scco_ToquepalaConcentratorExpansionMember / us-gaap_StatementGeographicalAxis = country_PE | 3,100 scco_EstimatedIncreaseInAnnualProduction / us-gaap_ProductOrServiceAxis = scco_MolybdenumMember / scco_SiteAxis = scco_ToquepalaConcentratorExpansionMember / us-gaap_StatementGeographicalAxis = country_PE |  |
Term of power purchase agreement related to sale of power plant |  |  |  |  |  |  |  |  |  |  | 20 years | 10 years
Number of megawatt supply energy for which the entity signed the agreement |  |  |  |  |  |  |  |  |  |  | 120 scco_NumberOfMegawattSupplyEnergyForWhichEntitySignedAgreement / us-gaap_CounterpartyNameAxis = scco_ElectroperuSaMember / us-gaap_StatementGeographicalAxis = country_PE / us-gaap_TypeOfArrangementAxis = scco_PowerPurchaseAgreementMember | 120 scco_NumberOfMegawattSupplyEnergyForWhichEntitySignedAgreement / us-gaap_CounterpartyNameAxis = scco_KallpaGeneracionSaMember / us-gaap_StatementGeographicalAxis = country_PE / us-gaap_TypeOfArrangementAxis = scco_PowerPurchaseAgreementMember
Number of power plants |  |  |  |  |  |  | 2 scco_RelatedPartyTransactionsNumberOfPowerPlants / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = scco_MexicoGeneradoraDeEnergiaSDeRLMember | 2 scco_RelatedPartyTransactionsNumberOfPowerPlants / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = scco_MexicoGeneradoraDeEnergiaSDeRLMember / us-gaap_StatementGeographicalAxis = country_MX |  |  |  |
Percentage of supply to third-party energy users |  |  |  |  |  | 12.00%scco_RelatedPartyTransactionsPercentageOfPowerSupplyToThirdPartyEnergyUsers / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = scco_MexicoGeneradoraDeEnergiaSDeRLMember |  |  |  |  |  |
Net total capacity (in megawatts) |  |  |  |  |  |  |  | 516.2 scco_PowerGeneratingUnitsTotalCapacity / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = scco_MexicoGeneradoraDeEnergiaSDeRLMember / us-gaap_StatementGeographicalAxis = country_MX |  |  |  |
Commitments for Capital Projects | $ 401,500,000 scco_CommitmentsForCapitalProjects |  |  |  |  |  |  |  |  |  |  |

X
- Definition Represents the amount committed to funding for social and infrastructure improvement projects + References No definition available. + Details
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Namespace Prefix: | scco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represents the amount expended for funding social and infrastructure improvement projects in current year. + References No definition available. + Details
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Namespace Prefix: | scco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represents the amount spend in the current year. + References No definition available. + Details
Name: | scco_AmountSpendInCurrentYear
Namespace Prefix: | scco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represents the annual production in volume during the period. + References No definition available. + Details
Name: | scco_AnnualProduction
Namespace Prefix: | scco_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | scco_CommitmentsAbstract
Namespace Prefix: | scco_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Captial expansion programs at the Mexican operations that are scheduled to be expended in the next twelve months. + References No definition available. + Details
Name: | scco_CommitmentsForCapitalProjects
Namespace Prefix: | scco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Represents the estimated increase in annual production. + References No definition available. + Details
Name: | scco_EstimatedIncreaseInAnnualProduction
Namespace Prefix: | scco_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

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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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Namespace Prefix: | scco_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the net total capacity of the natural gas-fired combined cycle power generating units. + References No definition available. + Details
Name: | scco_PowerGeneratingUnitsTotalCapacity
Namespace Prefix: | scco_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the original term (in years) of the power purchase agreement completed in connection with the sale of a power plant to an independent power company. + References No definition available. + Details
Name: | scco_PowerPurchaseAgreementTerm
Namespace Prefix: | scco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the budget amount of the project. + References No definition available. + Details
Name: | scco_ProjectBudgetAmount
Namespace Prefix: | scco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represents the number of power plants constructed by the related party. + References No definition available. + Details
Name: | scco_RelatedPartyTransactionsNumberOfPowerPlants
Namespace Prefix: | scco_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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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
Name: | scco_RelatedPartyTransactionsPercentageOfPowerSupplyToThirdPartyEnergyUsers
Namespace Prefix: | scco_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration