v3.26.1
Business segment information - Additional Information (Details)
6 Months Ended
Jun. 30, 2026
Business segment information  
Number Of Reportable Segments Not Disclosed [Flag] true
Number of reportable segment not disclosed true
Kronos | Valhi Incorporation  
Business segment information  
Direct ownership percentage by parent 50.00%
Kronos | NLI Holdings  
Business segment information  
Indirect controlling interest in subsidiary 31.00%
NLI Holdings | Valhi Incorporation  
Business segment information  
Direct ownership percentage by parent 83.00%
LandWell | Valhi Incorporation  
Business segment information  
Direct ownership percentage by parent 27.00%
LandWell | Basic Management Inc  
Business segment information  
Indirect controlling interest in subsidiary 50.00%
Basic Management Inc | Valhi Incorporation  
Business segment information  
Direct ownership percentage by parent 63.00%