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Derivative Financial Instruments (Narrative) (Details) - Foreign currency forward contracts
$ in Millions
6 Months Ended
Jun. 27, 2021
USD ($)
derivative_instrument
Jun. 28, 2020
Derivatives not designated as hedging instruments    
Derivative [Line Items]    
Approximate number of derivatives per quarter | derivative_instrument 10  
Notional amount | $ $ 2.0  
Cash Flow Hedges    
Derivative [Line Items]    
Approximate number of derivatives per quarter | derivative_instrument 10  
Notional amount | $ $ 6.0  
Estimated term of reclassification from OCI to Income 12 months 12 months
Maximum    
Derivative [Line Items]    
Term of derivative contracts 6 months  
Maximum | Derivatives not designated as hedging instruments    
Derivative [Line Items]    
Term of derivative contracts 3 months  
Maximum | Cash Flow Hedges    
Derivative [Line Items]    
Term of derivative contracts 6 months