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Financial Instruments (Narrative) (Details)
6 Months Ended
Oct. 27, 2020
USD ($)
Nov. 07, 2017
USD ($)
Jun. 30, 2022
USD ($)
Jun. 16, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jun. 14, 2021
USD ($)
Nov. 28, 2017
USD ($)
Debt Instrument [Line Items]              
Current maturities of long-term debt     $ 0   $ 0    
Maximum leverage ratio allowed     3.50        
Minimum interest coverage ratio required     3.00        
Leverage ratio     1.43        
Interest coverage ratio     15.19        
Line of Credit              
Debt Instrument [Line Items]              
Line of credit facility, maximum borrowing capacity $ 700,000,000 $ 685,000,000          
Debt instrument, term 4 years 5 years          
Borrowings outstanding     $ 485,000,000        
Basis spread on variable rate     1.625%        
Line of credit facility, remaining borrowing capacity     $ 215,000,000        
Line of Credit | Interest Rate Swap              
Debt Instrument [Line Items]              
Derivative, notional amount       $ 350,000,000   $ 350,000,000 $ 350,000,000
Derivative, fixed interest rate           0.838% 2.11%
LIBOR rate       3.735%      
Line of Credit | Interest Rate Swap | London Interbank Offered Rate (LIBOR)              
Debt Instrument [Line Items]              
Derivative, basis spread on variable rate       1.51%      
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%