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v3.19.3.a.u2

Basis of Presentation - Additional Information (Details) | 3 Months Ended |
--- | --- | ---
Dec. 28, 2019 USD ($) wk | Sep. 29, 2019 USD ($)
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Minimum number of weeks in the fiscal year reporting calendar | 52 |
Maximum number of weeks in the fiscal year reporting calendar | 53 |
Minimum number of weeks in a fiscal quarter | 13 |
Maximum number of weeks in a fiscal quarter | 14 |
Remaining or unsatisfied performance obligations | $ | $ 0 |
Assets and Liabilities, Lessee [Abstract] |  |
Operating Lease, Right-of-Use Asset | $ | 104,891,000 | $ 103,100,000
Operating Lease, Liability | $ | $ 104,639,000 | $ 103,100,000
Tank Rent and Maintenance Service [Member] |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Revenue recognition, recognition period | 1 year |
Suburban Propane Partners, L.P. [Member] |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Limited partner interest in the Operating Partnership (in hundredths) | 100.00% |

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