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COMMITMENTS AND CONTINGENCIES: (Details 3) | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 1 Months Ended
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Mar. 31, 2015 Mexico USD ($) | Mar. 31, 2015 Tia Maria Peru USD ($) T | Mar. 31, 2015 Toquepala Concentrator Expansion Peru USD ($) | Jun. 30, 2013 Toquepala Concentrator Expansion Peru USD ($) | Jun. 30, 2013 Toquepala Concentrator Expansion Peru PEN | Dec. 31, 2014 Toquepala Concentrator Expansion Peru USD ($) | Dec. 31, 2014 Toquepala Concentrator Expansion Peru PEN | Mar. 31, 2015 MGE | Dec. 31, 2005 MGE item | Mar. 31, 2015 MGE Mexico item MW | Mar. 31, 2015 Copper Toquepala Concentrator Expansion Peru T | Mar. 31, 2015 Molybdenum Toquepala Concentrator Expansion Peru T | Dec. 31, 1997 Enersur Power purchase agreements | Jun. 30, 2014 Electroperu S.A Power purchase agreements | Jul. 31, 2014 Kallpa Power purchase agreements
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 |  | 354,000,000 scco_AmountSpendInCurrentYear / scco_SiteAxis = scco_TiaMariaMember / us-gaap_StatementGeographicalAxis = country_PE | 348,600,000 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 |  |  |  |  |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  |  | 33,000,000 scco_AmountCommittedForFundingSocialAndInfrastructureImprovementProjects / scco_SiteAxis = scco_ToquepalaConcentratorExpansionMember / us-gaap_StatementGeographicalAxis = country_PE | 100,000,000 scco_AmountCommittedForFundingSocialAndInfrastructureImprovementProjects / 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 | 20 years | 10 years
Amount paid-out for development projects in the Candarave province |  |  |  | 143,000,000 scco_AmountPaidOutForFundingUnderFinalAgreementForCandaraveProvince / scco_SiteAxis = scco_ToquepalaConcentratorExpansionMember / us-gaap_StatementGeographicalAxis = country_PE | 445,000,000 scco_AmountPaidOutForFundingUnderFinalAgreementForCandaraveProvince / scco_SiteAxis = scco_ToquepalaConcentratorExpansionMember / us-gaap_StatementGeographicalAxis = country_PE |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |
Commitment for capital projects | $ 464,000,000 scco_CommitmentsForCapitalProjects / us-gaap_StatementGeographicalAxis = country_MX |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net total capacity (in megawatts) |  |  |  |  |  |  |  |  |  | 516.2 scco_PowerGeneratingUnitsTotalCapacity / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = scco_MexicoGeneradoraDeEnergiaSDeRLMember / us-gaap_StatementGeographicalAxis = country_MX |  |  |  |  |

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 paid out in the period for development projects in the Candarave province. + References No definition available. + Details
Name: | scco_AmountPaidOutForFundingUnderFinalAgreementForCandaraveProvince
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 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

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- 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