Investment in Kronos Worldwide, Inc. - Additional Information (Detail) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
	Jul. 16, 2024 USD ($) T	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares
Kronos | Lousiana Pigment Company
Schedule Of Equity Method Investments [Line Items]
Percentage of voting interests acquired	50.00%
Equity interest in acquiree percentage	50.00%
Additional production volume acquired in metric tons | T	78,000
Payments to acquire businesses gross	$ 185.0
Business combination contingent consideration liability	$ 15.0
Business combination contingent consideration earn-out period	2 years
Estimated fair value of the earn-out	$ 4.2
Proceeds from lines of credit	132.1
Non-cash gain before tax associated with remeasurement		$ 64.5
Estimated fair value of existing ownership		178.2
Aggregate carrying value		$ 113.7
Kronos | Lousiana Pigment Company | Aggregate EBITDA is 650 Million
Schedule Of Equity Method Investments [Line Items]
Business combination contingent consideration liability	5.0
Expected aggregate EBITDA achieved for earn out period	650.0
Kronos | Lousiana Pigment Company | Aggregate EBITDA is 730 Million
Schedule Of Equity Method Investments [Line Items]
Business combination contingent consideration liability	15.0
Expected aggregate EBITDA achieved for earn out period	730.0
Kronos | Lousiana Pigment Company | Aggregate EBITDA is between 650 Million and 730 Million
Schedule Of Equity Method Investments [Line Items]
Business combination contingent consideration liability	10.0
Kronos | Lousiana Pigment Company | Maximum | Aggregate EBITDA is between 650 Million and 730 Million
Schedule Of Equity Method Investments [Line Items]
Expected aggregate EBITDA achieved for earn out period	730.0
Kronos | Lousiana Pigment Company | Minimum | Aggregate EBITDA is between 650 Million and 730 Million
Schedule Of Equity Method Investments [Line Items]
Expected aggregate EBITDA achieved for earn out period	$ 650.0
Kronos
Schedule Of Equity Method Investments [Line Items]
Number of shares owned | shares			35.2	35.2
Aggregate market value			$ 343.4	$ 350.1
Quoted market price per share | $ / shares			$ 9.75	$ 9.94