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STOCKHOLDERS' EQUITY - Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019	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)	$ 42.48
Maximum Number of Shares that May Yet Be Purchased Under the Plan @ $39.68	1.9
Percentage of Ownership by Parent	88.90%

X

- Definition

Represents the percentage of stock owned by parent.

+ References

No definition available.

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- References

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- Definition

Represents the repurchase price per share at which the maximum remaining number of shares authorized under the board authorized repurchase program may be purchased.

+ References

No definition available.

+ Details

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X

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

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X

- Definition

The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
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- Definition

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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