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Postretirement and Postemployment Benefits - Amounts Recognized in the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands | Sep. 24, 2023 | Sep. 25, 2022
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Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Accumulated other comprehensive income (before income tax benefit) | $ (16,653) | $ (5,005)
Other Postretirement Benefits Plan |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Non-current assets | 21,565 | 19,066
Postretirement benefit obligations | (7,008) | (7,450)
Accumulated other comprehensive income (before income tax benefit) | $ 19,043 | $ 17,327

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