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Earnings (Loss) Per Common Share - Narrative (Details) - $ / shares
shares in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Dilutive effect of participating warrants (in shares) 1.6 1.6 0.0 1.6
Options exercised to purchase common stock (in shares)       0.1
Convertible Preferred Shares        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive options excluded from calculation of earnings per share, number of options 0.7 0.7 0.7 0.7
Warrant        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive options excluded from calculation of earnings per share, number of options 1.6   1.6  
Stock Options        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive options excluded from calculation of earnings per share, number of options 0.1     0.2
Common Stock Equivalents        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive options excluded from calculation of earnings per share, number of options 0.3     0.3
Restricted Stock        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive options excluded from calculation of earnings per share, number of options 0.1 0.1 0.1 0.1
Employee Stock Option        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive options excluded from calculation of earnings per share, number of options 3.8 2.5 3.6 2.5
Antidilutive options excluded from calculation of earnings per share, weighted average exercise price (in usd per share) $ 54.89 $ 60.31 $ 56.48 $ 60.51