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STOCKHOLDERS' EQUITY: (Details 3) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Directors' Stock Award Plan |  |
Share based compensation plan |  |
Common shares received on election as director | 1,200 scco_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesGrantedOnElectionToDirectors / us-gaap_PlanNameAxis = scco_DirectorsStockAwardPlanMember |
Additional shares issued at each annual general meeting | 1,200 scco_ShareBasedCompensationArrangementByShareBasedPaymentAwardAdditionalAnnualSharesGrantedToDirectors / us-gaap_PlanNameAxis = scco_DirectorsStockAwardPlanMember |
Total SCC shares reserved for the plan | 600,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = scco_DirectorsStockAwardPlanMember | 600,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = scco_DirectorsStockAwardPlanMember
Activity in directors' stock award plan |  |
Granted at the beginning of the period (in shares) | (297,600)scco_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesGrants / us-gaap_PlanNameAxis = scco_DirectorsStockAwardPlanMember | (285,600)scco_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesGrants / us-gaap_PlanNameAxis = scco_DirectorsStockAwardPlanMember
Granted in the period (in shares) | (12,000)scco_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesGrantsInPeriod / us-gaap_PlanNameAxis = scco_DirectorsStockAwardPlanMember | (12,000)scco_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesGrantsInPeriod / us-gaap_PlanNameAxis = scco_DirectorsStockAwardPlanMember
Granted at the end of the period (in shares) | (309,600)scco_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesGrants / us-gaap_PlanNameAxis = scco_DirectorsStockAwardPlanMember | (297,600)scco_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesGrants / us-gaap_PlanNameAxis = scco_DirectorsStockAwardPlanMember
Remaining shares reserved | 290,400 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = scco_DirectorsStockAwardPlanMember | 302,400 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = scco_DirectorsStockAwardPlanMember
Employee Stock Purchase Plan |  |
Share based compensation |  |
Percentage of title acquired by employee in every two years on shares paid in previous two years | 50.00%scco_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfTitleAcquiredByEmployeeEveryTwoYearsOnSharesPaidInPreviousTwoYears / us-gaap_PlanNameAxis = scco_EmployeeStockPurchasePlanMember |
The period describing the expiration of the contribution period and the bonus eligibility | 8 years |
Bonus shares granted to participant (as a ratio) | 0.1 scco_ShareBasedCompensationArrangementByShareBasedPaymentAwardBonusGrantedAtEndOfExpirationTerm / us-gaap_PlanNameAxis = scco_EmployeeStockPurchasePlanMember |

X
- Definition Represents the additional number of shares issued to the director at each annual general meeting. + References No definition available. + Details
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- Definition Represents the ratio of bonus granted to the participant upon meeting the eligibility period of the share based compensation plan. + References No definition available. + Details
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- Definition The period after which the employee has purchased shares through the plan through payroll deductions and is therefore eligible for the bonus grant. + References No definition available. + Details
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- Definition Represents the percentage of title acquired by the employee in every two years on shares paid in previous two years. + References No definition available. + Details
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- Definition Represents the number of shares issued to the director at the time of election. + References No definition available. + Details
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- Definition Represents the number of shares granted under the share based compensation arrangement plan as of the balance sheet date. + References No definition available. + Details
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- Definition Represents the number of shares granted during the period under share based compensation arrangement. + References No definition available. + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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