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SEGMENT AND RELATED INFORMATION: (Details 4) lb in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2015 USD ($) lb $ / lb | Dec. 31, 2014 USD ($)
Provisionally priced sales |  |
Provisional price sales adjustment amounts included in net sales | $ 6.1 | $ 26.1
Copper |  |
Provisionally priced sales |  |
Provisional price sales adjustment amounts included in accounts receivable | $ 6.0 | 9.6
Copper | January through March 2016 |  |
Provisionally priced sales |  |
Sales volume (in million lbs.) | lb | 164.3 |
Provisional price | $ / lb | 2.136 |
Molybdenum |  |
Provisionally priced sales |  |
Provisional price sales adjustment amounts included in accounts receivable | $ 0.1 | $ 16.5
Molybdenum | January through April 2016 |  |
Provisionally priced sales |  |
Sales volume (in million lbs.) | lb | 12.1 |
Provisional price | $ / lb | 5.15 |

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- Definition Aggregate notional amount of provisionally priced sales agreements with notional amounts expressed in nonmonetary units. + References No definition available. + Details
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Namespace Prefix: | scco_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

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- Definition The per unit price of provisionally priced sales agreements. + References No definition available. + Details
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Namespace Prefix: | scco_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant

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- Definition Represents the provisional sales price adjustment amounts included in net sales. + References No definition available. + Details
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Namespace Prefix: | scco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Represents the provisional sales price adjustment amounts included in accounts receivable. + References No definition available. + Details
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Namespace Prefix: | scco_
Data Type: | xbrli:monetaryItemType
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Period Type: | instant

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- References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |