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Investment in TiO2 Manufacturing Joint Venture - Summary of Income Statements of LPC (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cost and expenses:      
Net income $ 104.5 $ 112.9 $ 63.9
Louisiana Pigment Company, L.P.      
Revenues and other income:      
Total revenues and other income 451.5 378.2 336.1
Cost and expenses:      
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, L.P. | Kronos      
Revenues and other income:      
Total revenues and other income 225.6 188.6 167.8
Louisiana Pigment Company, L.P. | Venator Investments LLC      
Revenues and other income:      
Total revenues and other income $ 225.9 $ 189.6 $ 168.3