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Earnings Per Share - Earnings Per Share Reconciliation (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Earnings Per Share [Abstract]        
Net Income (Loss) $ 24.4 $ 45.4 $ 175.0 $ 182.5
Weighted average shares - Basic (in shares) 70.5 67.3 69.2 66.7
Dilutive effect of equity compensation 0.1 0.1 0.1 0.0
Weighted average shares - diluted (in shares) 70.6 67.4 69.3 66.7
Net income available for common stock, per share - Diluted $ 0.35 $ 0.67 $ 2.52 $ 2.74