Commitments and Contingencies - Schedule of Environmental Remediation Reserve Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Environmental remediation reserve activity
Beginning remediation accrual balance	$ 2.7	$ 2.8	$ 3.2
Current period expenses		0.3	0.1
Cash expenditures	(0.2)	(0.4)	(0.5)
Ending remediation accrual balance	$ 2.5	$ 2.7	$ 2.8