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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Tax Credit Carryforward [Line Items]    
Deferred Tax Assets, Valuation Allowance $ 9.0 $ 10.8
Unrecognized tax benefits , if recognized, would favorably impact effective tax rate 80.9  
Unrecognized Tax Benefits, Interest on Income Taxes Accrued 1.5 0.4
Deferred Tax Assets, Tax Credit Carryforwards 10.6 10.1
Deferred Income Tax Assets, Net [1] 0.8 0.6
Deferred tax liabilities and other long-term obligations 128.9 142.7
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit 10.4 68.4
Deferred Tax Liabilities, Other 1.4 1.2
Deferred Tax Liabilities, Tax Deferred Expense, Compensation and Benefits Pension and Other Postretirement Benefits (0.5) $ 0.0
Valuation allowances, State Tax Credits [Member]    
Tax Credit Carryforward [Line Items]    
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ 2.9  
[1] Included in "Other assets, net" on our accompanying December 31, 2023 and 2022 Consolidated Balance Sheets.