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Income Taxes (Unaudited) | 3 Months Ended
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Mar. 31, 2016
Income Tax Disclosure [Abstract] |
Income Taxes | INCOME TAXES Variations in the relative proportions of jurisdictional income result in fluctuations to FCX's consolidated effective income tax rate. FCX’s consolidated effective income tax rate was (2) percent for first-quarter 2016 and 23 percent for first-quarter 2015. Geographic sources of FCX's (provision for) benefit from income taxes follow (in millions):
| Three Months Ended |
| March 31, |
| 2016 |  | 2015 |
U.S. operations | $ | 11 |  |  | $ | 835 |  |
International operations | (88 | ) |  | (121 | ) |
Total | $ | (77 | ) |  | $ | 714 |  |
As a result of the impairment to U.S. oil and gas properties, FCX recorded tax charges of $1.4 billion in first-quarter 2016 and $458 million in first-quarter 2015 to establish a valuation allowance primarily against U.S. federal and state deferred tax assets that will not generate a future benefit. Excluding these charges, FCX's consolidated effective income tax rate was 34 percent in first-quarter 2016 and 37 percent in first-quarter 2015. Applicable accounting standards provide that FCX estimate an annual effective tax rate and apply that rate to each year-to-date interim period. However, because FCX’s estimated effective income tax rate for 2016 is highly variable (i.e., minor changes in FCX’s estimated annual (loss) income would have a significant effect on the consolidated annual effective income tax rate), the actual effective income tax rate for the year-to-date reporting period represents a better estimate of the consolidated annual effective income tax rate. Accordingly, for the three months ended March 31, 2016, the actual consolidated effective tax income rate was used to determine FCX’s income tax provision.

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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 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 2: 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 Reference 3: 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 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 + Details
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