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Retirement Plans (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 29, 2024 | Oct. 01, 2023 | Oct. 02, 2022
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other pension and post-retirement expenses, net | Other pension and post-retirement expenses, net | Other pension and post-retirement expenses, net
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other pension and post-retirement expenses, net | Other pension and post-retirement expenses, net | Other pension and post-retirement expenses, net
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Amortization of actuarial losses and prior service cost reclassified to earnings | Amortization of actuarial losses and prior service cost reclassified to earnings | Amortization of actuarial losses and prior service cost reclassified to earnings
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible Enumeration] | Amortization of actuarial losses and prior service cost reclassified to earnings | Amortization of actuarial losses and prior service cost reclassified to earnings | Amortization of actuarial losses and prior service cost reclassified to earnings
Other pension and post-retirement expenses, net | $ 6,843 | $ 6,967 | $ 303
Qualified Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Interest cost | 15,791 | 16,068 | 12,506
Expected return on plan assets | (14,982) | (15,105) | (18,103)
Actuarial (gain) loss | 2,403 | 2,349 | 2,193
Net periodic benefit (credit) cost | 3,212 | 3,312 | (3,404)
SERP |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Interest cost | 3,188 | 3,149 | 2,173
Actuarial (gain) loss | 632 | 718 | 1,666
Amortization of unrecognized prior service cost | 14 | 19 | 19
Net periodic benefit (credit) cost | 3,834 | 3,886 | 3,858
Postretirement Health Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Interest cost | 711 | 700 | 489
Actuarial (gain) loss | (914) | (932) | (640)
Net periodic benefit (credit) cost | $ (203) | $ (232) | $ (151)

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