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Earnings per Share (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Reconciliation of information used in computing basic and diluted earnings per share [Abstract]        
Net (loss) earnings $ (259.3) $ 13.6 $ (256.8) $ 8.4
Basic:        
Net earnings (loss) per share, basic $ (2.90) $ 0.15 $ (2.87) $ 0.09
Basic (in shares) 89,400,000 91,400,000 89,500,000 91,400,000
Diluted:        
Net earnings (loss) per share, diluted $ (2.90) $ 0.15 $ (2.87) $ 0.09
Diluted (in shares) 89,400,000 91,800,000 89,500,000 92,100,000
Share-based Payment Arrangement        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Weighted average number of anti-dilutive shares excluded from the calculation (in shares) 1,800,000 3,300,000 2,600,000 2,400,000