XML 64 R54.htm IDEA: XBRL DOCUMENT v3.7.0.1
Long-Term Debt - Valhi Contran Credit Facility - Additional Information (Detail) - VALHI, INC. - Contran Credit Facility
3 Months Ended
Mar. 31, 2017
USD ($)
Debt Instrument [Line Items]  
Borrowings or repayments $ 0
Debt instrument, Interest rate at period end 5.00%
Debt instrument, average interest rate during period 4.80%
Amount available for borrowing $ 46,100,000