INCOME TAXES - NOL (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Operating loss carryforwards
Unrecognized federal and state tax benefits and reserves for interest and penalties, which may decrease in the next 12 months	$ 10
Deferred tax benefit, net of valuation allowance and federal tax impact, associated with NOL carryforwards	266	$ 399
Federal
Operating loss carryforwards
Net operating loss carryforwards subject to expiration	1,000
State
Operating loss carryforwards
Net operating loss carryforwards subject to expiration	3,100
Deferred tax benefit, net of valuation allowance and federal tax impact, associated with NOL carryforwards	$ 22

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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