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INCOME TAXES (Reconciliation of U.S. federal statutory rate to effective tax rate) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amount
U.S. federal statutory tax rate	$ 1,215	$ 4,945	$ 280
Valuation allowance, net	(1,680)	(2,955)	0
Foreign tax credit limitation	(598)	(228)	(136)
Percentage depletion	211	186	263
Withholding and other impacts on foreign earnings	(93)	(193)	(161)
Effect of foreign rates different than the U.S. federal statutory rate	45	12	69
Goodwill impairment	0	0	(601)
Goodwill transferred to full cost pool	0	0	(77)
State income taxes	46	105	116
Other items, net	(37)	79	22
(Provision for) benefit from income taxes	$ (371)	$ 1,951	$ (225)
Percent
U.S. federal statutory tax rate	(35.00%)	(35.00%)	(35.00%)
Valuation allowance, net	48.00%	21.00%	(0.00%)
Foreign tax credit limitation	17.00%	2.00%	17.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Restructuring Charges, Amount	$ (520)	$ 0	$ 0
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Restructuring Charges, Percent	15.00%	0.00%	0.00%
Percentage depletion	(6.00%)	(1.00%)	(33.00%)
Withholding and other impacts on foreign earnings	3.00%	1.00%	20.00%
Effect of foreign rates different than the U.S. federal statutory rate	(1.00%)	(0.00%)	(9.00%)
Goodwill impairment	(0.00%)	(0.00%)	75.00%
Goodwill transferred to full cost pool	(0.00%)	(0.00%)	10.00%
State income taxes	(1.00%)	(1.00%)	(14.00%)
Other items, net	1.00%	(1.00%)	(3.00%)
(Provision for) benefit from income taxes	11.00%	(14.00%)	28.00%
Valuation allowances	$ 6,058	$ 4,183
Impairment To Oil And Gas Properties
Percent
Valuation allowances	1,600	$ 3,300
Candelaria and Ojos del Salado Mining Complex
Percent
Adjustment from sale of Candelaria and Ojos del Salado mines			$ 221
Domestic Tax Authority
Percent
Valuation allowances	$ 574
Other nondeductible expense			(16)
Chili - Service of Internal Taxes | Foreign Tax Authority
Percent
U.S. federal statutory tax rate	(35.00%)
Other nondeductible expense			54
SUNAT | Foreign Tax Authority
Amount
Other items, net	$ 13
Percent
Other nondeductible expense			$ 24

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in deferred tax liabilities associated with the full cost pool.

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