Related Party Transactions - Receivables from and Payables to Affiliates (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Current receivables from affiliates:
Receivable from affiliates	$ 10.3	$ 23.9
Current payables to affiliates:
Payable to affiliates	45.5	46.0
Louisiana Pigment Company
Current receivables from affiliates:
Receivable from affiliates		13.0
Current payables to affiliates:
Payable to affiliates	19.4	19.9
Contran
Current receivables from affiliates:
Trade items	0.2	0.2
Income taxes	7.6	9.2
Current payables to affiliates:
Trade items	26.1	26.1
VALHI, INC. | Contran | Credit Facility
Current payables to affiliates:
Payables to affiliate included in long-term debt	263.8	223.7
Other
Current receivables from affiliates:
Receivable from affiliates	$ 2.5	$ 1.5