v3.26.1
Senior Secured Credit Facilities Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Feb. 03, 2026
Dec. 31, 2025
Debt Instrument [Line Items]            
Payments of Debt Issuance Costs     $ 71.9 $ 11.6    
Debt refinancing and redemption costs $ 0.9 $ 0.0 3.9 3.3    
Second Amendment            
Debt Instrument [Line Items]            
Line of Credit Facility, Maximum Borrowing Capacity   925.0   925.0    
Second Amendment | Dowlais Group plc            
Debt Instrument [Line Items]            
Line of Credit Facility, Maximum Borrowing Capacity         $ 1,495.0  
Tranche C Term Facility            
Debt Instrument [Line Items]            
Secured Debt 824.6   824.6   835.0 $ 0.0
Tranche C Term Facility | Dowlais Group plc            
Debt Instrument [Line Items]            
Secured Debt   $ 843.0   843.0 $ 835.0  
Secured Debt [Member] | Second Amendment            
Debt Instrument [Line Items]            
Payments of Debt Issuance Costs       11.6    
Debt refinancing and redemption costs       $ 3.3    
Secured Debt [Member] | Term Loan A Facility, Term Loan B Facility & Tranche C Term Facility            
Debt Instrument [Line Items]            
Repayments of Secured Debt     25.7      
Multi Currency Credit Facility [Member]            
Debt Instrument [Line Items]            
Line of Credit Facility, Current Borrowing Capacity 1,469.7   1,469.7      
Letters of Credit Outstanding, Amount $ 25.3   $ 25.3