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Retirement Plans (Reconciliation of Changes in Benefit Obligations, Plan Assets and Funded Status of Retirement Plans) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 29, 2024 | Oct. 01, 2023 | Oct. 02, 2022
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Fair value at beginning of year | $ 275,143 |  |
Fair value at end of year | 302,439 | $ 275,143 |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |  |
Net actuarial loss (gain) | 9,856 | (823) | $ (24,249)
Total recognized in OCI | 7,721 | (2,977) | (27,487)
Qualified Plan |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Obligation at beginning of year | 266,345 | 293,342 |
Interest cost | 15,791 | 16,068 | 12,506
Participant contributions | 0 | 0 |
Actuarial loss (gain) | 29,769 | (13,792) |
Benefits paid | (13,985) | (14,884) |
Settlements and other | 0 | (14,389) |
Obligation at end of year | 297,920 | 266,345 | 293,342
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Fair value at beginning of year | 275,143 | 303,951 |
Actual return on plan assets | 41,281 | 465 |
Participant contributions | 0 | 0 |
Employer contributions | 0 | 0 |
Benefits paid | (13,985) | (14,884) |
Settlements and other | 0 | (14,389) |
Fair value at end of year | 302,439 | 275,143 | 303,951
Funded (unfunded) status at end of year | 4,519 | 8,798 |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |  |
Noncurrent assets | 4,519 | 8,798 |
Current liabilities | 0 | 0 |
Noncurrent liabilities | 0 | 0 |
Total asset (liability) recognized | 4,519 | 8,798 |
Unamortized actuarial loss (gain), net | 100,938 | 99,871 |
Unamortized prior service cost | 0 | 0 |
Total | 100,938 | 99,871 |
Net actuarial loss (gain) | 3,470 | 848 |
Amortization of actuarial (loss) gain | (2,403) | (2,349) |
Amortization of prior service cost | 0 | 0 |
Total recognized in OCI | 1,067 | (1,501) |
Net periodic benefit (credit) cost | 3,212 | 3,312 | (3,404)
Total recognized in comprehensive income | 4,279 | 1,811 |
Net actuarial loss (gain) | 2,416 |  |
SERP |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Obligation at beginning of year | 53,513 | 56,891 |
Interest cost | 3,188 | 3,149 | 2,173
Participant contributions | 0 | 0 |
Actuarial loss (gain) | 5,199 | (1,287) |
Benefits paid | (4,803) | (5,240) |
Settlements and other | 0 | 0 |
Obligation at end of year | 57,097 | 53,513 | 56,891
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Fair value at beginning of year | 0 | 0 |
Actual return on plan assets | 0 | 0 |
Participant contributions | 0 | 0 |
Employer contributions | 4,803 | 5,240 |
Benefits paid | (4,803) | (5,240) |
Settlements and other | 0 | 0 |
Fair value at end of year | 0 | 0 | 0
Funded (unfunded) status at end of year | (57,097) | (53,513) |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |  |
Noncurrent assets | 0 | 0 |
Current liabilities | (5,124) | (5,138) |
Noncurrent liabilities | (51,973) | (48,375) |
Total asset (liability) recognized | (57,097) | (53,513) |
Unamortized actuarial loss (gain), net | 18,542 | 13,974 |
Unamortized prior service cost | 0 | 15 |
Total | 18,542 | 13,989 |
Net actuarial loss (gain) | 5,199 | (1,287) |
Amortization of actuarial (loss) gain | (632) | (718) |
Amortization of prior service cost | (14) | (19) |
Total recognized in OCI | 4,553 | (2,024) |
Net periodic benefit (credit) cost | 3,834 | 3,886 | 3,858
Total recognized in comprehensive income | 8,387 | 1,862 |
Net actuarial loss (gain) | 990 |  |
Postretirement Health Plans |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Obligation at beginning of year | 11,891 | 12,577 |
Interest cost | 711 | 700 | 489
Participant contributions | 102 | 101 |
Actuarial loss (gain) | 1,186 | (383) |
Benefits paid | (1,268) | (1,145) |
Settlements and other | 32 | 41 |
Obligation at end of year | 12,654 | 11,891 | 12,577
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Fair value at beginning of year | 0 | 0 |
Actual return on plan assets | 0 | 0 |
Participant contributions | 102 | 101 |
Employer contributions | 1,134 | 1,002 |
Benefits paid | (1,268) | (1,145) |
Settlements and other | 32 | 42 |
Fair value at end of year | 0 | 0 | 0
Funded (unfunded) status at end of year | (12,654) | (11,891) |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |  |
Noncurrent assets | 0 | 0 |
Current liabilities | (1,111) | (1,072) |
Noncurrent liabilities | (11,543) | (10,819) |
Total asset (liability) recognized | (12,654) | (11,891) |
Unamortized actuarial loss (gain), net | (8,132) | (10,232) |
Unamortized prior service cost | 0 | 0 |
Total | (8,132) | (10,232) |
Net actuarial loss (gain) | 1,186 | (383) |
Amortization of actuarial (loss) gain | 914 | 932 |
Amortization of prior service cost | 0 | 0 |
Total recognized in OCI | 2,100 | 549 |
Net periodic benefit (credit) cost | (203) | (232) | $ (151)
Total recognized in comprehensive income | 1,897 | $ 317 |
Net actuarial loss (gain) | $ (778) |  |

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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (j) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (k) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 60 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480266/715-60-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(6) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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