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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2017
Earnings Per Share [Abstract]  
Summary of Computation of Basic and Diluted Earnings Per Share
The following table sets forth the computation of basic and diluted earnings per share:
 
Three Months Ended March 31,
 
2017
 
2016
 
(in millions, except share and per share amounts)
Numerator:
 
 
 
Net income attributable to common shareholders
$
169

 
$
132

Denominator:
 
 
 
Weighted-average common shares outstanding for basic earnings per share
166,473,073

 
164,281,692

Weighted-average effect of dilutive securities:
 
 
 
Employee equity awards
3,773,874

 
4,086,752

Weighted-average common shares outstanding for diluted earnings per share
170,246,947

 
168,368,444

Basic and diluted earnings per share:
 
 
 
Basic earnings per share
$
1.02

 
$
0.80

Diluted earnings per share
$
0.99

 
$
0.78