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Financial Instruments - Effects of Derivative Instruments on Statements of Income (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 27, 2021
Mar. 28, 2020
Commodity Contracts [Member] | Cost of Goods Sold [Member] | Not Designated as Hedging Instrument [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Loss on commodity contracts (nonqualifying) $ (8,530) $ (9,476)