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Net Income Per Common Share - Summary of Earnings Per Share Basic and Diluted (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Basic net income per common share:    
Net income $ 28.9 $ 36.5
Weighted average common shares outstanding - Basic (in shares) 81.1 83.9
Basic net income per common share $ 0.36 $ 0.44
Diluted net income per common share:    
Net income $ 28.9 $ 36.5
Weighted average common shares outstanding - Basic (in shares) 81.1 83.9
Plus incremental shares from assumed conversions:    
Weighted average common shares outstanding - Dilutive (in shares) 81.7 84.8
Diluted net income per common share $ 0.35 $ 0.43
Restricted Stock Units    
Plus incremental shares from assumed conversions:    
Incremental shares from assumed conversions 0.4 0.5
Employee Stock Option    
Plus incremental shares from assumed conversions:    
Incremental shares from assumed conversions 0.2 0.4