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STOCKHOLDERS' EQUITY: (Details 2) (USD $)
In Millions, except Share data, unless otherwise specified
 1 Months Ended 3 Months Ended 12 Months Ended 74 Months Ended
Sep. 30, 2014
Aug. 31, 2014
Jul. 31, 2014
Jun. 30, 2014
Mar. 21, 2014
Jan. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Sep. 30, 2014
Oct. 17, 2013
Jul. 28, 2011
SCC share repurchase program:                                    
Amount authorized for share repurchase program                             $ 500   $ 2,000 $ 1,000
Total Number of Shares Purchased 4,498,263 4,926,534 724,516 450,532 106,079 1,768,000 10,149,313 450,532 1,874,079 10,245,000 4,442,336 9,034,400 15,600 4,912,000 28,510,150 69,633,410    
Average Price Paid per Share (in dollars per share) $ 31.44 $ 32.09 $ 33.04 $ 28.92 $ 27.04 $ 28.06 $ 31.87 $ 28.92 $ 28.00 $ 27.47 $ 33.17 $ 30.29 $ 29.69 $ 14.64 $ 13.49 $ 22.24    
Total Number of Shares Purchased as Part of Publicly Announced Plan 69,633,410 65,135,147 60,208,613 59,484,097 59,033,565 58,927,486 69,633,410 59,484,097   57,159,486 46,914,486 42,472,150 33,437,750 33,422,150 28,510,150 69,633,410    
Maximum Number of Shares that May Yet Be Purchased Under the Plan @ $30.37 15,229,726           15,229,726                 15,229,726    
Share purchase price under the plan (in dollars per share) $ 29.65           $ 29.65                 $ 29.65    
Total Cost $ 141.4 $ 158.1 $ 23.9 $ 13.0 $ 2.9 $ 49.6 $ 323.4 $ 13.0 $ 52.5 $ 281.4 $ 147.3 $ 273.7 $ 0.5 $ 71.9 $ 384.7 $ 1,548.4    
Percentage of ownership interest held by the parent company 83.50%           83.50%                 83.50%