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COMMITMENTS AND CONTINGENCIES: - Litigation matters (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
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Sep. 30, 2016 lawsuit | Jun. 30, 2019 lawsuit | Jun. 30, 2015 lawsuit item | Dec. 31, 2015 lawsuit item | Dec. 31, 2017 lawsuit | Dec. 31, 2016 item
Litigation Matter |  |  |  |  |  |
Number of collective action lawsuits |  |  | 6 |  |  |
Number of collective action lawsuits dismissed |  |  | 2 |  |  |
Remaining number of lawsuits |  |  | 4 |  |  |
Number of civil actions seeking damages |  |  |  |  | 33 |
Number Of Constitutional Action Lawsuits |  |  |  | 4 |  |
Number of subsidiaries to which environmental impact authorizations were granted | item |  |  |  | 1 |  |
Number of subsidiaries against which lawsuits were filed | item |  |  | 2 |  |  |
Tia Maria |  |  |  |  |  |
Litigation Matter |  |  |  |  |  |
Number of lawsuits |  | 4 |  |  |  |
Buenavista del Cobre, S.A. de C.V |  |  |  |  |  |
Litigation Matter |  |  |  |  |  |
Number of civil actions seeking damages | item |  |  |  | 8 |  | 3
Francisca Garcia Enriquez |  |  |  |  |  |
Litigation Matter |  |  |  |  |  |
Number of additional constitutional lawsuits filed |  |  |  | 2 |  |
Mario Alberto Salcido et al; Maria Elena Heredia Bustamante et al; Martin Eligio Ortiz Gamez et al and Maria de los Angeles Enriquez Bacame et al |  |  |  |  |  |
Litigation Matter |  |  |  |  |  |
Number of additional constitutional lawsuits filed | 4 |  |  |  |  |
Norberto Bustamante et al |  |  |  |  |  |
Litigation Matter |  |  |  |  |  |
Number of additional constitutional lawsuits filed |  | 2 |  |  |  |

X
- Definition Represents the number of additional constitutional action lawsuits claiming damages filed during the period. + 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 Represents the number of civil actions seeking damages for injuries. + References No definition available. + Details
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Namespace Prefix: | scco_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Represents the number of collective action lawsuits sought for damages. + References No definition available. + Details
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Namespace Prefix: | scco_
Data Type: | xbrli:integerItemType
Balance Type: | na
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- Definition Represents the number of collective action lawsuits dismissed. + 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 Represents the number of Constitutional action lawsuits against various authorities and a subsidiary of The Company + 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 Represents number of lawsuits filed. + References No definition available. + Details
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Namespace Prefix: | scco_
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Balance Type: | na
Period Type: | duration

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- Definition Represents the number of subsidiaries of the company against which lawsuits were filed + References No definition available. + Details
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Namespace Prefix: | scco_
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Balance Type: | na
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- Definition Number of subsidiaries to which environmental impact authorizations were granted. + References No definition available. + Details
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Namespace Prefix: | scco_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Represents the remaining number of lawsuits. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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