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Long-Term Debt - Long-Term Debt (Detail) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Long-term debt |  |
Total debt | $ 765.5 | $ 788.6
Less current maturities | (2.4) | (2.4)
Total long-term debt | 763.1 | 786.2
VALHI, INC. | Contran Credit Facility |  |
Long-term debt |  |
Total debt | 268.4 | 270.7
Kronos Worldwide, Inc. | 3.75% Senior Secured Notes due September 15, 2025 | Kronos International, Inc |  |
Long-term debt |  |
Total debt | 465.0 | 485.7
BMI | Bank loan | Western Alliance Bank |  |
Long-term debt |  |
Total debt | 16.3 | 16.3
LandWell | Unsecured Debt | Western Alliance Bank |  |
Long-term debt |  |
Total debt | 14.2 | 14.2
Other Subsidiary | Other |  |
Long-term debt |  |
Total debt | 1.6 | 1.7
Subsidiary |  |
Long-term debt |  |
Total debt | $ 497.1 | $ 517.9

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