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Pension, Postretirement and Postemployment Defined Benefit Plans - Narrative (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 30, 2025 USD ($) plan | Mar. 24, 2024 USD ($) participant | Mar. 30, 2025 USD ($) plan | Mar. 24, 2024 USD ($) participant | Sep. 29, 2024 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Number of defined benefit plans | plan | 1 |  | 1 |  |
Multiemployer plans, withdrawal obligation | $ 23,100,000 |  | $ 23,100,000 |  | $ 23,600,000
Multiemployer plans, withdrawal obligation, period (years) |  |  | 20 years |  |
Pension Plan |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Defined benefit plan, plan assets, contributions by employer |  |  | $ 0 | $ 0 |
Defined benefit plan, expected future employer contributions, next fiscal year | 0 |  | 0 |  |
Defined benefit plan, benefit obligation, voluntary settlement, number of participants | participant |  | 522 |  | 522 |
Defined benefit plan, benefit obligation, lump sum payment for settlement |  | $ 22,600,000 |  | $ 22,600,000 |
Settlement gain | $ 0 | $ 0 | $ 0 | 2,409,000 |
Defined benefit plan, plan assets, period increase (decrease) |  |  |  | $ (22,600,000) |

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