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Financial Instruments - Effect of Derivative Instruments on Statements of Income (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 25, 2022
Dec. 26, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Unrealized holding gains arising during period $ 9.6 $ 7.2 $ 0.5
Less: reclassification adjustment for gains included in net income (10.2) (4.5) (2.9)
Unrealized (losses) gains on derivatives (0.6) 2.7 (2.4)
Foreign Exchange Contract      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Unrealized holding gains arising during period 9.6 7.2 0.5
Less: reclassification adjustment for gains included in net income (10.2) (4.5) (2.9)
Unrealized (losses) gains on derivatives (0.6) 2.7 (2.4)
Foreign Exchange Contract | Fair Value Hedging      
Derivative Instruments and Hedging Activities Disclosures [Line Items]      
Hedged items (1.3) 0.0 0.0
Derivatives designated as hedging instruments 5.9 (7.2) (0.5)
Net gains (losses) recognized in earnings $ 4.6 $ (7.2) $ (0.5)