Retirement Plans (Reconciliation of Changes in Benefit Obligations, Plan Assets and Funded Status of Retirement Plans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 01, 2023	Oct. 02, 2022	Oct. 03, 2021
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	$ 303,951
Fair value at end of year	275,143	$ 303,951
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Net actuarial loss (gain)	(823)	(24,249)	$ (44,134)
Total recognized in OCI	(2,977)	(27,487)	(49,065)
Qualified Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Obligation at beginning of year	293,342	410,053
Interest cost	16,068	12,506	12,558
Participant contributions	0	0
Actuarial gain	(13,792)	(114,999)
Benefits paid	(14,884)	(14,218)
Settlements and other	(14,389)	0
Obligation at end of year	266,345	293,342	410,053
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	303,951	409,708
Actual return (loss) on plan assets	465	(91,539)
Participant contributions	0	0
Employer contributions	0	0
Benefits paid	(14,884)	(14,218)
Settlements and other	(14,389)	0
Fair value at end of year	275,143	303,951	409,708
Funded (unfunded) status at end of year	8,798	10,609
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Noncurrent assets	8,798	10,609
Current liabilities	0	0
Noncurrent liabilities	0	0
Total asset (liability) recognized	8,798	10,609
Unamortized actuarial loss (gain), net	99,871	101,372
Unamortized prior service cost	0	0
Total	99,871	101,372
Net actuarial loss (gain)	848	(5,357)
Amortization of actuarial (loss) gain	(2,349)	(2,193)
Amortization of prior service cost	0	0
Total recognized in OCI	(1,501)	(7,550)
Net periodic benefit (credit) cost	3,312	(3,404)	(3,272)
Total recognized in comprehensive income	1,811	(10,954)
Net actuarial loss (gain)	2,403
Prior service cost	0
Total	2,403
SERP
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Obligation at beginning of year	56,891	75,225
Interest cost	3,149	2,173	2,169
Participant contributions	0	0
Actuarial gain	(1,287)	(14,830)
Benefits paid	(5,240)	(5,677)
Settlements and other	0	0
Obligation at end of year	53,513	56,891	75,225
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	0	0
Actual return (loss) on plan assets	0	0
Participant contributions	0	0
Employer contributions	5,240	5,677
Benefits paid	(5,240)	(5,677)
Settlements and other	0	0
Fair value at end of year	0	0	0
Funded (unfunded) status at end of year	(53,513)	(56,891)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Noncurrent assets	0	0
Current liabilities	(5,138)	(5,213)
Noncurrent liabilities	(48,375)	(51,678)
Total asset (liability) recognized	(53,513)	(56,891)
Unamortized actuarial loss (gain), net	13,974	15,979
Unamortized prior service cost	15	34
Total	13,989	16,013
Net actuarial loss (gain)	(1,287)	(14,830)
Amortization of actuarial (loss) gain	(718)	(1,666)
Amortization of prior service cost	(19)	(19)
Total recognized in OCI	(2,024)	(16,515)
Net periodic benefit (credit) cost	3,886	3,858	3,931
Total recognized in comprehensive income	1,862	(12,657)
Net actuarial loss (gain)	632
Prior service cost	14
Total	646
Postretirement Health Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Obligation at beginning of year	12,577	17,162
Interest cost	700	489	563
Participant contributions	101	92
Actuarial gain	(383)	(4,062)
Benefits paid	(1,145)	(1,204)
Settlements and other	41	100
Obligation at end of year	11,891	12,577	17,162
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value at beginning of year	0	0
Actual return (loss) on plan assets	0	0
Participant contributions	101	92
Employer contributions	1,002	1,012
Benefits paid	(1,145)	(1,204)
Settlements and other	42	100
Fair value at end of year	0	0	0
Funded (unfunded) status at end of year	(11,891)	(12,577)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Noncurrent assets	0	0
Current liabilities	(1,072)	(1,081)
Noncurrent liabilities	(10,819)	(11,496)
Total asset (liability) recognized	(11,891)	(12,577)
Unamortized actuarial loss (gain), net	(10,232)	(10,781)
Unamortized prior service cost	0	0
Total	(10,232)	(10,781)
Net actuarial loss (gain)	(383)	(4,062)
Amortization of actuarial (loss) gain	932	640
Amortization of prior service cost	0	0
Total recognized in OCI	549	(3,422)
Net periodic benefit (credit) cost	(232)	(151)	$ 222
Total recognized in comprehensive income	317	$ (3,573)
Net actuarial loss (gain)	(914)
Prior service cost	0
Total	$ (914)