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Summary of Significant Accounting Policies - (Narrative) (Details) - Affiliated Entity - Penn East Pipeline Company LLC | Dec. 31, 2020
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UGI Penn East LLC |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Equity method investment ownership percent | 20.00%
Southern Company |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Equity method investment ownership percent | 20.00%
New Jersey Resources |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Equity method investment ownership percent | 20.00%
South Jersey Industries |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Equity method investment ownership percent | 20.00%
Enbridge Inc |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Equity method investment ownership percent | 20.00%

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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