INCOME TAXES (Summary of Operating Loss and Tax Credit Carryforward) (Details) $ in Millions	Dec. 31, 2018 USD ($)
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward	$ 3,880
Tax credit carryforward	118
Charitable contribution loss carryforward	10
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward	58
Tax credit carryforward	79
Charitable contribution loss carryforward	$ 10

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

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