INCOME TAXES (Schedule of Domestic and Foreign Components of Income Before Income Taxes and Tax Reconciliation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosures [Abstract]
Income (Loss) Before Income Taxes, Domestic	$ 49	$ 1,254	$ 896
Income (Loss) Before Income Taxes, Foreign	8	(11)	(5)
Income (Loss) Before Income Taxes	57	1,243	891
Taxes at U.S. statutory rate	20	435	312
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount	(8)	(8)	(26)
Unrecognized tax benefits	(26)	24	0
Federal tax accrual adjustments	(7)	(7)	(14)
State and local tax impact	(14)	(11)	42
Other - net	3	2	(10)
Total tax provision (credit)	$ (32)	$ 435	$ 304
Effective tax rate	(56.10%)	35.00%	34.10%