Net Sales - Disaggregation of Revenue by Product Line (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Net sales	$ 365.1	$ 390.6	$ 649.1	$ 730.7
Performance Materials segment
Disaggregation of Revenue [Line Items]
Net sales	153.9	157.2	300.7	302.3
Performance Materials segment | Road Technologies product line
Disaggregation of Revenue [Line Items]
Net sales	119.5	129.1	163.8	174.8
Performance Materials segment | Industrial Specialties product line
Disaggregation of Revenue [Line Items]
Net sales	48.4	56.4	99.1	157.7
Performance Chemicals segment
Disaggregation of Revenue [Line Items]
Net sales	167.9	185.5	262.9	332.5
Advanced Polymer Technologies segment
Disaggregation of Revenue [Line Items]
Net sales	$ 43.3	$ 47.9	$ 85.5	$ 95.9