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Long-Term Debt - Long-Term Debt (Detail) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Long-term debt
Total debt	$ 745.2	$ 788.6
Less current maturities	(2.5)	(2.4)
Total long-term debt	742.7	786.2
VALHI, INC. | Contran Credit Facility
Long-term debt
Total debt	242.7	270.7
Kronos Worldwide, Inc. | 3.75% Senior Secured Notes due September 15, 2025 | Kronos International, Inc
Long-term debt
Total debt	471.8	485.7
BMI | Bank loan | Western Alliance Bank
Long-term debt
Total debt	15.3	16.3
LandWell | Unsecured Debt | Western Alliance Bank
Long-term debt
Total debt	13.9	14.2
Other Subsidiary | Other
Long-term debt
Total debt	1.5	1.7
Subsidiary
Long-term debt
Total debt	$ 502.5	$ 517.9

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Amount of long-term debt and lease obligation, classified as noncurrent.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
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