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Earnings Per Share
 3 Months Ended
Mar. 31, 2022
Earnings Per Share [Abstract]  
Earnings Per Share

16. Earnings Per Share

The computations of earnings per common share for the three months ended March 31, 2022 and 2021 were as follows:

 

(In millions, except per share data)

 

Three Months Ended
March 31,

 

 

 

2022

 

 

2021

 

Net income

 

$

180.9

 

 

$

177.8

 

 

 

 

 

 

 

 

Basic earnings per common share

 

$

1.36

 

 

$

1.28

 

Diluted earnings per common share

 

$

1.34

 

 

$

1.26

 

 

 

 

 

 

 

 

Basic average shares outstanding

 

 

133.4

 

 

 

138.6

 

Stock-based awards

 

 

1.3

 

 

 

2.0

 

Diluted average shares outstanding

 

 

134.7

 

 

 

140.6

 

Antidilutive stock-based awards excluded from weighted-
   average number of shares outstanding for diluted
   earnings per share

 

 

0.4

 

 

 

0.2