v3.25.4
Commitments and contingencies - Other Litigation and Other Matters - Additional Information (Details)
12 Months Ended
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Component Products Segment | Customer Concentration Risk [Member] | Top Ten Customers | Revenue Benchmark [Member]      
Commitments and contingencies      
Concentration risk percentage 52.00% 47.00% 52.00%
Number of customers 10 10 10
Component Products [Member] | Customer Concentration Risk [Member] | One customer | Revenue Benchmark [Member] | Security Products Reporting Unit      
Commitments and contingencies      
Concentration risk percentage 26.00% 21.00% 24.00%
Number of customers 1 1 1
Component Products [Member] | Customer Concentration Risk [Member] | One customer | Revenue Benchmark [Member] | Security Products Reporting Unit | Pilot project      
Commitments and contingencies      
Concentration risk percentage     11.00%
TiO2 | Chemicals      
Commitments and contingencies      
Number of customers 3,000    
TiO2 | Chemicals | Product Concentration Risk [Member] | Revenue Benchmark [Member]      
Commitments and contingencies      
Concentration risk percentage 90.00% 90.00% 90.00%
TiO2 | Chemicals | Customer Concentration Risk [Member] | Revenue Benchmark [Member]      
Commitments and contingencies      
Concentration risk percentage 10.00%    
TiO2 | Chemicals | Customer Concentration Risk [Member] | Top Ten Customers | Revenue Benchmark [Member]      
Commitments and contingencies      
Concentration risk percentage 35.00% 39.00% 35.00%
Number of customers 10 10 10
TiO2 | Chemicals | Customer Concentration Risk [Member] | One customer | Revenue Benchmark [Member]      
Commitments and contingencies      
Concentration risk percentage   10.00% 12.00%
Number of customers   1 1
TiO2 | Chemicals | Geographic Concentration Risk [Member] | Europe [Member] | Revenue Benchmark [Member]      
Commitments and contingencies      
Concentration risk percentage 45.00% 44.00% 44.00%
TiO2 | Chemicals | Geographic Concentration Risk [Member] | North America [Member] | Revenue Benchmark [Member]      
Commitments and contingencies      
Concentration risk percentage 40.00% 40.00% 41.00%
Other Supply And Service Contracts | Chemicals      
Commitments and contingencies      
Minimum purchase commitments $ 133,000,000    
2026 $ 108,000,000    
Land Sales [Member] | Real Estate Management And Development [Member] | Customer Concentration Risk [Member] | One customer | Revenue Benchmark [Member]      
Commitments and contingencies      
Concentration risk percentage 10.00% 10.00% 10.00%
Land Sales [Member] | Real Estate Management And Development [Member] | Customer Concentration Risk [Member] | Second Customer | Revenue Benchmark [Member]      
Commitments and contingencies      
Concentration risk percentage 10.00% 10.00% 10.00%
Land Sales [Member] | Real Estate Management And Development [Member] | Customer Concentration Risk [Member] | Three customer | Revenue Benchmark [Member]      
Commitments and contingencies      
Number of customers 3 3  
Land Sales [Member] | Real Estate Management And Development [Member] | Customer Concentration Risk [Member] | Third Customer | Revenue Benchmark [Member]      
Commitments and contingencies      
Concentration risk percentage 10.00% 10.00% 10.00%
Land Sales [Member] | Real Estate Management And Development [Member] | Customer Concentration Risk [Member] | Four customer | Revenue Benchmark [Member]      
Commitments and contingencies      
Concentration risk percentage     10.00%
Land Sales [Member] | Real Estate Management And Development [Member] | Customer Concentration Risk [Member] | Five customer | Revenue Benchmark [Member]      
Commitments and contingencies      
Concentration risk percentage     10.00%
Number of customers     5