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Guarantees (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 27, 2024
Dec. 29, 2023
Oct. 12, 2020
Others      
Guarantor Obligations [Line Items]      
Maximum future payments $ 29.4    
Asset Pledged as Collateral [Member]      
Guarantor Obligations [Line Items]      
Restricted Cash $ 41.8    
Mallinckrodt Baker | Indemnification Agreement      
Guarantor Obligations [Line Items]      
Escrow     $ 30.0
Guarantor Obligation, Term 17 years    
Mallinckrodt Baker | Indemnification Agreement | Other Assets      
Guarantor Obligations [Line Items]      
Escrow $ 21.3 $ 20.2