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v3.19.1

Partnership Organization and Formation - Additional Information (Details) - shares | Mar. 30, 2019 | Sep. 29, 2018
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Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items] |  |
Common units outstanding (in units) | 61,663,627 | 61,405,000
Ownership interest in Suburban Energy Finance Corp (in hundredths) | 100.00% |
General Partner [Member] | Common Unitholders [Member] |  |
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items] |  |
Common units outstanding (in units) | 784 |

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