Derivative Instruments and Hedging Activities (Company's Derivative Positions and Their Impact on Financial Position) (Details) - Significant Other Observable Inputs (Level 2) - Designated as Hedging Instrument - Foreign exchange contracts - USD ($) $ in Millions	Jun. 26, 2021	Dec. 26, 2020
Non-Trade Amounts Receivable
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 8.3	$ 4.3
Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability	$ (8.0)	$ (4.4)