Goodwill and Other Intangible Assets, net (Tables)

6 Months Ended

Jun. 30, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

	Reporting Units
In millions	Performance Materials		Performance Chemicals		Advanced Polymer Technologies		Total
Balance as of December 31, 2024 (1)	$	4.3	$	—	$	170.9	$	175.2
Foreign currency translation	—		—		12.9		12.9
Goodwill impairment charge	—		—		(183.8)		(183.8)
Balance as of June 30, 2025	$	4.3	$	—	$	—	$	4.3

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(1) Includes accumulated impairment losses of $349.1 million related to the Performance Chemicals reportable segment.

Schedule of Finite-Lived Intangible Assets

In millions	Customer contracts and relationships		Brands (1)		Developed Technology		Total
Gross Asset Value
December 31, 2024	$	264.9	$	91.4	$	88.7	$	445.0
Retirements	—		—		(1.8)		(1.8)
Foreign currency translation	15.0		6.3		6.0		27.3
June 30, 2025	$	279.9	$	97.7	$	92.9	$	470.5
Accumulated Amortization
December 31, 2024	$	(88.4)	$	(35.4)	$	(42.4)	$	(166.2)
Amortization	(7.6)		(2.8)		(4.8)		(15.2)
Retirements	—		—		0.9		0.9
Foreign currency translation	(5.5)		(2.1)		(3.3)		(10.9)
June 30, 2025	$	(101.5)	$	(40.3)	$	(49.6)	$	(191.4)
Other intangibles, net	$	178.4	$	57.4	$	43.3	$	279.1

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(1) Represents trademarks, trade names, and know-how.

Intangible assets subject to amortization were attributed to our business segments as follows:

In millions	June 30, 2025		December 31, 2024
Performance Materials	$	1.1	$	1.2
Performance Chemicals	97.0		102.5
Advanced Polymer Technologies	181.0		175.1
Other intangibles, net	$	279.1	$	278.8

Schedule of Finite-lived Intangible Assets Amortization Expense

The amortization expense related to our intangible assets in the table above is shown in the table below.

	Three Months Ended June 30,				Six Months Ended June 30,
In millions	2025		2024		2025		2024
Selling, general, and administrative expenses	$	7.7	$	7.5	$	15.2	$	17.0
Restructuring and other (income) charges, net (1)	—		—		—		22.1
Total amortization expense	$	7.7	$	7.5	$	15.2	$	39.1

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(1) Amounts recorded to Restructuring and other (income) charges, net are not included within segment depreciation and amortization.