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Financial Instruments (Narrative) (Details)
$ in Millions
3 Months Ended
Oct. 27, 2020
USD ($)
Apr. 08, 2016
USD ($)
Mar. 31, 2021
USD ($)
Mar. 16, 2020
USD ($)
Nov. 28, 2017
USD ($)
Nov. 27, 2017
USD ($)
Debt Instrument [Line Items]            
Minimum interest coverage ratio required     3.00      
Leverage ratio     1.20      
Interest coverage ratio     15.72      
Maximum leverage ratio allowed     3.50      
Line of Credit            
Debt Instrument [Line Items]            
Line of credit facility, maximum borrowing capacity $ 700.0 $ 685.0        
Debt instrument, term 4 years 5 years        
Borrowings outstanding     $ 384.0      
Basis spread on variable rate     1.625%      
Line of credit facility, remaining borrowing capacity     $ 316.0      
Line of Credit | Interest Rate Swap            
Debt Instrument [Line Items]            
Revolving credit borrowings           $ 300.0
Amount received from terminate agreement           $ 6.3
Derivative, fixed interest rate       11.00% 2.11%  
Derivative, notional amount       $ 350.0 $ 350.0  
LIBOR rate       3.735%    
Line of Credit | Minimum            
Debt Instrument [Line Items]            
Basis spread on variable rate     1.50%      
Line of Credit | Maximum            
Debt Instrument [Line Items]            
Basis spread on variable rate     2.00%