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Financial Instruments - Effects of Derivative Instruments on Statements of Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 25, 2021 | Sep. 26, 2020 | Sep. 25, 2021 | Sep. 26, 2020
Commodity Contracts | Cost of goods sold | Not Designated as Hedging Instrument |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (loss) on commodity contracts (nonqualifying) | $ 7,282 | $ 843 | $ (3,141) | $ (3,596)

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