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Debt - Schedule of Long-term Debt (Footnotes) (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019
AmeriGas Propane | Senior Secured Notes | HOLP Senior Secured Notes |  |
Debt Instrument [Line Items] |  |
Effective interest rate (as a percentage) |  | 6.75%
UGI International | Term Loan | Variable-rate term loan |  |
Debt Instrument [Line Items] |  |
Effective interest rate (as a percentage) | 2.04% | 2.04%
Midstream & Marketing | Term Loan | Variable-rate term loan |  |
Debt Instrument [Line Items] |  |
Effective interest rate (as a percentage) | 5.30% | 5.79%
Quarterly Installments | $ 2,000,000 |
UGI Utilities | Term Loan | Variable-rate term loan |  |
Debt Instrument [Line Items] |  |
Effective interest rate (as a percentage) | 4.00% | 3.05%
Quarterly Installments | $ 2,000,000 |
UGI Coporation | Term Loan | 3-year Term loan |  |
Debt Instrument [Line Items] |  |
Effective interest rate (as a percentage) | 3.51% | 4.30%
UGI Coporation | Term Loan | 5-year Term Loan |  |
Debt Instrument [Line Items] |  |
Effective interest rate (as a percentage) | 3.50% | 4.55%
Quarterly Installments | $ 9,000,000 |
UGI Coporation | Line of Credit |  |
Debt Instrument [Line Items] |  |
Effective interest rate (as a percentage) | 2.41% | 4.55%

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