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Income Taxes (Unaudited) | 6 Months Ended
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Jun. 30, 2015
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 25 percent for the first six months of 2015 and 35 percent for the first six months of 2014. Geographic sources of FCX's (benefit from) provision for income taxes follow (in millions):
| Three Months Ended |  | Six Months Ended |
| June 30, |  | June 30, |
| 2015 |  | 2014 |  | 2015 |  | 2014 |
U.S. operations | $ | (829 | ) | a | $ | 149 |  | b | $ | (1,664 | ) | a | $ | 285 |  | b
International operations | 142 |  |  | 179 |  |  | 282 |  |  | 400 |  |
Total | $ | (687 | ) |  | $ | 328 |  |  | $ | (1,382 | ) |  | $ | 685 |  |
a. | As a result of the impairment to oil and gas properties, FCX recorded tax charges of $305 million for second-quarter 2015 and $763 million for the first six months of 2015 to establish a valuation allowance primarily against U.S. federal alternative minimum tax credits. Excluding this charge, FCX's consolidated effective income tax rate was 38 percent for the first six months of 2015.
b. | FCX recognized a $58 million charge for deferred taxes recorded in connection with the allocation of goodwill to the sale of Eagle Ford shale assets.

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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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