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Postretirement and Postemployment Benefits - Amounts Recognized in Accumulated Other Comprehensive Income (Loss) (Details) - Other Postretirement Benefits Plan - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2025	Sep. 29, 2024
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Unrecognized net actuarial gain	$ 13,872	$ 15,548
Unrecognized prior service benefit	1,722	2,008
Amounts recognized in accumulated other comprehensive income (loss)	$ 15,594	$ 17,556

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Amount, before tax, after reclassification adjustment, of increase (decrease) in accumulated other comprehensive income from gain (loss) of defined benefit plan.

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