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Employee Benefit Plans - Schedule of Measurement of Partnership's Pension Plan Assets by Category (Details) - Pension Benefits [Member] - USD ($) $ in Thousands | Sep. 27, 2025 | Sep. 28, 2024 | Sep. 30, 2023
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Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |  |  |
Fair value of plan assets |  | $ 48,175 | [1],[2] | $ 52,758 | [1],[2] | $ 51,340
Short-term investments [Member] |  |  |  |  |  |
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |  |  |
Fair value of plan assets | [1] | 1,504 |  | 1,466 |  |
Domestic equity securities [Member] |  |  |  |  |  |
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |  |  |
Fair value of plan assets | [1],[3] | 4,480 |  | 2,855 |  |
International equity securities [Member] |  |  |  |  |  |
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |  |  |
Fair value of plan assets | [1],[3] | 2,603 |  | 4,975 |  |
Fixed income securities [Member] |  |  |  |  |  |
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |  |  |
Fair value of plan assets | [1],[2] | $ 39,588 |  | $ 43,462 |  |
[1] | Includes funds which are not publicly traded and are valued at the net asset value of the units provided by the fund issuer.
[2] | Includes funds which invest primarily in publicly traded and non-publicly traded, investment grade corporate bonds, U.S. government bonds and asset-backed securities.
[3] | Includes funds which invest primarily in a diversified portfolio of publicly traded U.S. and Non-U.S. common stock.

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