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Earnings Per Share
9 Months Ended
Sep. 30, 2022
Earnings Per Share [Abstract]  
Earnings Per Share Earnings per Share
We compute basic earnings per share by dividing net income available to our common shareholders by the weighted-average number of shares of our common stock outstanding. We weight shares issued or reacquired for the portion of the period that they were outstanding. Our diluted earnings per share reflect the impacts of our potentially dilutive securities, which include our equity compensation awards.

The following table shows the computation of our basic and diluted earnings per common share (in millions, except per share amounts):
Three Months Ended
September 30
Nine Months Ended
September 30
2022202120222021
Numerator:
Net income
$29.1 $40.1 $107.5 $82.1 
Denominator:
Weighted-average shares outstanding - basic
35.2 35.5 35.4 35.4 
Effect of dilutive securities:
Equity compensation plans0.5 0.5 0.5 0.6 
Weighted-average shares outstanding - diluted
35.7 36.0 35.9 36.0 
Basic earnings per share
$0.82 $1.13 $3.04 $2.32 
Diluted earnings per share
$0.81 $1.11 $2.99 $2.28