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Defined Benefit Plan, Number Of Plans Frozen

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Maximum Percentage Of Equity Investment Redeemable

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Number Of Defined Benefit Plans

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Number Of Fully-Funded Defined Benefit Plans

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Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.

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Amount of (increase) decrease in benefit obligation of defined benefit plan from event reducing expected years of future service of present employees or eliminating accrual of benefits for some or all future services of present employees.

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Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year.

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Amount of increase (decrease) in benefit obligation of defined benefit plan from change, classified as other.

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Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan.

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Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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Amount of cost (reversal of cost) for pension and other postretirement benefits.

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Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent.

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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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Defined Benefit Pension Plans - Narrative (Details)		1 Months Ended	12 Months Ended
Defined Benefit Pension Plans - Narrative (Details)	Sep. 26, 2021 USD ($) plan	Sep. 25, 2022 USD ($) plan	Sep. 25, 2022 USD ($) plan	Sep. 26, 2021 USD ($) plan	Sep. 27, 2020
Defined Benefit Plan Disclosure [Line Items]
Number of defined benefit plans \| plan	7	2	2	7
Defined benefit plans, number of plans frozen \| plan	2		4
Defined benefit plan, number of frozen plans merged \| plan			6
Number of fully-funded defined benefit plans \| plan		1	1
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest
Defined Benefit Plan Disclosure [Line Items]
Decrease to accumulated other comprehensive income due to plan enhancements			$ 6,077,000
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Non-cash curtailment gain			1,027,000	$ 0
Increase to net pension liability due to plan enhancements			6,077,000	0
Decrease in plan liabilities due to purchase of annuities		$ 85,622,000
Increase in defined benefit plan assets		81,377,000	$ 81,377,000	$ 0
Settlement income charge		4,245,000
Assumptions used calculating net periodic benefit cost, expected long-term rate of return on plan assets			5.00%	5.90%	6.00%
Expected future employer contributions, next fiscal year		0	$ 0
Defined benefit plan accrued liability	$ 14,243,000	528,000	528,000	$ 14,243,000
Pension Plan \| U.S. Small Cap Value Equity Common/Collective Fund
Defined Benefit Plan Disclosure [Line Items]
Investment in equity securities measured at fair value, recognized in net income	7,236,000	2,235,000	2,235,000	7,236,000
Pension Plan \| Global Equity Long/Short Common/Collective Hedge Fund-of-funds
Defined Benefit Plan Disclosure [Line Items]
Investment in equity securities measured at fair value, recognized in net income	8,371,000	$ 16,663,000	$ 16,663,000	8,371,000
Maximum percentage of equity investment redeemable		0.90	0.90
Pension Plan \| Global Equity Long/Short Common/Collective Hedge Fund-of-funds \| Minimum
Defined Benefit Plan Disclosure [Line Items]
Notice for redemption of equity investment		90 days	90 days
Pension Plan \| Global Equity Long/Short Common/Collective Hedge Fund-of-funds \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Notice for redemption of equity investment		120 days	120 days
Pension Plan \| Global Equity Long/Short Common/Collective Hedge Fund-of-funds 2
Defined Benefit Plan Disclosure [Line Items]
Investment in equity securities measured at fair value, recognized in net income	10,387,000	$ 15,852,000	$ 15,852,000	10,387,000
Maximum percentage of equity investment redeemable		0.50	0.50
Other Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan accrued liability	$ 996,000	$ 967,000	$ 967,000	$ 996,000