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Related Party Transactions - Summary of Current Receivables from and Payables to Affiliates (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Related Party Transaction [Line Items]
Current receivable from affiliate	$ 3.5	$ 2.5
Current payables to affiliates	14.7	19.5
Valhi | Income Tax Receivable
Related Party Transaction [Line Items]
Current receivable from affiliate	0.7
Valhi | Income Tax Payable
Related Party Transaction [Line Items]
Current payables to affiliates		0.1
Other Affiliates | Other Receivable
Related Party Transaction [Line Items]
Current receivable from affiliate	2.8	2.5
Louisiana Pigment Company, L.P. | Trade Items
Related Party Transaction [Line Items]
Current payables to affiliates	$ 14.7	$ 19.4

X

- Definition

Amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership, due within 1 year (or 1 business cycle).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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- Definition

Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
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-Section 50
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