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Net Income (Loss) from Continuing Operations Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]    
Income from continuing operations $ 36.9 $ 18.5
Series A Preferred Stock dividends (11.1) (11.1)
Income from continuing operations attributable to participating securities (6.4) (1.8)
Income from continuing operations attributable to common stockholders $ 19.4 $ 5.6
Shares outstanding    
Weighted average common shares outstanding 107.2 108.3
Effect of dilutive stock options and restricted stock awards 1.4 0.9
Weighted average common shares outstanding and potential common shares 108.6 109.2
Income from continuing operations per share - basic    
Basic (in dollars per share) $ 0.18 $ 0.05
Income from continuing operations per share - diluted    
Diluted (in dollars per share) $ 0.18 $ 0.05
Earnings Per Share, Diluted, Other Disclosure    
Stock options outstanding (in shares) 3.4 4.5
Service options    
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]    
Shares attributable to options excluded from the calculation of diluted net income per share 0.0 0.4
Market Options    
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]    
Shares attributable to options excluded from the calculation of diluted net income per share 2.3 3.6
PRSUs    
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]    
Securities excluded from calculation of earnings per share amount due to performance conditions not yet satisfied 1.1 1.3