Business and geographic segments - Holding Percentage of Subsidiaries (Details) |
Dec. 31, 2025 |
|---|---|
| Chemicals | |
| Business and geographic segments | |
| Controlling interest in subsidiary | 81.00% |
| Component products | |
| Business and geographic segments | |
| Controlling interest in subsidiary | 87.00% |
| Real estate management and development | Basic Management Inc | |
| Business and geographic segments | |
| Controlling interest in subsidiary | 63.00% |
| Real estate management and development | LandWell | Aggregate General And Limited Interests | |
| Business and geographic segments | |
| Controlling interest in subsidiary | 77.00% |