v3.26.3
Contingencies & Employee Benefits - Summary of Movement in Contingencies (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Pension retirement obligations    
Of which current $ 0.3 $ 0.2
Of which non-current 1.5 $ 1.5
Total    
Defined benefit plan, benefit obligation and loss contingency accrual, beginning balance 1.7  
Increases in liabilities 0.2  
Actuarial gains and losses on defined-benefit plans (0.1)  
Defined benefit plan, benefit obligation and loss contingency accrual, ending balance 1.9  
Of which current 0.3  
Of which non-current 1.5  
Other contingencies    
Other contingencies    
Contingencies, beginning balance 0.2  
Increases in liabilities 0.1  
Contingencies, ending balance 0.3  
Of which current 0.3  
Of which non-current 0.0  
Pension retirement obligations    
Pension retirement obligations    
Pension retirement obligations, beginning balance 1.5  
Increases in liabilities 0.1  
Actuarial gains and losses on defined-benefit plans (0.1)  
Pension retirement obligations, ending balance 1.5  
Of which current 0.0  
Of which non-current $ 1.5