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Long-Term Debt - Valhi Contran Credit Facility - Additional Information (Detail)
$ in Thousands
3 Months Ended
Mar. 31, 2023
USD ($)
Debt Instrument [Line Items]  
Line of credit maximum borrowing capacity $ 60,800
Debt instrument, Interest rate at period end 9.00%
Debt instrument, Interest rate during period 8.69%
VALHI, INC. | Contran Credit Facility  
Debt Instrument [Line Items]  
Borrowings of credit facility $ 0
Repayments of credit facility $ 7,200