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Long-Term Debt - Valhi Contran Credit Facility - Additional Information (Detail) - VALHI, INC. - Contran Credit Facility | 12 Months Ended
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Dec. 31, 2022 USD ($)
Debt Instrument [Line Items] |
Line of credit maximum borrowing capacity | $ 175,000,000
Debt instrument, Interest rate at period end | 8.50%
Interest rate on outstanding borrowings | 1.00%
Debt due date, start date | Dec. 31, 2024
Amount available for borrowing | $ 53,600,000
Debt instrument, interest rate during period | 5.86%
Borrowings of credit facility | $ 100,000
Repayments of credit facility | $ 51,600,000

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