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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Numerator    
Net income $ 1.0 $ 38.6
Less: Net income attributable to participating securities 0.0 (1.6)
Net income attributable to common shareholders - Basic and Dilutive $ 1.0 $ 37.0
Denominators    
Basic - Weighted-average shares outstanding 118.8 118.3
Basic - Less: Participating securities (4.6) (4.8)
Basic - Weighted-average common shares outstanding 114.2 113.5
Effect of dilutive securities - dilutive stock-based compensation 0.5 0.0
Diluted - Adjusted weighted-average shares after assumed conversions 114.7 113.5
Basic EPS $ 0.01 $ 0.33
Diluted EPS $ 0.01 $ 0.33