Investment in TiO2 Manufacturing Joint Venture - Summary of Balance Sheets of LPC (Detail) - Louisiana Pigment Company, L.P. - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
ASSETS
Current assets	$ 94.5	$ 96.2
Property and equipment, net	111.6	110.1
Total assets	206.1	206.3
LIABILITIES AND PARTNERS' EQUITY
Other liabilities, primarily current	45.2	37.8
Partners' equity	160.9	168.5
Total liabilities and partners' equity	$ 206.1	$ 206.3