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STOCKHOLDERS' EQUITY: (Details 2) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended | 60 Months Ended | 93 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2015 | Aug. 31, 2015 | Jul. 31, 2015 | Apr. 30, 2015 | Mar. 31, 2015 | Feb. 28, 2015 | Jan. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2015 | Dec. 31, 2008
SCC share repurchase program: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount authorized for share repurchase program | $ 3,000.0 |  |  |  |  |  |  | $ 3,000.0 |  |  |  |  |  | $ 3,000.0 | $ 500.0
Total Number of Shares Purchased | 3,724,273 | 6,160,000 | 1,603,800 | 1,511,200 | 4,563,649 | 2,590,076 | 5,927,154 | 11,488,073 | 1,511,200 | 13,080,879 | 22,711,428 | 10,245,000 | 46,914,486 | 105,951,066 |
Average Price Paid per Share (in dollars per share) | $ 26.69 | $ 26.90 | $ 27.84 | $ 29.42 | $ 29.16 | $ 29.45 | $ 27.12 | $ 26.97 | $ 29.42 | $ 29.29 | $ 30.06 | $ 27.47 | $ 18.72 | $ 24.22 |
Total Number of Shares Purchased as Part of Publicly Announced Plan | 105,951,066 | 102,226,793 | 96,066,793 | 94,462,993 | 92,951,793 | 88,388,144 | 85,798,068 | 105,951,066 |  | 92,951,793 | 79,870,914 | 57,159,486 | 46,914,486 | 105,951,066 |
Maximum Number of Shares that May Yet Be Purchased Under the Plan @ $26.72 | 16,219,324 |  |  |  |  |  |  | 16,219,324 |  |  |  |  |  | 16,219,324 |
Total Cost | $ 99.4 | $ 165.7 | $ 44.6 | $ 44.5 | $ 133.1 | $ 76.3 | $ 160.7 | $ 309.7 | $ 44.5 | $ 370.1 | $ 682.8 | $ 281.4 | $ 878.1 | $ 2,566.6 |
Percentage of ownership interest held by the parent company | 87.40% |  |  |  |  |  |  | 87.40% |  |  |  |  |  | 87.40% |

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