Business and geographic segments - Holding Percentage of Subsidiaries (Details)	Dec. 31, 2024
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%