Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Salaries, wages and employee benefits	$ 46.8	$ 43.7
Interest	4.7	5.1
Environmental	12.1	25.2
Warranty	4.0	4.1
Taxes other than income taxes	12.7	9.1
Operating lease liabilities	9.2	9.3
Other	27.9	27.3
Accrued expenses	$ 117.4	$ 123.8
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent