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Income Taxes | 3 Months Ended
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Mar. 31, 2014
Effective Income Tax Rate Reconciliation, Amount [Abstract] |
Income Taxes | INCOME TAXES Income tax expense for the three months ended March 31, 2014 was $50 million, compared to income tax benefit of $(67) million in the same period of 2013. The following table summarizes the differ ence between income tax expense (benefit) at the United States statutory rate of 35% and the income tax expense at effective worldwide tax rates for the respective periods:
|  | Three Months Ended March 31,
Millions of dollars |  | 2014 |  | 2013
Earnings before income taxes |  | $ | 214 |  |  | $ | 190 |
Income tax expense computed at United States statutory tax rate |  | $ | 75 |  |  | $ | 67 |
U.S. government tax incentives, including Energy Tax Credits |  | — |  |  | (94 | )
U.S. foreign income items, net of credits |  | (12 | ) |  | (22 | )
Foreign government tax incentive, including BEFIEX |  | (5 | ) |  | (11 | )
Other |  | (8 | ) |  | (7 | )
Income tax (benefit) expense computed at effective worldwide tax rates |  | $ | 50 |  |  | $ | (67 | )
At the end of each interim period, we make our best estimate of the effective tax rate expected to be applicable for the full fiscal year and the impact of discrete items, if any, and adjust the quarterly rate as necessary.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 4: 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=6907707&loc=d3e32639-109319 Reference 5: 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=6907707&loc=d3e32537-109319 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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