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Segment Information - Depreciation and amortization, and capital expenditures (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting Information      
Depreciation and amortization $ 108.8 $ 109.9 $ 100.2
Capital expenditures 142.5 103.8 82.1
Performance Materials      
Segment Reporting Information      
Depreciation and amortization 36.1 36.8 31.2
Capital expenditures 59.8 46.2 30.6
Performance Chemicals      
Segment Reporting Information      
Depreciation and amortization 72.7 73.1 69.0
Capital expenditures $ 82.7 $ 57.6 $ 51.5