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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 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Earnings Per Share [Abstract]        
Net income $ 68.1 $ 53.9 $ 185.8 $ 166.3
Weighted average shares outstanding - Basic (shares) 60.7 61.0 60.8 61.0
Dilutive effect of common stock equivalents (shares) 0.7 0.7 0.7 0.7
Weighted average shares outstanding - Diluted (shares) 61.4 61.7 61.5 61.7
Basic earnings per share:        
Earnings per share (usd per share) $ 1.12 $ 0.88 $ 3.06 $ 2.73
Diluted earnings per share:        
Earnings per share (usd per share) $ 1.11 $ 0.87 $ 3.02 $ 2.70