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Defined Benefit Pension Plans - Amounts Recognized in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 25, 2022 | Sep. 26, 2021
Defined Benefit Plan Disclosure [Line Items] |  |
Unrecognized net actuarial gain (loss) | $ 10,893 | $ 36,965
Pension Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Unrecognized prior service cost | (5,441) | 0
Amounts recognized in accumulated other comprehensive income (loss) | $ 5,452 | $ 36,965

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