Employee Benefit Plans - Schedule of Combined Funded Status and Net Periodic Pension Cost and Postretirement Benefit - Postretirement Benefits (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Amounts recognized in Consolidated Balance Sheets
Noncurrent liability	$ 27.7	$ 17.7
Other Postretirement Benefits Plan [Member]
Change in Benefit Obligation:
Beginning balance	8.8	12.6
Interest cost	0.4	0.2	$ 0.1
Participant contributions		0.6
Actuarial gain	(0.3)	(3.1)
Benefits paid	(0.4)	(1.5)
Ending balance	8.5	8.8	$ 12.6
Change in Plan Assets:
Company contributions	0.4	0.9
Participant contributions	0.4	0.6
Benefits paid	(0.8)	(1.5)
Funded status of plans	(8.5)	(8.8)
Amounts recognized in Consolidated Balance Sheets
Current liability	1.5	1.6
Noncurrent liability	7.0	7.2
Amounts recognized in Accumulated Other Comprehensive Loss
Accumulated other comprehensive loss (income), net of tax of $(4.7) million and $(5.4) million, respectively	$ (7.1)	$ (8.4)