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Noncontrolling interest in subsidiaries (Tables) | 12 Months Ended
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Dec. 31, 2024
Noncontrolling interest in subsidiaries |
Noncontrolling Interest in Net Assets of Subsidiaries | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2023 |  | 2024
​ |  | (In millions)
Noncontrolling interest in net assets: |  | ​ |  |  | ​ |
Kronos Worldwide | ​ | $ | 209.0 | ​ | $ | 210.3
NL Industries | ​ |  | 76.9 | ​ |  | 81.5
CompX International | ​ |  | 22.0 | ​ |  | 19.0
BMI | ​ |  | 11.0 | ​ |  | 18.7
LandWell | ​ |  | 6.8 | ​ |  | 13.5
Total | ​ | $ | 325.7 | ​ | $ | 343.0
Schedule of Noncontrolling interest in net income (loss) of subsidiaries | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years ended December 31,
​ |  | 2022 |  | 2023 |  | 2024
​ | ​ | (In millions)
Noncontrolling interest in net income (loss) of subsidiaries: |  | ​ |  |  | ​ |  |  | ​ |
Kronos Worldwide | ​ | $ | 20.0 | ​ | $ | (9.5) | ​ | $ | 16.1
NL Industries | ​ |  | 5.8 | ​ |  | (.4) | ​ |  | 11.4
CompX International | ​ |  | 2.6 | ​ |  | 2.9 | ​ |  | 2.0
BMI | ​ |  | 2.8 | ​ |  | 8.2 | ​ |  | 9.6
LandWell | ​ |  | 14.7 | ​ |  | 13.8 | ​ |  | 14.2
Total | ​ | $ | 45.9 | ​ | $ | 15.0 | ​ | $ | 53.3
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