Organization and basis of presentation - Additional Information (Detail) |
Mar. 31, 2026 |
|---|---|
| NL Industries | CompX International Inc | |
| Organization and basis of presentation: | |
| Percentage of ownership held by parent company | 87.00% |
| Valhi Inc | NL Industries | |
| Organization and basis of presentation: | |
| Percentage of ownership held by parent company | 83.00% |
| Contran Corporation | Valhi Inc | |
| Organization and basis of presentation: | |
| Percentage of ownership held by parent company | 91.00% |