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STOCKHOLDERS' EQUITY: - Repurchase (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 114 Months Ended |
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Jun. 30, 2017 | Dec. 31, 2008
SCC share repurchase program: |  |
Amount authorized for share repurchase program | $ 3,000.0 | $ 500.0
Number of Shares Purchased | 119.5 |
Cost of purchase of shares | $ 2.9 |
Closing price of NYSE (in dollars per share) | $ 34.63 |
Maximum number of shares that could purchased under the price @ $34.63 | 2.4 |
Percentage of ownership interest held by the parent company | 88.90% |

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