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Earnings Per Common Share (Tables)
 9 Months Ended
Sep. 30, 2024
Earnings Per Share [Abstract]  
Schedule of Computation of Basic and Diluted Earnings Per Share
The following table summarizes the computation of basic and diluted earnings per common share for the periods presented (in millions, except per share data):
Three Months Ended September 30,Nine Months Ended September 30,
 2024202320242023
(Loss) earnings per common share—basic
Net (loss) income$(3.6)$29.7 $65.0 $172.1 
Weighted-average common shares outstanding—basic183.8 185.2 183.7 185.2 
(Loss) earnings per common share—basic$(0.02)$0.16 $0.35 $0.93 
(Loss) earnings per common share—diluted
Net (loss) income$(3.6)$29.7 $65.0 $172.1 
Interest expense attributable to convertible notes, net of tax— 1.6 4.9 4.8 
Net (loss) income attributable to earnings per common share—diluted$(3.6)$31.3 $69.9 $176.9 
Weighted-average common shares outstanding—basic183.8 185.2 183.7 185.2 
Incremental shares for assumed conversion of Convertible Notes— 14.7 14.7 14.7 
Outstanding options, restricted stock units and performance share units— 1.3 0.9 1.4 
Weighted-average common shares outstanding—diluted183.8 201.2 199.3 201.3 
(Loss) earnings per common share—diluted$(0.02)$0.16 $0.35 $0.88