v3.26.3
Derivatives and Fair Value Measurements - Long-term debt (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt and Lease Obligation, Net $ 296.6 $ 336.4
Carrying amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total debt at par value 306.1 340.8
Convertible Notes Payable, Current 13.5 0.0
Debt Instrument, Convertible, Debt Discount Amount (16.3) 0.0
Unamortized Debt Issuance Costs Excluding Notes Scheduled for Redemption (6.7) (4.4)
Debt and Lease Obligation, Net 296.6 336.4
Estimated fair value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Estimated fair value $ 303.0 $ 557.8