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Income Taxes (Unaudited) | 3 Months Ended
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Mar. 31, 2018
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 38 percent for first-quarter 2018 and 40 percent for first-quarter 2017. Geographic sources of FCX’s (provision for) benefit from income taxes follow (in millions):
| Three Months Ended |
| March 31, |
| 2018 |  | 2017 |
U.S. operations | $ | 3 |  |  | $ | (7 | ) |
International operations | (509 | ) |  | (167 | ) |
Total | $ | (506 | ) |  | $ | (174 | ) |
The Tax Cuts and Jobs Act (the Act) was enacted on December 22, 2017, and includes significant modifications to existing U.S. tax laws and creates many new complex tax provisions. As of December 31, 2017, FCX recorded provisional impacts of the tax effects related to specific provisions and continues to evaluate other provisions of the Act. During the three months ended March 31, 2018, no adjustments were made to the provisional amounts recorded at December 31, 2017, as FCX has not fully completed its analysis of the Act. During the remainder of 2018, FCX will continue to refine its calculations as it gains a more thorough understanding of the Act.

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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 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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