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Goodwill and Other Intangible Assets - Carrying Values of Goodwill Assigned to Partnership's Operating Segments (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Jun. 25, 2022 | Sep. 25, 2021
Goodwill [Line Items] |  |  |
Goodwill |  | $ 1,113,089 | $ 1,113,488
Accumulated adjustments |  | (6,462) | (6,462)
Goodwill, net |  | 1,106,627 | 1,107,026
Goodwill disposed | [1] | (399) |
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 disposed | [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 disposed | [1] | 0 |
Propane [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  | 1,094,289 | 1,094,688
Accumulated adjustments |  | 0 | 0
Goodwill, net |  | 1,094,289 | $ 1,094,688
Goodwill disposed | [1] | $ (399) |
[1] | Reflects the impact from the disposition of certain assets and operations in a non-strategic market of the propane segment (See Note 4),

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