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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (Details)	6 Months Ended
	Jun. 30, 2018
Minimum
Revenue Recognition
Percentage of metal production sold under annual or longer-term contracts	80.00%
Maximum
Revenue Recognition
Percentage of metal production sold under annual or longer-term contracts	90.00%

X

- Definition

The percentage of metal production sold under annual or longer-term contracts.

+ References

No definition available.

+ Details

Name:	scco_PercentageOfMetalProductionSoldUnderAnnualOrLongerTermContracts
Namespace Prefix:	scco_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- 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

Name:	us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: