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Earnings Per Share
 3 Months Ended
Apr. 01, 2018
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share
The reconciliation of basic and diluted earnings per share on common stock for the first quarter 2018 and 2017 follows (in millions of dollars except per share data):
 
First Quarter
 
2018
 
2017
Net earnings
$
29.1

 
$
12.2

Less: earnings allocated to participating securities
(0.4
)
 
(0.2
)
Net earnings available to common shareholders
$
28.7

 
$
12.0

 
 
 
 
Average shares outstanding (millions):
 
 
 
Basic
38.6

 
38.3

Dilutive share awards
0.3

 
0.4

Diluted
38.9

 
38.7

 
 
 
 
Basic earnings per share
$
0.74

 
$
0.31

Diluted earnings per share
$
0.74

 
$
0.31


Potentially dilutive shares outstanding are primarily related to performance shares for the first quarter 2018 and 2017.