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DOMESTIC AND FOREIGN INCOME TAXES (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
Schedule of domestic and foreign components of income (loss) from continuing operations before domestic and foreign income taxes | The domestic and foreign components of income (loss) from continuing operations before domestic and foreign income taxes were as follows:
For the years ended December 31, (in millions) |  | Domestic |  | Foreign |  | Total
2018 |  | $ | 3,431 |  |  | $ | 2,177 |  |  | $ | 5,608 |
2017 |  | $ | (609 | ) |  | $ | 1,937 |  |  | $ | 1,328 |
2016 |  | $ | (2,698 | ) |  | $ | 1,034 |  |  | $ | (1,664 | )
Schedule of provisions (credits) for domestic and foreign income taxes on continuing operations | The provisions (credits) for domestic and foreign income taxes on continuing operations consisted of the following:
For the years ended December 31, (in millions) |  | United States Federal |  | State and Local |  | Foreign |  | Total
2018 |  |  |  |  |  |  |  |
Current |  | $ | (23 | ) |  | $ | 52 |  |  | $ | 1,077 |  |  | $ | 1,106 |
Deferred |  | 422 |  |  | 12 |  |  | (63 | ) |  | 371 |
|  | $ | 399 |  |  | $ | 64 |  |  | $ | 1,014 |  |  | $ | 1,477 |
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 | )
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 | The following reconciliation of the United States federal statutory income tax rate to Occidental’s worldwide effective tax rate on income from continuing operations is stated as a percentage of pre-tax income:
For the years ended December 31, |  | 2018 |  | 2017 |  | 2016
United States federal statutory tax rate |  | 21 | % |  | 35 | % |  | 35 | %
Other than temporary loss on available for sale investment in California Resources stock |  | — |  |  | — |  |  | (2 | )
Enhanced oil recovery credit |  | (3 | ) |  | (9 | ) |  | 5 |
Tax benefit due to write off of exploration blocks |  | — |  |  | — |  |  | 14 |
Change in federal income tax rate |  | — |  |  | (44 | ) |  | — |
Tax (benefit) expense due to reversal of indefinite reinvestment assertion |  | (2 | ) |  | 7 |  |  | — |
Operations outside the United States |  | 11 |  |  | 12 |  |  | (14 | )
State income taxes, net of federal benefit |  | 1 |  |  | 2 |  |  | — |
Other |  | (2 | ) |  | (2 | ) |  | 2 |
Worldwide effective tax rate |  | 26 | % |  | 1 | % |  | 40 | %
Schedule of tax effects of temporary differences resulting in deferred income taxes | The tax effects of temporary differences resulting in deferred income taxes at December 31, 2018, and 2017 were as follows:
|  | 2018 |  | 2017
Tax effects of temporary differences (in millions) |  | Deferred Tax Assets |  | Deferred Tax Liabilities |  | Deferred Tax Assets |  | Deferred Tax Liabilities
Property, plant and equipment differences |  | $ | — |  |  | $ | 2,089 |  |  | $ | — |  |  | $ | 2,272 |
Equity investments, partnerships and foreign subsidiaries |  | — |  |  | 161 |  |  | — |  |  | 134 |
Environmental reserves |  | 195 |  |  | — |  |  | 191 |  |  | — |
Postretirement benefit accruals |  | 176 |  |  | — |  |  | 145 |  |  | — |
Deferred compensation and benefits |  | 170 |  |  | — |  |  | 151 |  |  | — |
Asset retirement obligations |  | 280 |  |  | — |  |  | 228 |  |  | — |
Foreign tax credit carryforwards |  | 2,356 |  |  | — |  |  | 2,750 |  |  | — |
General business credit carryforwards |  | 429 |  |  | — |  |  | 407 |  |  | — |
Net operating loss carryforward |  | 29 |  |  | — |  |  | 437 |  |  | — |
Federal benefit of state income taxes |  | 18 |  |  | — |  |  | 10 |  |  | — |
All other |  | 93 |  |  | — |  |  | 146 |  |  | — |
Subtotal |  | 3,746 |  |  | 2,250 |  |  | 4,465 |  |  | 2,406 |
Valuation allowance |  | (2,403 | ) |  | — |  |  | (2,640 | ) |  | — |
Total deferred taxes |  | $ | 1,343 |  |  | $ | 2,250 |  |  | $ | 1,825 |  |  | $ | 2,406 |
Schedule of reconciliation of the beginning and ending amount of unrecognized tax benefits | A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
For the years ended December 31, (in millions) |  | 2018 |  | 2017 |  | 2016
Balance at January 1, |  | $ | 22 |  |  | $ | 22 |  |  | $ | 22 |
Reductions based on tax positions related to prior years and settlements |  | (22 | ) |  | — |  |  | — |
Balance at December 31, |  | $ | — |  |  | $ | 22 |  |  | $ | 22 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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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