STOCKHOLDERS' EQUITY - Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2008
SCC share repurchase program:
Amount authorized for share repurchase program	$ 3,000	$ 500
Total Number of Shares Purchased	119.5
Cost of purchase of shares	$ 2,900
Closing price of NYSE (in dollars per share)	$ 61.71
Maximum Number of Shares that May Yet Be Purchased Under the Plan @ $39.68	1.3
Percentage of Ownership by Parent	88.90%

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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