Investment in TiO2 Manufacturing Joint Venture and Other Assets - Schedule of Maturities of Operating Lease Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Gross amounts due each year:
2022	$ 4.2
2023	3.0
2024	2.1
2025	1.6
2026	1.4
2027 and thereafter	17.6
Total remaining lease payments	29.9
Less imputed interest	10.4
Total lease obligations	$ 19.5
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Accrued liabilities, Other liabilities
Less current obligations	$ 3.7	$ 6.7
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued liabilities	Accrued liabilities
Long term lease obligations	$ 15.8	$ 18.8
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities