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Earnings per Share (Unaudited) Earnings per Share (Tables)
 3 Months Ended
Mar. 31, 2019
Earnings Per Share [Abstract]  
Reconciliation of net income (loss) and weighted-average shares of common stock outstanding Reconciliations of net income and weighted-average shares of common stock outstanding for purposes of calculating basic and diluted net income per share follow (in millions, except per share amounts):
 
Three Months Ended
 
 
March 31,
 
 
2019
 
2018
 
Net income from continuing operations
$
75

 
$
828

 
Net income from continuing operations attributable to noncontrolling interests
(45
)
 
(125
)
 
Undistributed earnings allocated to participating securities
(3
)
 
(4
)
 
Net income from continuing operations attributable to common stockholders
27

 
699

 
 
 
 
 
 
Net income (loss) from discontinued operations attributable to common stockholders
1

 
(11
)
 
 
 
 
 
 
 
 
 
 
 
Net income attributable to common stockholders
$
28

 
$
688

 
 
 
 
 
 
Basic weighted-average shares of common stock outstanding
1,451

 
1,449

 
Add shares issuable upon exercise or vesting of dilutive stock options and
restricted stock unitsa
6

 
9

 
Diluted weighted-average shares of common stock outstanding
1,457

 
1,458

 
 
 
 
 
 
Basic and diluted net income (loss) per share attributable to common stockholders:
 
 
 
 
Continuing operations
$
0.02

 
$
0.48

 
Discontinued operations
—

 
(0.01
)
 
 
$
0.02

 
$
0.47

 

a.
Excludes approximately 3 million shares of common stock in first-quarter 2019 and 4 million in first-quarter 2018 associated with outstanding stock options with exercise prices less than the average market price of FCX’s common stock that were anti-dilutive.