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Earnings (Losses) Per Share (Schedule of Earnings (Losses) Per Share) (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Earnings Per Share [Line Items]        
Net (loss) income attributable to the Company $ (104.0) $ (1.7) $ 58.7 $ 182.7
Basic weighted-average shares 103.6 104.2 103.9 104.4
Diluted weighted-average shares 103.6 104.2 104.3 104.7
Basic $ (1.00) $ (0.02) $ 0.56 $ 1.75
Diluted $ (1.00) $ (0.02) $ 0.56 $ 1.75
RSUs and PRSUs        
Earnings Per Share [Line Items]        
Effect of dilutive restricted stock units ("RSUs") and performance restricted stock units ("PRSUs") 0.0 0.0 0.4 0.3