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Investment in TiO2 Manufacturing Joint Venture and Other Assets - Other Noncurrent Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Other noncurrent assets:    
Restricted cash and cash equivalents $ 37.2 $ 41.9
Note receivables - OPA 49.3 38.7
Land held for development 29.7 36.0
IBNR receivables 16.8 34.4
Operating lease right-of-use assets $ 21.5 $ 19.9
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Total Total
Restricted Cash and Cash Equivalents, Noncurrent, Statement of Financial Position [Extensible Enumeration] Total Total
Other $ 24.3 $ 16.8
Total $ 178.8 $ 187.7