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Employee Pension and Profit Sharing Plans - Schedule of Allocation of Plan Assets (Details) - USD ($) $ in Thousands | Sep. 29, 2023 | Sep. 30, 2022 | Oct. 01, 2021
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | $ 157,810 | $ 161,504 | $ 239,013
Quoted prices in active markets Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 15,608 | 8,387 |
Significant other observable inputs Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 141,273 | 143,310 |
Significant unobservable inputs Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 929 | 9,807 |
Cash and cash equivalents | Quoted prices in active markets Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 14,017 | 6,746 |
Investment trusts | Quoted prices in active markets Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 1,591 | 1,641 |
Investment Funds - Equity | Significant other observable inputs Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 14,374 | 67,035 |
Investment Funds - Fixed Income Funds | Significant other observable inputs Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 126,899 | 76,275 |
Real Estate | Significant unobservable inputs Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 929 | 9,807 |
Fair Value Disclosure |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 157,810 | 161,504 |
Fair Value Disclosure | Cash and cash equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 14,017 | 6,746 |
Fair Value Disclosure | Investment trusts |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 1,591 | 1,641 |
Fair Value Disclosure | Investment Funds - Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 14,374 | 67,035 |
Fair Value Disclosure | Investment Funds - Fixed Income Funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | 126,899 | 76,275 |
Fair Value Disclosure | Real Estate |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets | $ 929 | $ 9,807 |

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