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Goodwill and Other Intangible Assets - Carrying Values of Goodwill Assigned to Partnership's Operating Segments (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Mar. 25, 2023 | Sep. 24, 2022
Goodwill [Line Items] |  |  |
Goodwill |  | $ 1,151,644 | $ 1,119,885
Accumulated adjustments |  | (6,462) | (6,462)
Goodwill, net |  | 1,145,182 | 1,113,423
Goodwill acquired | [1] | 31,759 |
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 |
Propane [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  | 1,101,085 | 1,101,085
Accumulated adjustments |  | 0 | 0
Goodwill, net |  | 1,101,085 | 1,101,085
Goodwill acquired | [1] | 0 |
All Other [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  | 31,759 | 0
Accumulated adjustments |  | 0 | 0
Goodwill, net |  | 31,759 | $ 0
Goodwill acquired | [1] | $ 31,759 |
[1] | (1) Reflects the impact of the acquisition; see Note 4, “Investments in and Acquisitions of Businesses.”

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