Investment in TiO2 Manufacturing Joint Venture and Other Assets - Summary of Financial Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financial Information [Line Items]
Current assets	$ 1,475.4	$ 1,589.5
Property and equipment, net	517.3	523.8	$ 563.6
Total assets	2,737.0	2,835.7	3,005.2
Other liabilities, primarily current	30.1	22.9
Total liabilities and equity	2,737.0	2,835.7
Net sales	1,977.1	2,266.2	2,335.4
Cost of sales	1,676.5	1,732.1	1,716.2
General and administrative	277.4	304.0	311.9
Total costs and expenses	1,996.6	2,096.3	2,077.6
Net income	2.9	136.1	197.7
Louisiana Pigment Company
Financial Information [Line Items]
Current assets	118.5	122.2
Property and equipment, net	148.4	147.4
Total assets	266.9	269.6
Other liabilities, primarily current	42.1	41.2
Partners' equity	224.8	228.4
Total liabilities and equity	266.9	269.6
Net sales	463.4	451.5	378.2
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 | Kronos
Financial Information [Line Items]
Net sales	231.7	225.6	188.6
Louisiana Pigment Company | Venator Investments LLC
Financial Information [Line Items]
Net sales	$ 231.7	$ 225.9	$ 189.6