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INCOME TAXES - COMPONENTS OF TAX EXPENSE (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Current tax expense (benefit): |  |  |
Federal | $ 26 | $ (5) | $ 127
State | 13 | 9 | 35
Total current | 39 | 4 | 162
Deferred tax expense: |  |  |
Federal | 175 | 125 | (3)
State | 33 | 19 | 40
Total deferred | 208 | 144 | 37
Income tax expense | $ 247 | $ 148 | $ 199

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