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Earnings Per Share ("EPS") (Tables)
3 Months Ended
Mar. 31, 2021
Earnings Per Share [Abstract]  
Calculation of basic and diluted earnings per share
The calculation of basic and diluted earnings per share for the three months ended March 31, 2021 and 2020 is set forth in the following table (in millions, except per share amounts):
Three Months Ended March 31,
20212020
Net (loss) income$(7.6)$3.7 
Weighted Average Shares Outstanding:
Basic weighted average shares outstanding48.0 47.8 
Dilutive effect of stock options and restricted share unit awards 0.2 
Diluted weighted average shares outstanding48.0 48.0 
(Loss) Earnings Per Share:
Basic$(0.16)$0.08 
Diluted$(0.16)$0.08