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STOCKHOLDERS' EQUITY: (Details 2) (USD $) In Millions, except Share data, unless otherwise specified | 0 Months Ended | 1 Months Ended | 5 Months Ended | 6 Months Ended | 8 Months Ended | 9 Months Ended | 12 Months Ended | 53 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
May 31, 2012 | Apr. 23, 2012 | Oct. 31, 2012 | Sep. 30, 2012 | Aug. 31, 2012 | Jun. 30, 2012 | Jul. 31, 2011 | Dec. 31, 2008 | Oct. 14, 2010 | Dec. 31, 2011 | Sep. 30, 2009 | Dec. 31, 2012 | Dec. 31, 2008 | Dec. 31, 2012
SCC share repurchase program: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount authorized for share repurchase program |  |  |  |  |  |  | $ 1,000 |  |  |  |  |  | $ 500 |
Total Number of Shares Purchased | 500,000 | 278,486 | 430,000 | 2,763,850 | 100,000 | 370,000 |  | 28,510,150 | 15,600 | 9,034,400 | 4,912,000 | 4,442,336 |  | 46,914,486
Average Price Paid per Share | $ 28.57 | $ 30.23 | $ 34.83 | $ 34.71 | $ 32.47 | $ 28.33 |  | $ 13.49 | $ 29.69 | $ 30.29 | $ 14.64 | $ 33.17 |  | $ 18.72
Cumulative Number of Shares Purchased | 43,250,636 | 42,750,636 | 46,914,486 | 46,484,486 | 43,720,636 | 43,620,636 |  | 28,510,150 | 33,437,750 | 42,472,150 | 33,422,150 |  | 28,510,150 |
Maximum Number of Shares that may yet be Purchased Under the Plan @ $37.86 |  |  |  |  |  |  |  |  |  |  |  | 3,220,925 |  | 3,220,925
Share purchase price under the plan (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  | $ 37.86 |  | $ 37.86
Total Cost | $ 14.3 | $ 8.4 | $ 15.0 | $ 95.9 | $ 3.2 | $ 10.5 |  | $ 384.7 | $ 0.5 | $ 273.7 | $ 71.9 | $ 147.3 |  | $ 878.1
Percentage of ownership interest held by the parent company |  |  |  |  |  |  |  |  |  | 80.90% |  | 81.30% |  | 81.30%

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