v3.26.1
Earnings Per Share (Calculation of Basic and Diluted Earnings per Share) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Calculation of Basic and Diluted Earnings per Share [Abstract]        
Net income $ 14.2 $ 29.3 $ 19.7 $ 50.2
Weighted-average number of common shares outstanding - basic (in shares) 41.0 43.8 41.2 43.8
Dilutive effect of common share equivalents (in shares) 0.0 0.2 0.0 0.2
Weighted-average number of common shares and share equivalents outstanding - diluted (in shares) 41.0 44.0 41.2 44.0
Basic earnings per share (in dollars per share) $ 0.35 $ 0.67 $ 0.48 $ 1.15
Diluted earnings per share (in dollars per share) $ 0.35 $ 0.67 $ 0.48 $ 1.14