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v2.4.1.9

WORKERS' PARTICIPATION: (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Statutory workers' participation |  |  |
Current | $ 221.2 scco_StatutoryWorkersParticipationWorkersParticipationExpensesCurrent | $ 201.6 scco_StatutoryWorkersParticipationWorkersParticipationExpensesCurrent | $ 263.1 scco_StatutoryWorkersParticipationWorkersParticipationExpensesCurrent
Deferred | (11.4)scco_StatutoryWorkersParticipationWorkersParticipationExpensesDeferred | 31.4 scco_StatutoryWorkersParticipationWorkersParticipationExpensesDeferred | 14.3 scco_StatutoryWorkersParticipationWorkersParticipationExpensesDeferred
Workers' participation expense (in USD) | 209.8 scco_StatutoryWorkersParticipationWorkersParticipationExpenses | 233.0 scco_StatutoryWorkersParticipationWorkersParticipationExpenses | 277.4 scco_StatutoryWorkersParticipationWorkersParticipationExpenses
Peru |  |  |
Statutory workers' participation |  |  |
Provision for workers' participation as a percentage of pre-tax earnings | 8.00%scco_StatutoryWorkersParticipationProvisionForWorkersParticipationAsPercentageOfEarningsBeforeTax / us-gaap_StatementGeographicalAxis = country_PE |  |
Number of months for which an individual worker's salary is capped for consideration of annual individual worker participation | 18 months |  |
Maximum taxable units contributed by employer to benefit fund (in Peruvian taxable units) | 2,200 scco_StatutoryWorkersParticipationMaximumTaxableUnitsContributedByEmployerToBenefitFund / us-gaap_StatementGeographicalAxis = country_PE |  |
Maximum employer contribution to benefit fund (in USD) | 2.8 scco_StatutoryWorkersParticipationMaximumContributedByEmployerToBenefitFund / us-gaap_StatementGeographicalAxis = country_PE |  |
Mexico |  |  |
Statutory workers' participation |  |  |
Provision for workers' participation as a percentage of pre-tax earnings | 10.00%scco_StatutoryWorkersParticipationProvisionForWorkersParticipationAsPercentageOfEarningsBeforeTax / us-gaap_StatementGeographicalAxis = country_MX |  |
Deferred workers participation provision | $ 16.3 scco_StatutoryWorkersParticipationProvisionForWorkersParticipation / us-gaap_StatementGeographicalAxis = country_MX |  |

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- Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the maximum employer contribution to benefit fund. + References No definition available. + Details
Name: | scco_StatutoryWorkersParticipationMaximumContributedByEmployerToBenefitFund
Namespace Prefix: | scco_
Data Type: | xbrli:monetaryItemType
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- Definition Represents the maximum taxable units contributed by employer to benefit fund. + References No definition available. + Details
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Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the number of periods for which an individual worker's salary is capped for determining the maximum annual amount payable as worker's participation to each individual worker. + References No definition available. + Details
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Namespace Prefix: | scco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the provision for workers' participation. + References No definition available. + Details
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Namespace Prefix: | scco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Represents the provision for workers' participation as a percentage of pre-tax earnings. + References No definition available. + Details
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Namespace Prefix: | scco_
Data Type: | num:percentItemType
Balance Type: | na
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- Definition Represents the workers' participation expenses incurred by the entity during the period. + 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 current workers' participation expenses incurred by the entity during the period. + 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 deferred workers' participation expenses incurred by the entity during the period. + References No definition available. + Details
Name: | scco_StatutoryWorkersParticipationWorkersParticipationExpensesDeferred
Namespace Prefix: | scco_
Data Type: | xbrli:monetaryItemType
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_PE
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |