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COMMITMENTS AND CONTINGENCIES: - Guaymas sulfuric acid spill (Details) - Marine Terminal in Guaymas |  | 9 Months Ended
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Jul. 09, 2019 m³ | Sep. 30, 2019 item
SUBSEQUENT EVENTS: |  |
Volume of sulfuric acid discharged in the incident at Guaymas | 3 |
Water volume at Guaymas bay | 340,000,000 |
Number of times of renewal | item |  | 4
Number of years of each renewal |  | 2 years

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- Definition Number of times of renewal. + References No definition available. + Details
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Namespace Prefix: | scco_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of years of each renewal. + References No definition available. + Details
Name: | scco_NumberOfYearsOfEachRenewal
Namespace Prefix: | scco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Volume of sulfuric acid discharged in the incident. + References No definition available. + Details
Name: | scco_VolumeOfSulfuricAcidDischargedInIncident
Namespace Prefix: | scco_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

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- Definition Water volume at Guaymas bay. + References No definition available. + Details
Name: | scco_WaterVolumeAtGuaymasBay
Namespace Prefix: | scco_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | scco_SiteAxis=scco_MarineTerminalInGuaymasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |