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Noncontrolling Interest in Subsidiaries (Tables) | 3 Months Ended
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Mar. 31, 2019
Noncontrolling Interest [Abstract] |
Noncontrolling Interest in Net Assets of Subsidiaries |
| December 31, 2018 |  |  | March 31, 2019 |
| (In millions) |
Noncontrolling interest in net assets: |  |  |  |  |  |  |
Kronos Worldwide | $ | 221.4 |  |  | $ | 223.5 |
NL Industries |  | 62.4 |  |  |  | 65.1 |
CompX International |  | 19.4 |  |  |  | 19.9 |
BMI |  | 27.1 |  |  |  | 26.7 |
LandWell |  | 23.3 |  |  |  | 22.8 |
Total | $ | 353.6 |  |  | $ | 358.0 |
Schedule of Noncontrolling Interest in Net Income of Subsidiaries |
| Three months ended March 31, |
| 2018 |  |  | 2019 |
| (In millions) |
Noncontrolling interest in net income of subsidiaries: |  |  |  |  |  |  |
Kronos Worldwide | $ | 13.8 |  |  | $ | 5.9 |
NL Industries |  | 2.4 |  |  |  | 2.6 |
CompX International |  | .5 |  |  |  | .5 |
BMI |  | .6 |  |  |  | .5 |
LandWell |  | 1.2 |  |  |  | .7 |
Total | $ | 18.5 |  |  | $ | 10.2 |

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