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INCOME TAXES (Narrative) (Details) - USD ($) $ in Millions |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 01, 2017 | Dec. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Schedule Of Income Taxes [Line Items] |  |  |  |  |  |
Total income taxes paid to all jurisdictions |  |  | $ 702 | $ 203 | $ 893 |
Tax refunds received from all jurisdictions |  |  | 329 | 247 | 334 |
Tax Attributes |  |  |  |  |  |
Foreign tax credits |  | $ 2,129 | 2,129 | 2,094 |  |
Valuation allowances |  | 4,575 | 4,575 | 6,058 |  |
Net provision associated with an increase in the beginning of the year valuation allowance |  |  | 1,500 | (1,200) |  |
Decrease associated with reduction in corporate income Tax Reform |  |  | 1,100 |  |  |
Reversal of valuation allowance for minimum tax credit carryforwords due to Tax Reform |  |  | 371 |  |  |
Provisional net tax benefits associated with Tax Reform |  |  | 393 | 0 | 0 |
Reversal of valuation allowances due to 2017 Tax Cuts and Jobs Act |  | (975) | 272 |  |  |
Decrease in corporate income tax due to Tax Cuts and Jobs Act |  | 121 | 121 |  |  |
AMT credits |  | 490 | 490 | 444 |  |
Provision for (benefit from) income taxes |  |  | 883 | 371 | (1,951) |
Tax charge to establish a reserve for uncertain tax positions |  | 108 | 108 |  |  |
Income (loss) from continuing operation, foreign |  |  | 2,882 | 1,707 | 461 |
Income (loss) from continuing operations, domestic |  |  | $ 20 | $ (5,179) | $ (14,589) |
U.S. federal statutory tax rate |  |  | 35.00% | 35.00% | 35.00% |
Interest on income taxes accrued |  | 22 | $ 22 | $ 19 | $ 16 |
Unrecognized tax benefits |  | 390 | 390 | 101 | 110 | $ 104
Unrecognized tax benefits that would impact the effective tax rate |  | 344 | 344 |  |  |
Unrecognized tax benefits that would impact the effective tax rate, net of tax benefits |  | 272 | 272 |  |  |
Valuation allowance for operating loss carryforwards |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
Valuation allowances |  | 2,100 | 2,100 |  |  |
Foreign Tax Credits |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
Valuation allowances |  | 2,100 | 2,100 |  |  |
Impairment To Oil And Gas Properties |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
Valuation allowances |  |  |  | 1,600 | 3,300 |
Discontinued Operations |  |  |  |  |  |
Schedule Of Income Taxes [Line Items] |  |  |  |  |  |
Total income taxes paid to all jurisdictions |  |  |  | $ 27 | $ 187 |
SUNAT | Cerro Verde |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
Foreign income tax rate under new stability agreement |  |  |  | 32.00% |  |
Foreign Tax Authority |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
Foreign tax credits |  | 1,100 | 1,100 |  |  |
Operating Loss Carryforwards |  | 566 | 566 |  |  |
Income (loss) from continuing operation, foreign |  |  | $ 5,300 |  |  |
Foreign Tax Authority | Chili - Service of Internal Taxes |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
U.S. federal statutory tax rate |  |  | 35.00% | 35.00% |  | 35.00%
Foreign Tax Authority | Chili - Service of Internal Taxes | 2020 and thereafter |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
U.S. federal statutory tax rate |  |  |  | 44.50% |  |
Foreign Tax Authority | Chili - Service of Internal Taxes | Tax Year 2022 and Thereafter |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
U.S. federal statutory tax rate |  |  | 44.50% |  |  |
Foreign Tax Authority | Chili - Service of Internal Taxes | Tax Years 2013 to 2017 |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
Mining royalty tax rate |  |  | 4.00% |  |  |
Foreign Tax Authority | Chili - Service of Internal Taxes | Tax Years 2018 to 2023 | Minimum |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
Mining royalty tax rate |  |  | 5.00% |  |  |
Foreign Tax Authority | Chili - Service of Internal Taxes | Tax Years 2018 to 2023 | Maximum |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
Mining royalty tax rate |  |  | 14.00% |  |  |
Foreign Tax Authority | SUNAT | 2014 |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
U.S. federal statutory tax rate |  |  |  | 30.00% |  |
Dividend tax rate |  |  |  | 4.10% |  |
Foreign Tax Authority | SUNAT | 2019 and thereafter |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
U.S. federal statutory tax rate |  |  |  | 26.00% |  |
Dividend tax rate |  |  |  | 9.30% |  |
Foreign Tax Authority | SUNAT | Tax Year 2017 |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
Dividend tax rate | 5.00% |  |  |  |  |
Corporate Income Tax Rate | 29.50% |  |  |  |  |
Domestic Tax Authority |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
Operating Loss Carryforwards |  | 6,400 | $ 6,400 |  |  |
Capital Loss Carryforwards |  | 160 | 160 |  |  |
Valuation allowances |  | 280 | 280 |  |  |
Income (loss) from continuing operations, domestic |  |  | 5,300 |  |  |
State and Local Jurisdiction |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
Operating Loss Carryforwards |  | $ 10,600 | 10,600 |  |  |
Alternative Minimum Tax Credit |  |  |  |  |  |
Tax Attributes |  |  |  |  |  |
Provisional net tax benefits associated with Tax Reform |  |  | 380 |  |  |
AMT credit carryforwards |  |  |  | $ (72) |  |
Provision for (benefit from) income taxes |  |  | $ (38) |  |  |

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