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DOMESTIC AND FOREIGN INCOME TAXES (Tables) | 12 Months Ended
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Dec. 31, 2017
DOMESTIC AND FOREIGN INCOME TAXES |
Schedule of domestic and foreign components of income (loss) from continuing operations before domestic and foreign income taxes |
For the years ended December 31, (in millions) |  | Domestic |  | Foreign |  | Total |
2017 |  | $ | (609) |  | $ | 1,937 |  | $ | 1,328 |
2016 |  | $ | (2,698) |  | $ | 1,034 |  | $ | (1,664) |
2015 |  | $ | (5,810) |  | $ | (3,666) |  | $ | (9,476) |
Schedule of provisions (credits) for domestic and foreign income taxes on continuing operations |
For the years ended December 31, (in millions) |  | United States Federal |  | State and Local |  | Foreign |  | Total |
2017 |  |  |  |  |  |  |  |  |
Current |  | $ | (81) |  | $ | 11 |  | $ | 806 |  | $ | 736 |
Deferred |  | (856) |  | 23 |  | 114 |  | (719) |
|  | $ | (937) |  | $ | 34 |  | $ | 920 |  | $ | 17 |
2016 |  |  |  |  |  |  |  |  |
Current |  | $ | (784) |  | $ | 9 |  | $ | 630 |  | $ | (145) |
Deferred |  | (504) |  | (19) |  | 6 |  | (517) |
|  | $ | (1,288) |  | $ | (10) |  | $ | 636 |  | $ | (662) |
2015 |  |  |  |  |  |  |  |  |
Current |  | $ | (810) |  | $ | (31) |  | $ | 883 |  | $ | 42 |
Deferred |  | (1,146) |  | (83) |  | (143) |  | (1,372) |
|  | $ | (1,956) |  | $ | (114) |  | $ | 740 |  | $ | (1,330) |
Schedule of reconciliation of the United States federal statutory income tax rate to Occidental's worldwide effective tax rate on income from continuing operations stated as a percentage of pre-tax income |
For the years ended December 31, |  | 2017 |  | 2016 |  | 2015 |
United States federal statutory tax rate |  | 35% |  | 35% |  | 35% |
Other than temporary loss on available for sale investment in California Resources stock |  | — |  | (2) |  | (1) |
Enhanced oil recovery credit |  | (9) |  | 5 |  | — |
Tax benefit due to write off of exploration blocks |  | — |  | 14 |  | — |
Change in federal income tax rate |  | (44) |  | — |  | — |
Tax expense due to reversal of indefinite reinvestment assertion |  | 7 |  | — |  | — |
Operations outside the United States |  | 12 |  | (14) |  | (21) |
State income taxes, net of federal benefit |  | 2 |  | — |  | 1 |
Other |  | (2) |  | 2 |  | — |
Worldwide effective tax rate |  | 1% |  | 40% |  | 14% |
Schedule of tax effects of temporary differences resulting in deferred income taxes |
|  | 2017 |  | 2016 |
Tax effects of temporary differences (in millions) |  | Deferred Tax Assets |  | Deferred Tax Liabilities |  | Deferred Tax Assets |  | Deferred Tax Liabilities |
Property, plant and equipment differences |  | $ | — |  | $ | 2,272 |  | $ | — |  | $ | 3,345 |
Equity investments, partnerships and foreign subsidiaries |  | — |  | 134 |  | — |  | 58 |
Environmental reserves |  | 191 |  | — |  | 314 |  | — |
Postretirement benefit accruals |  | 145 |  | — |  | 342 |  | — |
Deferred compensation and benefits |  | 151 |  | — |  | 222 |  | — |
Asset retirement obligations |  | 228 |  | — |  | 406 |  | — |
Foreign tax credit carryforwards |  | 2,750 |  | — |  | 2,046 |  | — |
Corporate alternative minimum tax credit carryforwards |  | — |  | — |  | 226 |  | — |
General business credit carryforwards |  | 407 |  | — |  | 186 |  | — |
Net operating loss carryforward |  | 437 |  | — |  | — |  | — |
Federal benefit of state income taxes |  | 10 |  | — |  | 8 |  | — |
All other |  | 146 |  | — |  | 370 |  | — |
Subtotal |  | 4,465 |  | 2,406 |  | 4,120 |  | 3,403 |
Valuation allowance |  | (2,640) |  | — |  | (1,849) |  | — |
Total deferred taxes |  | $ | 1,825 |  | $ | 2,406 |  | $ | 2,271 |  | $ | 3,403 |
Schedule of reconciliation of the beginning and ending amount of unrecognized tax benefits |
For the years ended December 31, (in millions) |  | 2017 |  | 2016 |  | 2015 |
Balance at January 1, |  | $ | 22 |  | $ | 22 |  | $ | 61 |
Reductions based on tax positions related to prior years and settlements |  | — |  | — |  | (39) |
Balance at December 31, |  | $ | 22 |  | $ | 22 |  | $ | 22 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319 + Details
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