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EQUITY - TOTAL STOCK BASED COMPENSATION EXPENSE AND THE TAX RELATED BENEFIT (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity [Abstract]
Stock option expense	$ 7	$ 7	$ 7
RSU expense	39	58	13
Total stock based compensation expense	46	65	20
Related deferred income tax benefit	$ 5	$ 8	$ 2

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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- Definition

Amount of noncash expense for award of restricted stock or unit under share-based payment arrangement.

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Amount of noncash expense for option under share-based payment arrangement.

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