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INCOME TAXES (Components of deferred tax assets and liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred tax assets: |  |
Foreign tax credits | $ 1,814 | $ 2,129
Accrued expenses | 881 | 789
Oil and gas properties | 0 | 236
Net operating losses | 2,235 | 2,043
Employee benefit plans | 245 | 248
Other | 212 | 260
Deferred tax assets | 5,387 | 5,705
Valuation allowances | (4,507) | (4,575)
Net deferred tax assets | 880 | 1,130
Deferred tax liabilities: |  |
Property, plant, equipment and mine development costs | (4,200) | (3,754)
Undistributed earnings | (578) | (811)
Other | (130) | (223)
Total deferred tax liabilities | (4,908) | (4,788)
Net deferred tax liabilities | $ (4,028) | $ (3,658)

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