INCOME TAXES (Components of deferred tax assets and liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Foreign tax credits	$ 2,094	$ 1,552
Accrued expenses	923	1,167
Oil and gas properties	346	1,422
Minimum tax credits	444	569
Net operating loss carryforwards	2,898	621
Employee benefit plans	403	442
Other	485	478
Deferred tax assets	7,593	6,251
Valuation allowances	(6,058)	(4,183)
Net deferred tax assets	1,535	2,068
Deferred tax liabilities:
Property, plant, equipment and mine development costs	4,326	4,765
Undistributed earnings	(779)	(852)
Other	(195)	(55)
Total deferred tax liabilities	(5,300)	(5,672)
Net deferred tax liabilities	$ (3,765)	$ (3,604)