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Investments in and Acquisitions and Dispositions of Businesses - Summary of Acquisition and Purchase Price Allocation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 27, 2025 | Sep. 28, 2024 | Sep. 30, 2023
Texas ,Florida And Nevada [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business acquisition, cost of acquired, cash paid | [1],[2] |  | $ 26,361 |
New Mexico [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business acquisition, cost of acquired, cash paid | [2],[3] | $ 60,061 |  |
Washington [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business acquisition, cost of acquired, cash paid | [2],[4] |  |  | $ 19,651
[1] | Includes three acquisitions of propane retailers located in Florida, Nevada, and Texas
[2] | Total consideration includes non-compete consideration, which will be paid over the respective non-compete periods subject to compliance with the terms of the respective agreements, investments in the Partnership's equity-method and cost-method investees, and excludes working capital adjustments.
[3] | Include s one acquisition of a propane retailer located in New Mexico
[4] | Includes one acquisition of a propane retailer located in Washington

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