INCOME TAXES - Income and Provision for Income Tax (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income (loss) before income taxes
Income (loss) before income taxes	$ 201	$ (5,476)	$ (2,421)
Provision (benefit) for federal, state and local income taxes
Current United States Federal tax expense (benefit)		255	66
Current State and Local tax expense (benefit)		81	99
Current Total tax expense (benefit)		336	165
Deferred United States Federal tax expense (benefit)	(66)	(1,961)	(840)
Deferred State and Local tax expense (benefit)	(12)	(297)	(312)
Deferred Total tax expense (benefit)	(78)	(2,258)	(1,152)
United States Federal Total tax expense (benefit)	(66)	(1,706)	(774)
State and Local Total tax expense (benefit)	(12)	(216)	(213)
Total tax expense (benefit)	$ (78)	$ (1,922)	$ (987)