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Revenue from Contracts with Customers - Disaggregated Revenues by Reportable Segment (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | $ 1,352 | $ 1,620 | $ 5,837 | $ 7,382
Other revenues | 28 | 39 | 131 | 142
Total revenues | 1,380 | 1,659 | 5,968 | 7,524
Total Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 246 | 265 | 1,309 | 1,537
Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 136 | 151 | 771 | 911
Commercial & Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 53 | 60 | 305 | 369
Large delivery service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 41 | 39 | 144 | 139
Off-system sales and capacity releases |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 7 | 7 | 60 | 84
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 9 | 8 | 29 | 34
Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 1,106 | 1,355 | 4,528 | 5,845
Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 742 | 799 | 3,066 | 3,243
Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 54 | 76 | 214 | 287
Energy Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 172 | 336 | 810 | 1,854
Pipeline |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 61 | 58 | 191 | 189
Peaking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 1 | 11 | 28
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 5 | 3 | 12 | 10
Electricity Generation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 6 | 17 | 20 | 27
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 66 | 65 | 204 | 207
Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (28) | (26) | (239) | (301)
Other revenues | 0 | 1 | 0 | (1)
Total revenues | (28) | (25) | (239) | (302)
Eliminations | Total Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (7) | (7) | (43) | (69)
Eliminations | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Eliminations | Commercial & Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Eliminations | Large delivery service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Eliminations | Off-system sales and capacity releases |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (6) | (7) | (42) | (68)
Eliminations | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (1) | 0 | (1) | (1)
Eliminations | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (21) | (19) | (196) | (232)
Eliminations | Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Eliminations | Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Eliminations | Energy Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (16) | (14) | (80) | (130)
Eliminations | Pipeline |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Eliminations | Peaking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (5) | (5) | (116) | (102)
Eliminations | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Eliminations | Electricity Generation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Eliminations | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Eliminations | Utilities |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 7 | 8 | 43 | 69
Eliminations | Midstream & Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 22 | 19 | 197 | 232
Eliminations | UGI International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Eliminations | AmeriGas Propane |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Utilities |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 253 | 272 | 1,352 | 1,606
Other revenues | 4 | 6 | 44 | 38
Total revenues | 257 | 278 | 1,396 | 1,644
Operating Segments | Utilities | Total Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 253 | 272 | 1,352 | 1,606
Operating Segments | Utilities | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 136 | 151 | 771 | 911
Operating Segments | Utilities | Commercial & Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 53 | 60 | 305 | 369
Operating Segments | Utilities | Large delivery service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 41 | 39 | 144 | 139
Operating Segments | Utilities | Off-system sales and capacity releases |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 13 | 14 | 102 | 152
Operating Segments | Utilities | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 10 | 8 | 30 | 35
Operating Segments | Utilities | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Utilities | Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Utilities | Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Utilities | Energy Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Utilities | Pipeline |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Utilities | Peaking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Utilities | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Utilities | Electricity Generation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Utilities | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Midstream & Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 253 | 278 | 1,130 | 1,585
Other revenues | 0 | 1 | 0 | 1
Total revenues | 253 | 279 | 1,130 | 1,586
Operating Segments | Midstream & Marketing | Total Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Midstream & Marketing | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Midstream & Marketing | Commercial & Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Midstream & Marketing | Large delivery service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Midstream & Marketing | Off-system sales and capacity releases |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Midstream & Marketing | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Midstream & Marketing | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 253 | 278 | 1,130 | 1,585
Operating Segments | Midstream & Marketing | Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Midstream & Marketing | Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | Midstream & Marketing | Energy Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 176 | 194 | 780 | 1,229
Operating Segments | Midstream & Marketing | Pipeline |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 61 | 58 | 191 | 189
Operating Segments | Midstream & Marketing | Peaking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 5 | 6 | 127 | 130
Operating Segments | Midstream & Marketing | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 5 | 3 | 12 | 10
Operating Segments | Midstream & Marketing | Electricity Generation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 6 | 17 | 20 | 27
Operating Segments | Midstream & Marketing | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | UGI International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 447 | 602 | 1,825 | 2,409
Other revenues | 8 | 9 | 28 | 27
Total revenues | 455 | 611 | 1,853 | 2,436
Operating Segments | UGI International | Total Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | UGI International | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | UGI International | Commercial & Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | UGI International | Large delivery service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | UGI International | Off-system sales and capacity releases |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | UGI International | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | UGI International | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 447 | 602 | 1,825 | 2,409
Operating Segments | UGI International | Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 378 | 376 | 1,472 | 1,431
Operating Segments | UGI International | Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 36 | 52 | 145 | 167
Operating Segments | UGI International | Energy Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 12 | 156 | 152 | 755
Operating Segments | UGI International | Pipeline |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | UGI International | Peaking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | UGI International | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | UGI International | Electricity Generation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | UGI International | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 21 | 18 | 56 | 56
Operating Segments | AmeriGas Propane |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 427 | 494 | 1,811 | 2,083
Other revenues | 18 | 20 | 58 | 64
Total revenues | 445 | 514 | 1,869 | 2,147
Operating Segments | AmeriGas Propane | Total Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Commercial & Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Large delivery service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Off-system sales and capacity releases |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 427 | 494 | 1,811 | 2,083
Operating Segments | AmeriGas Propane | Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 364 | 423 | 1,594 | 1,812
Operating Segments | AmeriGas Propane | Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 18 | 24 | 69 | 120
Operating Segments | AmeriGas Propane | Energy Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Pipeline |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Peaking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Electricity Generation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 45 | 47 | 148 | 151
Corporate & Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | (42) | 0
Other revenues | (2) | 2 | 1 | 13
Total revenues | (2) | 2 | (41) | 13
Corporate & Other | Total Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Corporate & Other | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Corporate & Other | Commercial & Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Corporate & Other | Large delivery service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Corporate & Other | Off-system sales and capacity releases |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Corporate & Other | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Corporate & Other | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | (42) | 0
Corporate & Other | Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Corporate & Other | Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Corporate & Other | Energy Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | (42) | 0
Reduction in revenue |  |  | 42 |
Corporate & Other | Pipeline |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Corporate & Other | Peaking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Corporate & Other | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Corporate & Other | Electricity Generation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Corporate & Other | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | $ 0 | $ 0 | $ 0 | $ 0

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