Earnings Per Common Share
 12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Earnings Per Common Share
Note 17: Earnings per Common Share
Presented in the table below is a reconciliation of the numerator and denominator for the basic and diluted earnings per share (“EPS”) calculations for the years ended December 31:
 
2019
 
2018
 
2017
Numerator:
 
 
 
 
 
Net income attributable to common shareholders
$
621

 
$
567

 
$
426

 
 
 
 
 
 
Denominator:
 

 
 

 
 

Weighted average common shares outstanding—Basic
181

 
180

 
178

Effect of dilutive common stock equivalents
—

 
—

 
1

Weighted average common shares outstanding—Diluted
181

 
180

 
179


The effect of dilutive common stock equivalents is related to outstanding stock options, RSUs and PSUs granted under the Company’s 2007 Plan and 2017 Omnibus Plan, as well as estimated shares to be purchased under the Company’s 2017 Nonqualified Employee Stock Purchase Plan. Less than one million share-based awards were excluded from the computation of diluted EPS for the years ended December 31, 2019, 2018 and 2017, because their effect would have been anti-dilutive under the treasury stock method.