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Noncontrolling interest in subsidiaries (Tables) | 6 Months Ended
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Jun. 30, 2025
Noncontrolling interest in subsidiaries |
Noncontrolling Interest in Net Assets of Subsidiaries | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | June 30,
​ |  | 2024 |  | 2025
​ |  | (In millions)
Noncontrolling interest in net assets: |  | ​ |  |  | ​ |
Kronos Worldwide | ​ | $ | 210.3 | ​ | $ | 215.9
NL Industries | ​ |  | 81.5 | ​ |  | 81.7
CompX International | ​ |  | 19.0 | ​ |  | 19.4
BMI | ​ |  | 18.7 | ​ |  | 22.0
LandWell | ​ |  | 13.5 | ​ |  | 19.5
Total | ​ | $ | 343.0 | ​ | $ | 358.5
Schedule of Noncontrolling interest in net income (loss) of subsidiaries | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Six months ended June 30,
​ |  | 2024 |  | 2025
​ | ​ | (In millions)
Noncontrolling interest in net income of subsidiaries: |  | ​ |  |  | ​ |
Kronos Worldwide | ​ | $ | 5.1 | ​ | $ | 1.6
NL Industries | ​ |  | 2.5 | ​ |  | .2
CompX International | ​ |  | 1.1 | ​ |  | 1.4
BMI | ​ |  | 2.7 | ​ |  | 3.3
LandWell | ​ |  | 4.2 | ​ |  | 6.0
Total | ​ | $ | 15.6 | ​ | $ | 12.5
​

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