INCOME TAXES - Deferred Taxes Temporary Difference (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Net operating losses:
Federal	$ 22	$ 22
State	130	92
Goodwill and intangible assets	9	10
Basis in DSH	834	0
Tax Credits	67	0
Settlement and other accruals	7	39
Other	46	28
Deferred tax assets, gross	1,115	191
Valuation allowance for deferred tax assets	(252)	(65)
Total deferred tax assets	863	126
Deferred Tax Liabilities:
Goodwill and intangible assets	(402)	(415)
Property & equipment, net	(221)	(90)
Other	(43)	(28)
Total deferred tax liabilities	(666)	(533)
Net deferred tax assets (liabilities)	$ 197
Net deferred tax assets (liabilities)		$ (407)