v3.25.2
Long-term debt - Senior Notes (Details)
€ in Thousands, $ in Millions
3 Months Ended
Mar. 31, 2024
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2025
EUR (€)
Mar. 31, 2025
Dec. 31, 2024
USD ($)
Long-term debt          
Revolving credit facility   $ 37.0     $ 10.0
3.75% Senior Secured Notes due 2025          
Long-term debt          
Debt instrument interest rate   3.75% 3.75% 3.75% 3.75%
Debt instrument principal amount | €     € 75,000    
9.50% Senior Secured Notes due 2029          
Long-term debt          
Debt instrument interest rate   9.50% 9.50% 9.50% 9.50%
Kronos International, Inc | 3.75% Senior Secured Notes due 2025          
Long-term debt          
Debt instrument interest rate   3.75% 3.75%   3.75%
Debt instrument principal amount | €     € 75,000    
Principal amount outstanding   $ 87.9     $ 78.3
Kronos International, Inc | 9.50% Senior Secured Notes due 2029          
Long-term debt          
Debt instrument interest rate   9.50% 9.50%   9.50%
Debt instrument principal amount | €     € 351,174    
Principal amount outstanding   $ 410.7     $ 365.4
Unamortized premium   5.2      
Debt issuance costs   $ 6.2      
Interest expense $ 1.5