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Equity Method Investments (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2024 | Sep. 30, 2024 | Jun. 30, 2025
Schedule of Equity Method Investments [Line Items] |  |  |  |
Carrying Value | $ 349 | $ 349 | $ 370 | $ 392
Other |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Carrying Value | 0 | 0 | 1 | 1
Midstream & Marketing |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Carrying Value | 339 | 339 | 359 | 387
Acquisition and integration expenses associated with the CMG Acquisition | 0 | 0 |  |
Midstream & Marketing | Aurum Renewables |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Carrying Value | $ 46 | $ 46 | $ 47 | $ 46
Ownership Interest | 40.00% | 40.00% | 40.00% | 40.00%
Midstream & Marketing | Pine Run |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Carrying Value | $ 83 | $ 83 | $ 86 | $ 96
Ownership Interest | 49.00% | 49.00% | 49.00% | 49.00%
Midstream & Marketing | MBL Bioenergy |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Carrying Value | $ 190 | $ 190 | $ 206 | $ 222
Ownership Interest | 99.99% | 99.99% | 99.99% | 99.99%
Midstream & Marketing | Other |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Carrying Value | $ 20 | $ 20 | $ 20 | $ 23
UGI International |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Carrying Value | $ 10 | $ 10 | 10 | $ 4
UGI International | Joint Venture |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Acquisition and integration expenses associated with the CMG Acquisition |  |  | $ 25 |

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