Related Party Transactions - Receivables from and Payables to Affiliates (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current receivables from affiliates:
Receivable from affiliates	$ 23.9us-gaap_DueFromRelatedPartiesCurrent	$ 14.7us-gaap_DueFromRelatedPartiesCurrent
Current payables to affiliates:
Payable to affiliates	46.0us-gaap_DueToRelatedPartiesCurrent	51.5us-gaap_DueToRelatedPartiesCurrent
Payables to affiliate included in long-term debt	223.7us-gaap_DueToAffiliateNoncurrent	376.5us-gaap_DueToAffiliateNoncurrent
Louisiana Pigment Company
Current receivables from affiliates:
Receivable from affiliates	13.0	14.2
Current payables to affiliates:
Payable to affiliates	19.9	21.1
Contran
Current receivables from affiliates:
Trade items	0.2	0.5
Income taxes	9.2
Current payables to affiliates:
Income taxes, net		4.3
Trade items	26.1	26.1
VALHI, INC. \| Contran \| Credit Facility
Current payables to affiliates:
Payables to affiliate included in long-term debt	223.7	206.5
Kronos Worldwide, Inc. \| Contran \| Note Payable
Current payables to affiliates:
Payables to affiliate included in long-term debt		170.0
Other
Current receivables from affiliates:
Receivable from affiliates	$ 1.5

Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount of receivables arising from transactions with related parties due within one year or the normal operating cycle, if longer.

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The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle).

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Amount of receivables owed to an entity that is affiliated with the reporting entity by means of direct or indirect ownership, which are usually due after one year (or one business cycle, if longer).

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Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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Due from related party current income taxes.

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Due to related party current income axes.

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