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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Tax Credit Carryforward [Line Items]      
Deferred Tax Assets, Valuation Allowance $ 8.0 $ 7.6  
Deferred Tax Assets, Tax Credit Carryforwards 9.6 8.6  
Deferred Income Tax Assets, Net [1] 1.7 0.8  
Deferred tax liabilities and other long-term obligations 89.7 36.0  
Deferred Tax Liabilities, Other 0.7 1.2  
Deferred Tax Liabilities, Tax Deferred Expense, Compensation and Benefits Pension and Other Postretirement Benefits 0.0 (0.5)  
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit   $ 10.4 $ 68.4
Valuation allowances, State Tax Credits [Member]      
Tax Credit Carryforward [Line Items]      
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ 2.6    
[1] Included in "Other assets, net" on our accompanying December 31, 2024 and 2023 Consolidated Balance Sheets.