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PROVISIONALLY PRICED SALES: (Details)	Jun. 30, 2012 priceperunit lbs
Copper
Provisionally priced sales
Nonmonetary notional amount of commodity (in million lbs.)	47,800,000
Provisional price	3.491
Copper | July 2012
Provisionally priced sales
Nonmonetary notional amount of commodity (in million lbs.)	26,200,000
Provisional price	3.491
Copper | August 2012
Provisionally priced sales
Nonmonetary notional amount of commodity (in million lbs.)	21,600,000
Provisional price	3.490
Molybdenum
Provisionally priced sales
Nonmonetary notional amount of commodity (in million lbs.)	9,000,000
Provisional price	13.13
Molybdenum | July 2012
Provisionally priced sales
Nonmonetary notional amount of commodity (in million lbs.)	3,400,000
Provisional price	13.13
Molybdenum | August 2012
Provisionally priced sales
Nonmonetary notional amount of commodity (in million lbs.)	3,400,000
Provisional price	13.13
Molybdenum | September 2012
Provisionally priced sales
Nonmonetary notional amount of commodity (in million lbs.)	2,200,000
Provisional price	13.13

X

- 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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- Details

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Data Type:	xbrli:stringItemType
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X

- 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
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