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Noncontrolling Interest in Subsidiaries (Tables) | 3 Months Ended
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Mar. 31, 2016
Noncontrolling Interest [Abstract] |
Noncontrolling Interest in Net Assets of Subsidiaries |
| December 31, 2015 |  |  | March 31, 2016 |
| (In millions) |
Noncontrolling interest in net assets: |  |  |  |  |  |  |
Kronos Worldwide | $ | 147.9 |  |  | $ | 146.5 |
NL Industries |  | 39.5 |  |  |  | 39.4 |
CompX International |  | 15.3 |  |  |  | 15.5 |
BMI |  | 31.6 |  |  |  | 30.2 |
LandWell |  | 23.9 |  |  |  | 23.6 |
Total | $ | 258.2 |  |  | $ | 255.2 |
Schedule of Noncontrolling Interest in Net Income (Loss) of Subsidiaries |
| Three months ended March 31, |
| 2015 |  |  | 2016 |
| (In millions) |
Noncontrolling interest in net income (loss) of subsidiaries: |  |  |  |  |  |  |
Kronos Worldwide | $ | 3.6 |  |  | $ | (.8 | )
NL Industries |  | 1.7 |  |  |  | (.4 | )
CompX International |  | .3 |  |  |  | .3 |
BMI |  | — |  |  |  | (1.4 | )
LandWell |  | (.2 | ) |  |  | (.2 | )
Total | $ | 5.4 |  |  | $ | (2.5 | )

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