GOODWILL AND INTANGIBLE ASSETS - Schedule of Changes in Carrying Amount of Goodwill by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 1,659.7	$ 1,719.3
Currency translation	97.9	(59.6)
Goodwill, Ending Balance	1,757.6	1,659.7
Specialty Engineered Materials
Goodwill [Roll Forward]
Goodwill, Beginning Balance	656.3	682.5
Currency translation	55.1	(26.2)
Goodwill, Ending Balance	711.4	656.3
Color, Additives and Inks
Goodwill [Roll Forward]
Goodwill, Beginning Balance	1,003.4	1,036.8
Currency translation	42.8	(33.4)
Goodwill, Ending Balance	$ 1,046.2	$ 1,003.4