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SEGMENT AND RELATED INFORMATION: - Provisional Sale (Details) lb in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) lb $ / lb	Dec. 31, 2015 USD ($)
Provisionally priced sales
Provisional price sales adjustment amounts included in net sales	$ (5.8)	$ 6.1
Copper
Provisionally priced sales
Provisional price sales adjustment amounts included in accounts receivable	$ (6.2)	6.0
Copper | January through February 2017
Provisionally priced sales
Sales volume (in million lbs.) | lb	81.4
Provisional price | $ / lb	2.50
Molybdenum
Provisionally priced sales
Provisional price sales adjustment amounts included in accounts receivable	$ 0.4	$ 0.1
Molybdenum | January through March 2017
Provisionally priced sales
Sales volume (in million lbs.) | lb	8.1
Provisional price | $ / lb	6.69

X

- Definition

Aggregate notional amount of provisionally priced sales agreements with notional amounts expressed in nonmonetary units.

+ References

No definition available.

+ Details

Name:	scco_NonmonetaryNotionalAmountOfProvisionallyPricedSalesAgreements
Namespace Prefix:	scco_
Data Type:	num:massItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The per unit price of provisionally priced sales agreements.

+ References

No definition available.

+ Details

Name:	scco_ProvisionalPriceOfSalesAgreementsPerUnit
Namespace Prefix:	scco_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the provisional sales price adjustment amounts included in net sales.

+ References

No definition available.

+ Details

Name:	scco_ProvisionalPriceSalesAdjustmentInNetSales
Namespace Prefix:	scco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the provisional sales price adjustment amounts included in accounts receivable.

+ References

No definition available.

+ Details

Name:	scco_ProvisionalPriceSalesAdjustmentsInAccountsReceivable
Namespace Prefix:	scco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	scco_ProvisionallyPricedSalesLineItems
Namespace Prefix:	scco_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ProductOrServiceAxis=scco_CopperMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	scco_SettlementMonthAxis=scco_SettlementInJanuaryThroughFebruary2017Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=scco_MolybdenumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	scco_SettlementMonthAxis=scco_SettlementInJanuaryThroughMarch2017Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: