v3.26.3
Net Earnings (Loss) Per Share - Calculations of Net Earnings Per Share - Basic and Diluted (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]              
Net earnings (loss) $ 34.1 $ 53.5 $ 2.5 $ 18.0 $ 5.6 $ 90.1 $ (43.5)
Weighted-average common shares outstanding (in millions)              
Weighted-average common shares outstanding - basic 46.9     46.5   46.8 46.6
Weighted-average common shares outstanding - diluted 48.1     46.9   47.6 46.6
Net earnings (loss) per share - basic $ 0.73     $ 0.39   $ 1.93 $ (0.93)
Net earnings (loss) per share - diluted $ 0.71     $ 0.38   $ 1.89 $ (0.93)
Employee Stock Option              
Weighted-average common shares outstanding (in millions)              
Effect of dilutive securities - share-based awards 1.2     0.4   0.8 0.0