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Noncontrolling Interest in Subsidiaries (Tables) | 9 Months Ended
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Sep. 30, 2016
Noncontrolling Interest [Abstract] |
Noncontrolling Interest in Net Assets of Subsidiaries |
| December 31, 2015 |  |  | September 30, 2016 |
| (In millions) |
Noncontrolling interest in net assets: |  |  |  |  |  |  |
Kronos Worldwide | $ | 147.9 |  |  | $ | 146.4 |
NL Industries |  | 39.5 |  |  |  | 43.0 |
CompX International |  | 15.3 |  |  |  | 16.1 |
BMI |  | 31.6 |  |  |  | 30.3 |
LandWell |  | 23.9 |  |  |  | 23.6 |
Total | $ | 258.2 |  |  | $ | 259.4 |
Schedule of Noncontrolling Interest in Net Income (Loss) of Subsidiaries |
| Nine months ended September 30, |
| 2015 |  |  | 2016 |
| (In millions) |
Noncontrolling interest in net income (loss) of subsidiaries: |  |  |  |  |  |  |
Kronos Worldwide | $ | (30.2 | ) |  | $ | 3.8 |
NL Industries |  | (3.1 | ) |  |  | 1.0 |
CompX International |  | 1.0 |  |  |  | 1.0 |
BMI |  | .4 |  |  |  | (1.2 | )
LandWell |  | .2 |  |  |  | (.3 | )
Total | $ | (31.7 | ) |  | $ | 4.3 |

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