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Debt - Schedule of Short-term Debt (Footnotes) (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022
AmeriGas OLP |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | $ 600,000,000 | $ 600,000,000
Energy Services |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | 260,000,000 | 260,000,000
UGI Utilities |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | 425,000,000 | 350,000,000
Mountaineer |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | 150,000,000 | 100,000,000
UGI Corporation |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | 300,000,000 | 300,000,000
Line of Credit | AmeriGas OLP | Letter of Credit | AmeriGas OLP Credit Agreement |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | 100,000,000 | $ 100,000,000
Line of Credit | Energy Services | Letter of Credit | Energy Services Credit Agreement |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | 50,000,000 |
Line of Credit | UGI Utilities | Letter of Credit | UGI Utilities, Inc. Credit Agreement |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | 100,000,000 |
Line of Credit | Mountaineer | Letter of Credit |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | 20,000,000 |
Line of Credit | UGI Corporation | 2021 UGI Corporation Senior Credit Facility |  |
Short-term Debt [Line Items] |  |
Repayment of debt | 87,000,000 |
Line of Credit | UGI Corporation | Letter of Credit | 2021 UGI Corporation Senior Credit Facility |  |
Short-term Debt [Line Items] |  |
Maximum borrowing capacity | $ 10,000,000 |

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