Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Goodwill and Other Intangible Assets [Abstract]
Balance Beginning	$ 913.8	$ 913.6
Change in goodwill relating to:
Foreign exchange translation	2.1	0.2
Total Changes	2.1	0.2
Balance Ending	915.9	913.8
Consumer & Specialties [Member]
Goodwill and Other Intangible Assets [Abstract]
Balance Beginning	345.7	345.2
Change in goodwill relating to:
Foreign exchange translation	1.5	0.5
Total Changes	1.5	0.5
Balance Ending	347.2	345.7
Engineered Solutions [Member]
Goodwill and Other Intangible Assets [Abstract]
Balance Beginning	568.1	568.4
Change in goodwill relating to:
Foreign exchange translation	0.6	(0.3)
Total Changes	0.6	(0.3)
Balance Ending	$ 568.7	$ 568.1