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STOCKHOLDERS' EQUITY: - Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 6 Months Ended |
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Jun. 30, 2021 | Dec. 31, 2008
SCC share repurchase program: |  |
Amount authorized for share repurchase program | $ 3,000 | $ 500
Number of Shares Purchased | 119.5 |
Maximum Number of Shares that May Yet Be Purchased Under the Plan @ $39.68 | 1.3 |
Cost of purchase of shares | $ 2,900 |
Closing price of NYSE (in dollars per share) | $ 64.32 |
Percentage of ownership by parent | 88.90% |

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