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Net Income Per Share
6 Months Ended
Jun. 30, 2017
Earnings Per Share [Abstract]  
Net Income Per Share
Net Income (Loss) Per Share
The following table reconciles the Company's net income (loss) attributable to common stockholders to basic and diluted net income (loss) attributable to common stockholders for the three and six months ended June 30, 2017 and 2016:
 
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
 
2017
 
2016
 
2017
 
2016
 
 
(in millions)
Net income (loss) attributable to common stockholders
 
$
233

 
$
(268
)
 
$
191

 
$
(535
)
Participating share-based earnings
 
(2
)
 

 
(2
)
 

Basic and diluted net income (loss) attributable to common stockholders
 
$
231

 
$
(268
)
 
$
189

 
$
(535
)

Basic and diluted weighted average common shares outstanding were 170 million for the three and six months ended June 30, 2017, respectively, as compared to 164 million and 163 million for the same respective periods in 2016.