v3.26.1
Debt (Exchangeable bonds) (Details) - 4.625% Senior Guaranteed Exchangeable Bonds due September 2029
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 30, 2026
Mar. 31, 2026
USD ($)
$ / shares
Mar. 30, 2028
Dec. 31, 2025
USD ($)
Debt        
Debt instrument interest rate stated percentage 4.625% 4.625%    
Bifurcated compound exchange feature, at estimated fair value   $ 279.0   $ 126.0
Effective interest rate (as a percent)   18.30%    
Fair value of debt   $ 522.0    
Debt conversion ratio   290.6618    
Debt conversion (in dollars per share) | $ / shares   $ 3.44    
Shares issuable (in shares)   75.3    
Plan        
Debt        
Debt instrument interest rate stated percentage     4.625%  
Amount to repurchase upon the occurrence of certain events (as a percent) 115      
Trading days for calculation of average stock price 20 days