Investment in TiO2 Manufacturing Joint Venture and Other Assets - Components of Net Distributions from LPC (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments In And Advances To Affiliates Schedule Of Investments [Abstract]
Distributions from LPC	$ 28.5	$ 32.7	$ 40.6
Contributions to LPC	(24.7)	(45.5)	(49.9)
Net distributions (contributions)	$ 3.8	$ (12.8)	$ (9.3)

Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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