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STOCKHOLDERS' EQUITY: (Details 2) (USD $)
 0 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended 48 Months Ended 84 Months Ended
Jan. 29, 2015
Dec. 31, 2014
Nov. 30, 2014
Oct. 31, 2014
Sep. 30, 2014
Aug. 31, 2014
Jul. 31, 2014
Jun. 30, 2014
Mar. 21, 2014
Jan. 31, 2014
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2014
Jan. 29, 2015
Dec. 31, 2008
SCC share repurchase program:                                        
Amount authorized for share repurchase program   $ 3,000,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1                 $ 3,000,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1             $ 3,000,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1   $ 500,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1
Total Number of Shares Purchased   3,129,524us-gaap_TreasuryStockSharesAcquired 1,286,767us-gaap_TreasuryStockSharesAcquired 5,821,213us-gaap_TreasuryStockSharesAcquired 4,498,263us-gaap_TreasuryStockSharesAcquired 4,926,534us-gaap_TreasuryStockSharesAcquired 724,516us-gaap_TreasuryStockSharesAcquired 450,532us-gaap_TreasuryStockSharesAcquired 106,079us-gaap_TreasuryStockSharesAcquired 1,768,000us-gaap_TreasuryStockSharesAcquired 10,237,504us-gaap_TreasuryStockSharesAcquired 10,149,313us-gaap_TreasuryStockSharesAcquired 450,532us-gaap_TreasuryStockSharesAcquired 1,874,079us-gaap_TreasuryStockSharesAcquired 10,245,000us-gaap_TreasuryStockSharesAcquired 4,442,336us-gaap_TreasuryStockSharesAcquired 42,472,150us-gaap_TreasuryStockSharesAcquired 79,870,914us-gaap_TreasuryStockSharesAcquired    
Average Price Paid per Share (in dollars per share)   $ 28.08us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 29.50us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 28.86us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 31.44us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 32.09us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 33.04us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 28.92us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 27.04us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 28.06us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 28.70us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 31.87us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 28.92us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 28.00us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 27.47us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 33.17us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 17.20us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 23.07us-gaap_TreasuryStockAcquiredAverageCostPerShare    
Total Number of Shares Purchased as Part of Publicly Announced Plan   79,870,914scco_TreasuryStockSharesAcquiredCumulative 76,741,390scco_TreasuryStockSharesAcquiredCumulative 75,454,623scco_TreasuryStockSharesAcquiredCumulative 69,633,410scco_TreasuryStockSharesAcquiredCumulative 65,135,147scco_TreasuryStockSharesAcquiredCumulative 60,208,613scco_TreasuryStockSharesAcquiredCumulative 59,484,097scco_TreasuryStockSharesAcquiredCumulative 59,033,565scco_TreasuryStockSharesAcquiredCumulative 58,927,486scco_TreasuryStockSharesAcquiredCumulative 79,870,914scco_TreasuryStockSharesAcquiredCumulative 69,633,410scco_TreasuryStockSharesAcquiredCumulative 59,484,097scco_TreasuryStockSharesAcquiredCumulative   57,159,486scco_TreasuryStockSharesAcquiredCumulative 46,914,486scco_TreasuryStockSharesAcquiredCumulative 42,472,150scco_TreasuryStockSharesAcquiredCumulative 79,870,914scco_TreasuryStockSharesAcquiredCumulative    
Maximum Number of Shares that May Yet Be Purchased Under the Plan @ $29.11   5,593,347us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased                 5,593,347us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased             5,593,347us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased    
Total Cost   87,900,000us-gaap_TreasuryStockValueAcquiredCostMethod 38,000,000us-gaap_TreasuryStockValueAcquiredCostMethod 168,000,000us-gaap_TreasuryStockValueAcquiredCostMethod 141,400,000us-gaap_TreasuryStockValueAcquiredCostMethod 158,100,000us-gaap_TreasuryStockValueAcquiredCostMethod 23,900,000us-gaap_TreasuryStockValueAcquiredCostMethod 13,000,000us-gaap_TreasuryStockValueAcquiredCostMethod 2,900,000us-gaap_TreasuryStockValueAcquiredCostMethod 49,600,000us-gaap_TreasuryStockValueAcquiredCostMethod 293,900,000us-gaap_TreasuryStockValueAcquiredCostMethod 323,400,000us-gaap_TreasuryStockValueAcquiredCostMethod 13,000,000us-gaap_TreasuryStockValueAcquiredCostMethod 52,500,000us-gaap_TreasuryStockValueAcquiredCostMethod 281,400,000us-gaap_TreasuryStockValueAcquiredCostMethod 147,300,000us-gaap_TreasuryStockValueAcquiredCostMethod 730,800,000us-gaap_TreasuryStockValueAcquiredCostMethod 1,842,300,000us-gaap_TreasuryStockValueAcquiredCostMethod    
Percentage of Ownership by Parent   84.60%scco_PercentageOfOwnershipByParent                 84.60%scco_PercentageOfOwnershipByParent       82.30%scco_PercentageOfOwnershipByParent     84.60%scco_PercentageOfOwnershipByParent    
Maximum number of shared                                     35,500,000scco_MaximumSharesStockRepurchaseProgramAuthorizedToBeRepurchased  
Increase in amount authorized for share repurchase program $ 1,000,000,000scco_StockRepurchaseProgramIncreaseInAuthorizedAmount