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Revenue from Contracts with Customers - Schedule of Disaggregated Revenues By Reportable Segment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | $ 7,045 | $ 8,761 | $ 9,981
Other revenues | 165 | 167 | 125
Total revenues | 7,210 | 8,928 | 10,106
Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (266) | (323) | (474)
Other revenues | 0 | (3) | (3)
Total revenues | (266) | (326) | (477)
Eliminations | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 49 | 74 | 105
Eliminations | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 217 | 251 | 369
Eliminations | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 0 | 0 | 0
Eliminations | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 0 | 0 | 0
Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 1,552 | 1,816 | 1,615
Other revenues | 46 | 38 | 5
Total revenues | 1,598 | 1,854 | 1,620
Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 1,368 | 1,845 | 2,324
Other revenues | 1 | 2 | 2
Total revenues | 1,369 | 1,847 | 2,326
Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 2,240 | 2,927 | 3,652
Other revenues | 39 | 38 | 34
Total revenues | 2,279 | 2,965 | 3,686
Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 2,193 | 2,496 | 2,864
Other revenues | 78 | 85 | 79
Total revenues | 2,271 | 2,581 | 2,943
Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (42) | 0 | 0
Other revenues | 1 | 7 | 8
Total revenues | (41) | 7 | 8
Total Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 1,503 | 1,742 | 1,510
Total Utility | Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (49) | (74) | (105)
Total Utility | Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 1,552 | 1,816 | 1,615
Total Utility | Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Total Utility | Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Total Utility | Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Total Utility | Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 873 | 1,020 | 875
Residential | Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Residential | Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 873 | 1,020 | 875
Residential | Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Residential | Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Residential | Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Residential | Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Commercial & Industrial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 344 | 413 | 365
Commercial & Industrial | Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Commercial & Industrial | Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 344 | 413 | 365
Commercial & Industrial | Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Commercial & Industrial | Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Commercial & Industrial | Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Commercial & Industrial | Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Large delivery service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 183 | 177 | 171
Large delivery service | Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Large delivery service | Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 183 | 177 | 171
Large delivery service | Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Large delivery service | Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Large delivery service | Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Large delivery service | Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Off-system sales and capacity releases |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 67 | 89 | 76
Off-system sales and capacity releases | Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (48) | (73) | (104)
Off-system sales and capacity releases | Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 115 | 162 | 180
Off-system sales and capacity releases | Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Off-system sales and capacity releases | Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Off-system sales and capacity releases | Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Off-system sales and capacity releases | Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 36 | 43 | 23
Other | Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (1) | (1) | (1)
Other | Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 37 | 44 | 24
Other | Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Other | Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Other | Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Other | Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Total Non-Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 5,542 | 7,019 | 8,471
Total Non-Utility | Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (217) | (249) | (369)
Total Non-Utility | Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Total Non-Utility | Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 1,368 | 1,845 | 2,324
Total Non-Utility | Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 2,240 | 2,927 | 3,652
Total Non-Utility | Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 2,193 | 2,496 | 2,864
Total Non-Utility | Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (42) | 0 | 0
Retail |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 3,733 | 3,952 | 4,436
Retail | Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Retail | Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Retail | Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Retail | Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 1,816 | 1,768 | 1,997
Retail | Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 1,917 | 2,184 | 2,439
Retail | Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Wholesale |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 270 | 325 | 496
Wholesale | Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Wholesale | Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Wholesale | Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Wholesale | Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 180 | 207 | 278
Wholesale | Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 90 | 118 | 218
Wholesale | Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Energy Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 980 | 2,139 | 2,951
Energy Marketing | Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (96) | (143) | (264)
Energy Marketing | Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Energy Marketing | Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 948 | 1,410 | 1,917
Energy Marketing | Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 170 | 872 | 1,298
Energy Marketing | Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Energy Marketing | Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (42) | 0 | 0
Reduction in revenue | 42 |  |
Pipeline |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 246 | 251 | 211
Pipeline | Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Pipeline | Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Pipeline | Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 246 | 251 | 211
Pipeline | Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Pipeline | Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Pipeline | Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Peaking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 10 | 31 | 48
Peaking | Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (121) | (106) | (105)
Peaking | Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Peaking | Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 131 | 137 | 153
Peaking | Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Peaking | Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Peaking | Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 16 | 14 | 9
Other | Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Other | Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Other | Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 16 | 14 | 9
Other | Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Other | Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Other | Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Electricity Generation |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 27 | 33 | 34
Electricity Generation | Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Electricity Generation | Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Electricity Generation | Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 27 | 33 | 34
Electricity Generation | Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Electricity Generation | Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Electricity Generation | Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 260 | 274 | 286
Other | Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Other | Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Other | Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Other | Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 74 | 80 | 79
Other | Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 186 | 194 | 207
Other | Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | $ 0 | $ 0 | $ 0

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