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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2020
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,
 20202019
Numerator:(in millions, except share and per share amounts)
Net income attributable to common shareholders$203  $247  
Denominator:  
Weighted-average common shares outstanding for basic earnings per share
164,864,077  165,343,968  
Weighted-average effect of dilutive securities:  
Employee equity awards(1)
1,912,439  1,682,787  
Weighted-average common shares outstanding for diluted earnings per share
166,776,516  167,026,755  
Basic and diluted earnings per share:
  
Basic earnings per share$1.23  $1.49  
Diluted earnings per share$1.22  $1.48  
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(1) PSUs, which are considered contingently issuable, are included in the computation of dilutive earnings per share on a weighted average basis when management determines that the applicable performance criteria would have been met if the performance period ended as of the date of the relevant computation.