Contingencies (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) site
Commitments and Contingencies Disclosure [Abstract]
Number of Superfund sites for which company may be liable | site	1
Workers' compensation deductible (per occurrence)	$ 1.0
General liability insurance deductible	3.0
Auto liability insurance deductible	0.3
Workers' compensation accrued liability	21.8
Outstanding letters of credit	$ 17.0