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SEGMENT AND RELATED INFORMATION: (Details 5) | 12 Months Ended
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Dec. 31, 2014 T
Copper cathodes | Mitsui |
Long-term sales contract |
Quantity to be supplied (in tons) | 48,000 scco_LongTermSupplyCommitmentsQuantity / dei_LegalEntityAxis = scco_MitsuiCoLtdMember / us-gaap_ProductOrServiceAxis = scco_CopperCathodesMember
Quantity to be supplied related to prior contract (period 1994-2000) (in tons) | 90,000 scco_LongTermSupplyCommitmentsPriorContractsQuantity / dei_LegalEntityAxis = scco_MitsuiCoLtdMember / us-gaap_ProductOrServiceAxis = scco_CopperCathodesMember
Quantity to be supplied related to prior contract in 2014 (in tons) | 48,000 scco_LongTermSupplyCommitmentsPriorContractsQuantityToBeSuppliedIn2014 / dei_LegalEntityAxis = scco_MitsuiCoLtdMember / us-gaap_ProductOrServiceAxis = scco_CopperCathodesMember
Quantity to be supplied related to prior contract in 2015 (in tons) | 42,000 scco_LongTermSupplyCommitmentsPriorContractsQuantityToBeSuppliedIn2015 / dei_LegalEntityAxis = scco_MitsuiCoLtdMember / us-gaap_ProductOrServiceAxis = scco_CopperCathodesMember
Quantity to be supplied related to additional annual contract in 2015 (in tons) | 6,000 scco_LongTermSupplyCommitmentsAdditionalAnnualContractQuantityToBeSuppliedIn2015 / dei_LegalEntityAxis = scco_MitsuiCoLtdMember / us-gaap_ProductOrServiceAxis = scco_CopperCathodesMember
Quantity to be supplied related to additional annual contract from 2016 until 2019 (in tons) | 48,000 scco_LongTermSupplyCommitmentsAdditionalAnnualContractQuantityToBeSuppliedFrom2016To2019 / dei_LegalEntityAxis = scco_MitsuiCoLtdMember / us-gaap_ProductOrServiceAxis = scco_CopperCathodesMember
Additional term in which contract may be renewed | 5 years
Copper cathodes | Mitsui | Tia Maria |
Long-term sales contract |
Quantity to be supplied following the full startup of project (in tons) | 24,000 scco_LongTermSupplyCommitmentsAdditionalAnnualContractQuantityToBeSuppliedFollowingFullStartupOfProject / dei_LegalEntityAxis = scco_MitsuiCoLtdMember / us-gaap_ProductOrServiceAxis = scco_CopperCathodesMember / scco_SiteAxis = scco_TiaMariaMember
Molybdenum concentrates | Molibdenos y Metales |
Long-term sales contract |
Quantity to be supplied (in tons) | 30,800 scco_LongTermSupplyCommitmentsQuantity / dei_LegalEntityAxis = scco_MolibdenosYMetalesSAMember / us-gaap_ProductOrServiceAxis = scco_MolybdenumConcentratesMember
Period for which contract can be extended | 1 year
Minimum period for which contract is to be maintained | 3 years
Molybdenum concentrates | Molymex |
Long-term sales contract |
Minimum percentage of total production required to be supplied | 85.00%scco_LongTermSupplyCommitmentsMinimumPercentageOfProductionCommitted / dei_LegalEntityAxis = scco_MolymexSADeCVMember / us-gaap_ProductOrServiceAxis = scco_MolybdenumConcentratesMember

X
- Definition Represents the quantity of product agreed to be supplied under the additional annual contract following the full startup of the project. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsAdditionalAnnualContractQuantityToBeSuppliedFollowingFullStartupOfProject
Namespace Prefix: | scco_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the quantity of product agreed to be supplied under the additional annual contract from 2016 until 2019. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsAdditionalAnnualContractQuantityToBeSuppliedFrom2016To2019
Namespace Prefix: | scco_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the quantity of product agreed to be supplied under the additional annual contract in 2015. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsAdditionalAnnualContractQuantityToBeSuppliedIn2015
Namespace Prefix: | scco_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the additional term for renewal of contract. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsAdditionalContractRenewalTerm
Namespace Prefix: | scco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period for which long-term sales contract can be extended every year in December. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsContractExtensionPeriod
Namespace Prefix: | scco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum period for which the contract is to be maintained unless either party to contract decides to terminate the agreement. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsMinimumContractPeriodToBeMaintained
Namespace Prefix: | scco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum percentage of the entity's total production of goods that must be supplied within the specified time period of the agreement. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsMinimumPercentageOfProductionCommitted
Namespace Prefix: | scco_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the quantity of product agreed to be supplied under the prior long-term sales contract for the period 1994 to 2000. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsPriorContractsQuantity
Namespace Prefix: | scco_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the quantity of product agreed to be supplied under the prior long-term sales contract in 2014. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsPriorContractsQuantityToBeSuppliedIn2014
Namespace Prefix: | scco_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the quantity of product agreed to be supplied under the prior long-term sales contract in 2015. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsPriorContractsQuantityToBeSuppliedIn2015
Namespace Prefix: | scco_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the quantity of product agreed to be supplied over a specified time period under the long-term sales contract. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsQuantity
Namespace Prefix: | scco_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_ProductOrServiceAxis=scco_CopperCathodesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=scco_MolybdenumConcentratesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |