Other Accrued Liabilities - Summary of Other Accrued Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Other Liabilities Disclosure [Abstract]
Self insurance	$ 4.1	$ 3.7	$ 4.0
Sales incentive programs	5.4	7.4	5.9
Short-term environmental	1.1	1.1	1.1
Other accruals	4.6	3.6	3.4
Other accrued liabilities	$ 15.2	$ 15.8	$ 14.4