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Earnings Per Share
3 Months Ended
Mar. 31, 2020
Earnings Per Share [Abstract]  
Earnings Per Share 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.

Securities that were not included in the computation of diluted earnings per share because their effect was antidilutive were immaterial for the three months ended March 31, 2020 and 2019.