v3.26.1
Earnings Per Share - Summary of Computation of Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Earnings Per Share [Abstract]            
Net income $ 14.1 $ 19.4 $ 29.2 $ (13.2) $ 33.5 $ 16.0
Determination of shares:            
Weighted-average number of common shares outstanding 94.0   91.6   93.3 92.5
Shares issuable on exercise of stock awards, net of shares assumed to be purchased out of proceeds at average market price 1.6   1.5   2.4 1.8
Average common shares outstanding for fully diluted computation [1] 95.6   93.1   95.7 94.3
Per share:            
Basic income per share $ 0.15   $ 0.32   $ 0.36 $ 0.17
Diluted income per share $ 0.15   $ 0.31   $ 0.35 $ 0.17
Shares outstanding as of June 30, 92.3   90.1   92.3 90.1
Common stock shares issued not disclosed         false  
Number of authorized shares not disclosed         false  
[1] Diluted by assumed exercise of stock-based compensation awards using the treasury stock method.