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Net Income Per Common Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Earnings Per Share [Abstract]        
Net income to common shareholders $ 60.9 $ 44.1 $ 121.4 $ 85.6
Basic weighted average shares outstanding (in shares) 221.6 221.0 221.4 222.8
Diluted weighted average shares outstanding (in shares) 222.5 221.4 222.3 223.3
Net income per common share:        
Basic net income per share (in dollars per share) $ 0.27 $ 0.20 $ 0.55 $ 0.38
Diluted net income per share (in dollars per share) $ 0.27 $ 0.20 $ 0.55 $ 0.38
Antidilutive securities excluded from computation of earnings per share (in shares) 0.1 1.3 0.5 1.2