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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 net earnings per share (dollars and shares in millions, except per share amounts):
Three Months Ended
 March 31,
20202019
Earnings
Net income$4.3  $1.3  
Shares
Weighted-average common shares outstanding
(basic shares)
45.3  45.9  
Adjustment for assumed dilution:
Restricted stock units—  0.1  
Performance shares0.1  —  
Weighted-average shares assuming dilution
(diluted shares)
45.4  46.0  
Earnings per share
Basic and diluted(1)
$0.09  $0.03  
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(1) Basic and diluted earnings per share are calculated based on unrounded actual amounts.
The number of common shares that were not included in the computation of diluted earnings per share because the effect would have been anti-dilutive were 469,302 and 368,082 for the three months ended March 31, 2020 and March 31, 2019, respectively.