Maximum Percentage Of Equity Investment Redeemable

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- Definition

Notice For Redemption of Equity Investment

+ References

No definition available.

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- Definition

Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans.

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- Definition

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.

+ References

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- Definition

Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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- Definition

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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- Definition

Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position.

+ References

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- Definition

Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.

+ References

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- Definition

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

+ References

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- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit from event reducing expected years of future service of present employees or eliminating accrual of defined benefits for some or all future services of present employees.

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- Definition

Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan, for assets transferred into (out of) Level 3 of fair value hierarchy. Includes, but is not limited to, transfer due to change in observability of significant inputs.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

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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Postretirement and Postemployment Benefits - Narrative (Details)	12 Months Ended
	Sep. 25, 2022 USD ($)	Sep. 26, 2021 USD ($)	Sep. 27, 2020 USD ($)
Other Postretirement Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net actuarial gain expected to be recognized in net periodic pension cost during next fiscal year	$ 1,014,000
Amortization of prior service cost (credit) expected to be recognized during the next fiscal year	$ 647,000
Assumptions used calculating net periodic benefit cost, expected long-term rate of return on plan assets	5.00%	4.00%	4.50%
Liability (gain)/loss due to curtailment	$ 0	$ (23,830,000)
Non-current assets	19,066,000	17,664,000
Expected future employer contributions, next fiscal year	0
Postemployment benefit obligation	12,287,000	18,538,000	$ 47,637,000
Other Postretirement Benefits Plan \| U.S. Small Cap Value Equity Common/Collective Fund
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Investment in equity securities measured at fair value, recognized in net income	791,000	904,000
Other Postretirement Benefits Plan \| Global Equity Long/Short Common/Collective Hedge Fund-of-funds
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Investment in equity securities measured at fair value, recognized in net income	$ 2,782,000	3,235,000
Maximum percentage of equity investment redeemable	0.90
Other Postretirement Benefits Plan \| Global Equity Long/Short Common/Collective Hedge Fund-of-funds \| Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Notice for redemption of equity investment	90 days
Other Postretirement Benefits Plan \| Global Equity Long/Short Common/Collective Hedge Fund-of-funds \| Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Notice for redemption of equity investment	120 days
Other Postretirement Benefits Plan \| Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Purchases, sales or transfers of assets classified as level 3	$ 0	0
Postemployment Retirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Curtailment gain	0	23,830,000	$ 0
Liability (gain)/loss due to curtailment		23,830,000
Postemployment benefit obligation	1,771,000	2,233,000
Retiree Medical Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Non-current assets	$ 614,000	$ 631,000