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Investment in TiO2 Manufacturing Joint Venture - Summary of Income Statements of LPC (Detail) - Louisiana Pigment Company, L.P. - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Revenues and other income:      
Total revenues and other income $ 315.4 $ 339.0 $ 386.9
Cost and expenses:      
Cost of sales 314.9 338.5 386.4
General and administrative 0.5 0.5 0.5
Total costs and expenses 315.4 339.0 386.9
Kronos      
Revenues and other income:      
Total revenues and other income 157.9 176.5 193.1
HPA      
Revenues and other income:      
Total revenues and other income $ 157.5 $ 162.5 $ 193.8