Goodwill - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2024	Jul. 16, 2024
Goodwill [Line Items]
Goodwill	$ 382.3	$ 379.7
Aggregate goodwill impairment	0.0	0.0	$ 0.0
Consolidated gross goodwill	398.8
Kronos Worldwide | Louisiana Pigment Company
Goodwill [Line Items]
Goodwill					$ 2.6	$ 2.6
Percentage acquired					50.00%	50.00%
Component Products [Member]
Goodwill [Line Items]
Goodwill	$ 27.1	$ 27.1
Aggregate goodwill impairment				$ 16.5