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Goodwill and Other Intangible Assets - Carrying Values of Goodwill Assigned to Partnership's Operating Segments (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 28, 2024 | Sep. 30, 2023
Goodwill [Line Items] |  |  |
Goodwill |  | $ 1,157,714 | $ 1,155,238
Accumulated adjustments |  | (6,462) | (6,462)
Goodwill, net |  | 1,151,252 | 1,148,776
Goodwill acquired | [1] | 2,476 |
Propane [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  | 1,107,655 | 1,105,179
Accumulated adjustments |  | 0 | 0
Goodwill, net |  | 1,107,655 | 1,105,179
Goodwill acquired | [1] | 2,476 |
Fuel Oil and Refined Fuels [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  | 10,900 | 10,900
Accumulated adjustments |  | (6,462) | (6,462)
Goodwill, net |  | 4,438 | 4,438
Goodwill acquired | [1] | 0 |
Natural Gas and Electricity [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  | 7,900 | 7,900
Accumulated adjustments |  | 0 | 0
Goodwill, net |  | 7,900 | 7,900
Goodwill acquired | [1] | 0 |
All Other [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  | 31,259 | 31,259
Accumulated adjustments |  | 0 | 0
Goodwill, net |  | 31,259 | $ 31,259
Goodwill acquired | [1] | $ 0 |
[1] | Reflects the impact from acquisitions (See Note 4).

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