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PROVISIONALLY PRICED SALES: (Details)	Mar. 31, 2012 priceperunit lbs
Copper
Provisionally priced sales
Nonmonetary notional amount of commodity (in million lbs.)	15,600,000
Provisional price	3.84
Copper | April 2012
Provisionally priced sales
Nonmonetary notional amount of commodity (in million lbs.)	14,100,000
Provisional price	3.84
Copper | May 2012
Provisionally priced sales
Nonmonetary notional amount of commodity (in million lbs.)	1,500,000
Provisional price	3.83
Molybdenum
Provisionally priced sales
Nonmonetary notional amount of commodity (in million lbs.)	9,000,000
Provisional price	14.00
Molybdenum | April 2012
Provisionally priced sales
Nonmonetary notional amount of commodity (in million lbs.)	3,300,000
Provisional price	14.00
Molybdenum | May 2012
Provisionally priced sales
Nonmonetary notional amount of commodity (in million lbs.)	3,300,000
Provisional price	14.00
Molybdenum | June 2012
Provisionally priced sales
Nonmonetary notional amount of commodity (in million lbs.)	2,400,000
Provisional price	14.00

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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X

- Details

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