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)