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Income Taxes (Unaudited) (Tables)
 9 Months Ended
Sep. 30, 2018
Income Tax Disclosure [Abstract]  
Income before income taxes and equity in an affiliated companies' net earnings
Geographic sources of FCX’s (provision for) benefit from income taxes follow (in millions):
 
Three Months Ended
 
Nine Months Ended
 
 
September 30,
 
September 30,
 
 
2018
 
2017
 
2018
 
2017
 
U.S. operations
$
(6
)
 
$
2

a 
$
2

b 
$
24

a 
International operations
(516
)
 
(389
)
c 
(1,545
)
 
(771
)
c 
Total
$
(522
)
 
$
(387
)
 
$
(1,543
)
 
$
(747
)