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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 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]        
Income from continuing operations $ 33.4 $ 10.7 $ 70.3 $ 29.2
Series A Preferred Stock dividends (11.1) (11.1) (22.2) (22.2)
Income from continuing operations attributable to participating securities (5.6) 0.0 (12.0) (1.7)
Income (loss) from continuing operations attributable to common stockholders $ 16.7 $ (0.4) $ 36.1 $ 5.3
Shares outstanding        
Weighted average common shares outstanding 107.5 108.6 107.3 108.5
Effect of dilutive stock options and restricted stock awards 1.1 0.0 1.3 0.9
Weighted average common shares outstanding and potential common shares 108.6 108.6 108.6 109.4
Income from continuing operations per share - basic        
Basic (in dollars per share) $ 0.16 $ 0 $ 0.34 $ 0.05
Income from continuing operations per share - diluted        
Diluted (in dollars per share) $ 0.15 $ 0 $ 0.33 $ 0.05
Earnings Per Share, Diluted, Other Disclosure        
Stock options outstanding (in shares) 3.3 4.3 3.3 4.3
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   0.0 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   2.3 3.4
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   1.1 1.3