Related Party Transactions - Receivables from and Payables to Affiliates (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Current receivables from affiliates:
Receivable from affiliates	$ 3.2	$ 10.3
Current payables to affiliates:
Payable to affiliates	51.6	45.5
Contran
Current receivables from affiliates:
Trade items	0.4	0.2
Income taxes		7.6
Current payables to affiliates:
Trade items	31.4	26.1
Income taxes	5.5
Louisiana Pigment Company
Current payables to affiliates:
Payable to affiliates	14.7	19.4
VALHI, INC. | Contran | Credit Facility
Current payables to affiliates:
Payables to affiliate included in long-term debt	278.9	263.8
Other
Current receivables from affiliates:
Receivable from affiliates	$ 2.8	$ 2.5