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Earnings Per Share Attributable to Common Stockholders (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Earnings Per Share Basic And Diluted [Line Items]        
Net income available to common stockholders $ 66.9 $ 54.7 $ 264.7 $ 99.1
Weighted average number of shares outstanding:        
Basic weighted average shares outstanding (in shares) 184,304,993 182,148,717 183,752,510 161,724,677
Diluted weighted average shares outstanding (in shares) 185,499,988 183,601,601 184,999,899 162,916,593
Earnings per share available to common stockholders:        
Basic (usd per share) $ 0.36 $ 0.30 $ 1.44 $ 0.61
Diluted (usd per share) $ 0.36 $ 0.30 $ 1.43 $ 0.61
Share units        
Weighted average number of shares outstanding:        
Effect of dilutive securities: Share units and Stock options and employee share purchase plan (in shares) 590,407 875,477 617,090 655,762
Stock options and employee share purchase plan        
Weighted average number of shares outstanding:        
Effect of dilutive securities: Share units and Stock options and employee share purchase plan (in shares) 604,588 577,407 630,299 536,154