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Income Taxes (Unaudited) (Tables)
6 Months Ended
Jun. 30, 2013
Income Tax Disclosure [Abstract]  
Geographic Sources of Provision for Income Taxes
Geographic sources of FCX's provision (benefit) for income taxes follow (in millions):
 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2013
 
2012
 
2013
 
2012
United States operations
$
(94
)
a 
$
110

 
$
(23
)
a 
$
193

International operations
134

 
312

 
491

 
720

Total
$
40

 
$
422

 
$
468

 
$
913


a.
As a result of second-quarter 2013 oil and gas acquisitions, FCX recognized a net tax benefit of $183 million consisting of income tax benefits of $190 million associated with net reductions in FCX's valuation allowances and $69 million related to the release of the deferred tax liability on PXP's investment in MMR common stock; partially offset by income tax expense of $76 million associated with the write off of deferred tax assets related to environmental liabilities.