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SEGMENTS AND RELATED INFORMATION: (Details 5) | 12 Months Ended
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Dec. 31, 2011 t
Copper cathodes | Mitsui |
Long-term sales contract |
Quantity to be supplied (in tons) | 48,000
Quantity to be supplied related to prior contract (period 1994-2000) (in tons) | 90,000
Quantity to be supplied related to prior contract in 2014 (in tons) | 48,000
Quantity to be supplied related to prior contract in 2015 (in tons) | 42,000
Molybdenum concentrates | Molibdenos y Metales |
Long-term sales contract |
Quantity to be supplied (in tons) | 23,300
Period for which contract can be extended (in years) | 1
Minimum period for which contract is to be maintained (in years) | 3
Molybdenum concentrates | Molymex |
Long-term sales contract |
Minimum percentage of total production required to be supplied | 85.00%

X
- Definition Represents the period for which long-term sales contract can be extended every year in December. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsContractExtensionPeriod
Namespace Prefix: | scco_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum period for which the contract is to be maintained unless either party to contract decides to terminate the agreement. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsMinimumContractPeriodToBeMaintained
Namespace Prefix: | scco_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum percentage of the entity's total production of goods that must be supplied within the specified time period of the agreement. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsMinimumPercentageOfProductionCommitted
Namespace Prefix: | scco_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the quantity of product agreed to be supplied under the prior long-term sales contract for the period 1994 to 2000. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsPriorContractQuantity
Namespace Prefix: | scco_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the quantity of product agreed to be supplied under the prior long-term sales contract in 2014. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsPriorContractQuantityToBeSuppliedIn2014
Namespace Prefix: | scco_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the quantity of product agreed to be supplied under the prior long-term sales contract in 2015. + References No definition available. + Details
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Namespace Prefix: | scco_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the quantity of product agreed to be supplied over a specified time period under the long-term sales contract. + References No definition available. + Details
Name: | scco_LongTermSupplyCommitmentsQuantity
Namespace Prefix: | scco_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | scco_ScheduleOfLongTermSupplyCommitmentsLineItems
Namespace Prefix: | scco_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration