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Summary of Significant Accounting Policies (Summary of Significant Accounting Policies) (Details) - Revolving Credit Agreement [Member] - USD ($)
$ in Millions
Mar. 30, 2020
Mar. 28, 2020
Dec. 28, 2019
Debt Instrument [Line Items]      
Line of Credit Facility, Amount Outstanding [1]   $ 388.1 $ 272.0
Subsequent Event [Member]      
Debt Instrument [Line Items]      
Credit Facility Draw Down $ 225.0    
Credit Facility Draw down as preventive measure for COVID-19 $ 175.0    
[1]
(a) 
$245.1 million and $174.9 million denominated in Euro as of March 28, 2020 and December 28, 2019, respectively.