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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Abstract]
Federal corporate tax rate	21.00%	21.00%	35.00%
Net deferred tax asset			$ 1,531

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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Amount of income tax expense for remeasurement of deferred tax asset from change in tax rate pursuant to Tax Cuts and Jobs Act.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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