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Earnings (Loss) per Common Share (Tables)
6 Months Ended
Dec. 31, 2020
Earnings Per Share [Abstract]  
Schedule of calculations of basic and diluted earnings per common share
The calculations of basic and diluted (loss) earnings per common share for the three and six months ended December 31, 2020 and 2019 were as follows: 
Three Months Ended
December 31,
Six Months Ended
December 31,
(in millions, except per share data)2020201920202019
Net (loss) income$(84.9)$38.8 $(132.0)$80.0 
Less: (loss) earnings and dividends allocated to participating securities(0.2)(0.4)(0.2)(0.8)
(Loss) earnings available for common stockholders used in calculation of basic (loss) earnings per common share$(85.1)$38.4 $(132.2)$79.2 
Weighted average number of common shares outstanding, basic48.3 48.1 48.3 48.0 
Basic (loss) earnings per common share$(1.76)$0.80 $(2.74)$1.65 
Net (loss) income$(84.9)$38.8 $(132.0)$80.0 
Less: (loss) earnings and dividends allocated to participating securities(0.2)(0.4)(0.2)(0.8)
(Loss) earnings available for common stockholders used in calculation of diluted (loss) earnings per common share$(85.1)$38.4 $(132.2)$79.2 
Weighted average number of common shares outstanding, basic48.3 48.1 48.3 48.0 
Effect of shares issuable under share-based compensation plans— 0.4 — 0.4 
Weighted average number of common shares outstanding, diluted48.3 48.5 48.3 48.4 
Diluted (loss) earnings per common share$(1.76)$0.79 $(2.74)$1.64 
Schedule of awards issued under share-based compensation plans excluded from the calculations of diluted earnings per share
The following awards issued under share-based compensation plans were excluded from the above calculations of diluted earnings per share because their effects were anti-dilutive:
 
Three Months Ended
December 31,
Six Months Ended
December 31,
(in millions)2020201920202019
Stock options2.2 0.6 2.1 0.8