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Long-Term Debt - Long-Term Debt (Detail) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Long-term debt |  |
Total debt | $ 789.2 | $ 800.4
Less current maturities | 2.9 | 2.9
Total long-term debt | 786.3 | 797.5
VALHI, INC. | Contran Credit Facility |  |
Long-term debt |  |
Total debt | 313.0 | 314.3
Kronos Worldwide, Inc. | 3.75% Senior Secured Notes due September 15, 2025 | Kronos International, Inc |  |
Long-term debt |  |
Total debt | 443.2 | 452.4
Tremont | Promissory Note |  |
Long-term debt |  |
Total debt | 8.7 | 9.4
BMI | Bank loan | Western Alliance Bank |  |
Long-term debt |  |
Total debt | 18.0 | 18.0
LandWell | Unsecured Debt |  |
Long-term debt |  |
Total debt | 2.1 | 2.1
Other Subsidiary | Other |  |
Long-term debt |  |
Total debt | 4.2 | 4.2
Subsidiary |  |
Long-term debt |  |
Total debt | $ 476.2 | $ 486.1

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