Commitments and Contingencies - Environmental Matters (Details) $ in Millions		12 Months Ended
	Dec. 22, 2017 USD ($) defendant	Dec. 31, 2019 facility
United States
Loss Contingencies [Line Items]
Number of facilities owned | facility		4
Settled with the U.S. government | Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Number of carbon black producers (defendants) | defendant	5
Period to install pollution control technology	6 years
Civil penalty	$ 0.8
Cost of environmental mitigation projects	$ 0.6
Settled with the U.S. government | Unfavorable Regulatory Action | Louisiana
Loss Contingencies [Line Items]
Period to install pollution control technology	1 year
Settled with the U.S. government | Unfavorable Regulatory Action | Louisiana | Maximum
Loss Contingencies [Line Items]
Estimated capital expenditures to be incurred for installments	$ 190.0