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Revenues - Revenue by segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 1,668.3	$ 1,391.5	$ 1,216.1
Performance Materials segment
Disaggregation of Revenue [Line Items]
Net sales	548.5	516.8	510.0
Performance Chemicals segment
Disaggregation of Revenue [Line Items]
Net sales	1,119.8	874.7	706.1
Performance Chemicals segment | Pavement Technologies product line
Disaggregation of Revenue [Line Items]
Net sales	241.3	195.4	186.8
Performance Chemicals segment | Industrial Specialties product line
Disaggregation of Revenue [Line Items]
Net sales	633.8	493.5	391.6
Performance Chemicals segment | Engineered Polymers product line
Disaggregation of Revenue [Line Items]
Net sales	$ 244.7	$ 185.8	$ 127.7

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