Income Taxes - Components of Net Deferred Tax Liability (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Components of Deferred Tax Assets and Liabilities [Abstract]
Inventories	$ 373,000	$ 369,000
Accrued OPEB costs	139,000	168,000
Accrued pension costs	124,000	412,000
Accrued employee benefits	1,421,000	1,342,000
Accrued environmental liabilities	21,332,000	24,332,000
Other accrued liabilities and deductible differences	149,000	161,000
Adjusted gross deferred tax assets (liabilities)	23,538,000	26,784,000
Netting of items by tax jurisdiction	(23,538,000)	(26,784,000)
Marketable securities	(3,586,000)	(5,290,000)
Property and equipment	(1,467,000)	(2,025,000)
Goodwill	(1,693,000)	(1,693,000)
Other taxable differences	(2,392,000)	(2,391,000)
Investment in Kronos Worldwide, Inc.	(56,133,000)	(65,504,000)
Adjusted gross deferred tax assets (liabilities)	(65,271,000)	(76,903,000)
Netting of items by tax jurisdiction	23,538,000	26,784,000
Net noncurrent deferred tax liability	(41,733,000)	(50,119,000)
Net noncurrent deferred tax liability	$ (41,733)	$ (50,119)