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Investment in Kronos Worldwide, Inc. - Selected Financial Information of Kronos Balance Sheet (Detail) - Kronos - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
Schedule Of Equity Method Investments [Line Items]    
Current assets $ 1,203.1 $ 1,201.4
Property and equipment, net 482.4 486.4
Investment in TiO2 joint venture 82.1 81.3
Other noncurrent assets 159.5 129.0
Total assets 1,927.1 1,898.1
Current liabilities 241.3 233.4
Long-term debt 445.8 455.1
Accrued pension and postretirement benefits 256.3 262.9
Other noncurrent liabilities 132.4 106.9
Stockholders' equity 851.3 839.8
Total liabilities and stockholders' equity $ 1,927.1 $ 1,898.1