Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Amount of contributions received and expected to be received by defined benefit plan from employer in current fiscal year.

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Amount of the obligation recognized by withdrawing from a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

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Amount of cash outflow for pension benefit. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. Excludes other postretirement benefit.

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Pension Plans and Other Postretirement Benefits - Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 29, 2025	Mar. 30, 2024	Sep. 28, 2024
Components of net periodic benefit costs included in operating expenses [Abstract]
Contribution to defined pension benefit plan	$ 2,000	$ 2,000
Estimated obligation due to full withdrawal multi employer pension plans	19,296		$ 20,026
Pension Plans Defined Benefit [Member]
Components of net periodic benefit costs included in operating expenses [Abstract]
Defined benefit plan expected future benefit payments	4,000
Pension Plans Defined Benefit [Member] \| Other Nonoperating Income (Expense) [Member]
Components of net periodic benefit costs included in operating expenses [Abstract]
Contribution to defined pension benefit plan	2,000
Post Retirement Benefits [Member]
Components of net periodic benefit costs included in operating expenses [Abstract]
Defined benefit plan expected future benefit payments	342
Post Retirement Benefits [Member] \| Other Nonoperating Income (Expense) [Member]
Components of net periodic benefit costs included in operating expenses [Abstract]
Employer contribution for postretirement health care and life insurance	$ 146