v3.26.1
Earnings per Share - Reconciliation of Numerator and Denominator Used in the Calculation of Net Earnings Per Basic and Diluted Share and the Anti-Dilutive Share-Based Awards (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Earnings Per Share Basic And Diluted [Line Items]    
Basic $ 1.3 $ 1.08
Diluted $ 1.27 $ 1.05
Net Income (Loss) $ 33.5 $ 31.0
Weighted average number of common shares outstanding 25.7 28.7
Dilutive awards 0.6 0.8
Diluted weighted average number of common shares outstanding 26.3 29.5
Restricted Stock Units    
Earnings Per Share Basic And Diluted [Line Items]    
Weighted-average number of anti-dilutive share-based awards 0.1 0.0