Investment in TiO2 Manufacturing Joint Venture - Summary of Income Statements of LPC (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cost and expenses:
Net income	$ (49.1)	$ 104.5	$ 112.9
Louisiana pigment company, L.P
Revenues and other income:
Total revenues and other income	463.4	451.5	378.2
Cost and expenses:
Cost of sales	463.0	451.1	377.8
General and administrative	0.4	0.4	0.4
Total costs and expenses	463.4	451.5	378.2
Louisiana pigment company, L.P | Kronos
Revenues and other income:
Total revenues and other income	231.7	225.6	188.6
Louisiana pigment company, L.P | Venator Investments
Revenues and other income:
Total revenues and other income	$ 231.7	$ 225.9	$ 189.6