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Income Taxes - Summary of Tax Expenses (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]      
Current Federal $ 55.4 $ 132.3 $ 244.3
Current State 2.8 18.5 36.8
Current foreign 11.6 18.3 19.6
Current Income Tax Expense (Benefit), Total 69.8 169.1 300.7
Deferred Federal (8.6) (80.3) 64.8
Deferred State (10.9) (25.2) 24.0
Deferred Foreign 8.6 (3.2) 2.7
Deferred Income Tax Expense (Benefit), Total (10.9) (108.7) 91.5
Income tax $ 58.9 $ 60.4 $ 392.2