Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2024

Goodwill and Other Intangible Assets [Abstract]

Goodwill

The balance of goodwill by reporting unit and the activity occurring in the past two fiscal years is as follows:

(millions of dollars)	Consumer & Specialties			Engineered Solutions			Consolidated
Balance at December 31, 2022	$	346.4		$	568.4		$	914.8
Change in goodwill relating to:
Foreign exchange translation		(1.2	)		—			(1.2	)
Total Changes	$	(1.2	)	$	—		$	(1.2	)
Balance at December 31, 2023	$	345.2		$	568.4		$	913.6
Change in goodwill relating to:
Foreign exchange translation		0.5			(0.3	)		0.2
Total Changes	$	0.5		$	(0.3	)	$	0.2
Balance at December 31, 2024	$	345.7		$	568.1		$	913.8

Acquired Intangible Assets Subject to Amortization

Acquired intangible assets subject to amortization as of December 31, 2024 and December 31, 2023 were as follows:

			December 31, 2024						December 31, 2023
			(in millions of dollars)						(in millions of dollars)
	Weighted Average Useful Life (Years)		Gross Carrying Amount			Accumulated Amortization			Gross Carrying Amount			Accumulated Amortization
Tradenames		34		$	221.5		$	63.0		$	221.5		$	59.1
Technology		13			18.8			15.1			18.8			14.2
Patents and trademarks		19			6.4			6.4			6.4			6.4
Customer relationships		21			77.5			21.6			79.0			15.0
		29		$	324.2		$	106.1		$	325.7		$	94.7