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Noncontrolling Interest in Subsidiaries (Tables) | 6 Months Ended
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Jun. 30, 2019
Noncontrolling Interest [Abstract] |
Noncontrolling Interest in Net Assets of Subsidiaries |
| December 31, 2018 |  |  | June 30, 2019 |
| (In millions) |
Noncontrolling interest in net assets: |  |  |  |  |  |  |
Kronos Worldwide | $ | 221.4 |  |  | $ | 226.8 |
NL Industries |  | 62.4 |  |  |  | 66.2 |
CompX International |  | 19.4 |  |  |  | 22.0 |
BMI |  | 27.1 |  |  |  | 26.3 |
LandWell |  | 23.3 |  |  |  | 22.7 |
Total | $ | 353.6 |  |  | $ | 364.0 |
Schedule of Noncontrolling Interest in Net Income of Subsidiaries |
| Six months ended June 30, |
| 2018 |  |  | 2019 |
| (In millions) |
Noncontrolling interest in net income of subsidiaries: |  |  |  |  |  |  |
Kronos Worldwide | $ | 29.0 |  |  | $ | 11.6 |
NL Industries |  | (4.8 | ) |  |  | 3.6 |
CompX International |  | 1.1 |  |  |  | 1.2 |
BMI |  | .7 |  |  |  | 2.0 |
LandWell |  | 1.2 |  |  |  | 2.9 |
Total | $ | 27.2 |  |  | $ | 21.3 |

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