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Segment Information - Depreciation and amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information
Depreciation and amortization	$ 108.3	$ 122.8	$ 108.8
Performance Materials
Segment Reporting Information
Depreciation and amortization	38.7	38.3	36.1
Performance Chemicals
Segment Reporting Information
Depreciation and amortization	38.8	53.2	43.1
Advanced Polymer Technologies segment
Segment Reporting Information
Depreciation and amortization	$ 30.8	$ 31.3	$ 29.6

X

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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