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Noncontrolling Interest in Subsidiaries (Tables) | 6 Months Ended
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Jun. 30, 2021
Noncontrolling Interest [Abstract] |
Noncontrolling Interest in Net Assets of Subsidiaries |
| December 31, |  |  | June 30, |
| 2020 |  |  | 2021 |
| (In millions) |
Noncontrolling interest in net assets: |  |  |  |  |  |  |
Kronos Worldwide | $ | 212.3 |  |  | $ | 215.2 |
NL Industries |  | 67.1 |  |  |  | 71.2 |
CompX International |  | 23.5 |  |  |  | 22.3 |
BMI |  | 14.7 |  |  |  | 11.6 |
LandWell |  | 6.8 |  |  |  | 2.4 |
Total | $ | 324.4 |  |  | $ | 322.7 |
Schedule of Noncontrolling Interest in Net Income of Subsidiaries |
| Six months ended June 30, |
| 2020 |  |  | 2021 |
| (In millions) |
Noncontrolling interest in net income of subsidiaries: |  |  |  |  |  |  |
Kronos Worldwide | $ | 8.7 |  |  | $ | 8.8 |
NL Industries |  | 1.1 |  |  |  | 4.4 |
CompX International |  | .9 |  |  |  | 1.2 |
BMI |  | 3.0 |  |  |  | 1.6 |
LandWell |  | 4.7 |  |  |  | 2.6 |
Total | $ | 18.4 |  |  | $ | 18.6 |

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