v3.26.3
Common Equity - Calculation of Basic and Diluted Earnings Per Share (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
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Basic earnings per common share                
Net income available to common shareholders $ 49.5 $ 49.7 $ 20.4 $ 19.4 $ 36.0 $ 26.1 $ 119.6 $ 81.5
Weighted average common shares outstanding 175.3     175.3     175.2 175.3
Diluted earnings per common share                
Dilutive effect of share-based awards and options outstanding 0.9     0.6     0.8 0.6
Weighted average diluted shares outstanding 176.3     175.9     176.0 175.9
Basic earnings per share $ 0.28     $ 0.11     $ 0.68 $ 0.47
Diluted earnings per share $ 0.28     $ 0.11     $ 0.68 $ 0.46