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Earnings Per Share - Reconciliation of Net Income to Basic and Diluted EPS (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Earnings Per Share [Abstract]        
Net income $ 60.8 $ 40.3 $ 112.4 $ 67.7
Weighted average shares outstanding - Basic (shares) 61.0 60.7 61.0 60.7
Dilutive effect of common stock equivalents (shares) 0.7 0.7 0.7 0.7
Weighted average shares outstanding - Diluted (shares) 61.7 61.4 61.7 61.4
Basic earnings per share:        
Earnings per share (usd per share) $ 1.00 $ 0.66 $ 1.84 $ 1.12
Diluted earnings per share:        
Earnings per share (usd per share) $ 0.99 $ 0.66 $ 1.82 $ 1.10