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Net Earnings per Common Share - Schedule of Basic and Diluted Net Earnings Per Common Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Numerator:      
Net earnings $ 505.5 $ 264.7 $ 341.6
Distributed and allocated undistributed net earnings to unvested restricted stockholders 0.0 0.0 0.0
Net earnings available to common stockholders $ 505.5 $ 264.7 $ 341.6
Denominator:      
Weighted average number of common shares outstanding - basic (in shares) 146.9 145.5 144.4
Basic net earnings per common share:      
Basic net earnings per common share (in dollars per share) $ 3.44 $ 1.82 $ 2.37
Numerator:      
Net earnings available to common stockholders $ 505.5 $ 264.7 $ 341.6
Denominator:      
Weighted average number of common shares outstanding - basic (in shares) 146.9 145.5 144.4
Effect of dilutive stock shares and units (in shares) 0.6 0.5 0.5
Weighted average number of common shares outstanding - diluted under treasury stock (in shares) 147.5 146.0 144.9
Diluted net earnings per common share - (in dollars per share) $ 3.43 $ 1.81 $ 2.36