Investment in TiO2 Manufacturing Joint Venture and Other Assets - Summary of Financial Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financial Information [Line Items]
Current assets	$ 1,589.5	$ 1,673.2
Property and equipment, net	523.8	563.6	$ 590.4
Total assets	2,835.7	3,005.2	2,889.3
Other liabilities, primarily current	60.4	57.9
Total liabilities and equity	2,835.7	3,005.2
Net sales	2,266.2	2,335.4	1,878.1
Cost of sales	1,732.1	1,716.2	1,437.6
General and administrative	304.0	311.9	283.6
Total costs and expenses	2,096.3	2,077.6	1,777.5
Net income	136.1	197.7	89.0
Louisiana Pigment Company
Financial Information [Line Items]
Current assets	122.2	111.7
Property and equipment, net	147.4	142.6
Total assets	269.6	254.3
Other liabilities, primarily current	41.2	47.8
Partners' equity	228.4	206.5
Total liabilities and equity	269.6	254.3
Net sales	451.5	378.2	336.1
Cost of sales	451.1	377.8	335.7
General and administrative	0.4	0.4	0.4
Total costs and expenses	451.5	378.2	336.1
Louisiana Pigment Company | Kronos
Financial Information [Line Items]
Net sales	225.6	188.6	167.8
Louisiana Pigment Company | Venator Investments LLC
Financial Information [Line Items]
Net sales	$ 225.9	$ 189.6	$ 168.3