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INCOME TAXES (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Current income tax expense: |  |  |
U.S. Federal | $ 166 | $ 248 | $ 311
U.S. State | 32 | 29 | 38
Foreign | 47 | 22 | 25
Total current | 245 | 299 | 374
Deferred income tax expense | 13 | 14 | 12
Income tax expense | 258 | 313 | 386
Net operating loss carryforwards related primarily from foreign operations | 269 |  |
Undistributed earnings of foreign subsidiaries | 545 |  |
Accrued interest and penalties related to tax uncertainties | 4 | 5 | 4
Liability for tax uncertainties | 13 | 21 |
Interest expense | $ 1 | $ 1 | $ 1

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