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Income Taxes - Summary of Components of Income Tax Expense (Benefit) (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Current:      
Federal $ 80.7 $ 38.3 $ (16.4)
Foreign 68.0 32.4 74.8
State 0.4 15.6 7.7
Current income tax expense 149.1 86.3 66.1
Deferred:      
Federal 0.3 (83.7) (97.1)
Foreign (23.3) (7.7) (1.8)
State 7.3 (9.9) (6.4)
Deferred income tax benefit (183.3) (118.4) (147.5)
Total expense (benefit) for income taxes 133.4 (15.0) (39.2)
Continuing Operations      
Deferred:      
Deferred income tax benefit $ (15.7) $ (101.3) $ (105.3)