Related Party Transactions - Receivables from and Payables to Affiliates (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Current receivables from affiliates:
Receivable from affiliates	$ 2.9	$ 18.5
Current payables to affiliates:
Payable to affiliates	22.9	18.8
Contran
Current receivables from affiliates:
Contran trade items	0.2	0.1
Current payables to affiliates:
Contran income taxes	5.8	1.5
Noncurrent payable to affiliates:
Contran - income taxes	33.4	44.5
Louisiana Pigment Company
Current receivables from affiliates:
Receivable from affiliates		15.8
Current payables to affiliates:
Payable to affiliates	17.1	17.3
VALHI, INC. | Contran | Credit Facility.
Noncurrent payable to affiliates:
Payables to affiliate included in long-term debt	121.4	172.9
Other Affiliates
Current receivables from affiliates:
Receivable from affiliates	$ 2.7	$ 2.6