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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, 2022 | Sep. 30, 2021 | Sep. 30, 2020
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | $ 9,981 | $ 7,348 | $ 6,452
Other revenues | 125 | 99 | 107
Total revenues | 10,106 | 7,447 | 6,559
Residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 875 | 568 | 563
Commercial & Industrial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 365 | 218 | 215
Large delivery service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 171 | 148 | 142
Off-system sales and capacity releases |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 76 | 51 | 48
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 23 | 21 | 14
Total Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 1,510 | 1,006 | 982
Retail |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 4,436 | 3,957 | 3,499
Wholesale |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 496 | 328 | 211
Energy Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 2,951 | 1,564 | 1,233
Pipeline |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 211 | 181 | 168
Peaking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 48 | 16 | 6
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 9 | 8 | 7
Electricity Generation |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 34 | 13 | 34
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 286 | 275 | 312
Total Non-Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 8,471 | 6,342 | 5,470
Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (474) | (288) | (229)
Other revenues | (3) | (3) | (3)
Total revenues | (477) | (291) | (232)
Eliminations | Residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Eliminations | Commercial & Industrial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Eliminations | Large delivery service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Eliminations | Off-system sales and capacity releases |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (104) | (62) | (45)
Eliminations | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (1) | (2) | (2)
Eliminations | Total Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (105) | (64) | (47)
Eliminations | Retail |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Eliminations | Wholesale |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Eliminations | Energy Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (264) | (126) | (79)
Eliminations | Pipeline |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Eliminations | Peaking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (105) | (98) | (100)
Eliminations | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Eliminations | Electricity Generation |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Eliminations | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | (3)
Eliminations | Total Non-Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | (369) | (224) | (182)
Eliminations | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 0 | 0 | 0
Eliminations | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 0 | 0 | 0
Eliminations | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 369 | 224 | 182
Eliminations | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 105 | 64 | 47
Operating Segments | AmeriGas Propane |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 2,864 | 2,548 | 2,315
Other revenues | 79 | 66 | 66
Total revenues | 2,943 | 2,614 | 2,381
Operating Segments | AmeriGas Propane | Residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Commercial & Industrial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Large delivery service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 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
Operating Segments | AmeriGas Propane | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Total Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Retail |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 2,439 | 2,203 | 2,037
Operating Segments | AmeriGas Propane | Wholesale |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 218 | 139 | 63
Operating Segments | AmeriGas Propane | Energy Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Pipeline |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Peaking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Electricity Generation |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | AmeriGas Propane | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 207 | 206 | 215
Operating Segments | AmeriGas Propane | Total Non-Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 2,864 | 2,548 | 2,315
Operating Segments | UGI International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 3,652 | 2,617 | 2,104
Other revenues | 34 | 34 | 23
Total revenues | 3,686 | 2,651 | 2,127
Operating Segments | UGI International | Residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | UGI International | Commercial & Industrial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | UGI International | Large delivery service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 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
Operating Segments | UGI International | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | UGI International | Total Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | UGI International | Retail |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 1,997 | 1,754 | 1,462
Operating Segments | UGI International | Wholesale |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 278 | 189 | 148
Operating Segments | UGI International | Energy Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 1,298 | 605 | 434
Operating Segments | UGI International | Pipeline |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | UGI International | Peaking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | UGI International | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | UGI International | Electricity Generation |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | UGI International | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 79 | 69 | 60
Operating Segments | UGI International | Total Non-Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 3,652 | 2,617 | 2,104
Operating Segments | Midstream & Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 2,324 | 1,401 | 1,233
Other revenues | 2 | 5 | 14
Total revenues | 2,326 | 1,406 | 1,247
Operating Segments | Midstream & Marketing | Residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Midstream & Marketing | Commercial & Industrial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Midstream & Marketing | Large delivery service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 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
Operating Segments | Midstream & Marketing | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Midstream & Marketing | Total Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Midstream & Marketing | Retail |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Midstream & Marketing | Wholesale |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Midstream & Marketing | Energy Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 1,917 | 1,085 | 878
Operating Segments | Midstream & Marketing | Pipeline |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 211 | 181 | 168
Operating Segments | Midstream & Marketing | Peaking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 153 | 114 | 106
Operating Segments | Midstream & Marketing | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 9 | 8 | 7
Operating Segments | Midstream & Marketing | Electricity Generation |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 34 | 13 | 34
Operating Segments | Midstream & Marketing | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 40
Operating Segments | Midstream & Marketing | Total Non-Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 2,324 | 1,401 | 1,233
Operating Segments | Utilities |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 1,615 | 1,070 | 1,029
Other revenues | 5 | 9 | 1
Total revenues | 1,620 | 1,079 | 1,030
Operating Segments | Utilities | Residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 875 | 568 | 563
Operating Segments | Utilities | Commercial & Industrial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 365 | 218 | 215
Operating Segments | Utilities | Large delivery service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 171 | 148 | 142
Operating Segments | Utilities | Off-system sales and capacity releases |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 180 | 113 | 93
Operating Segments | Utilities | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 24 | 23 | 16
Operating Segments | Utilities | Total Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 1,615 | 1,070 | 1,029
Operating Segments | Utilities | Retail |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Utilities | Wholesale |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Utilities | Energy Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Utilities | Pipeline |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Utilities | Peaking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Utilities | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Utilities | Electricity Generation |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Utilities | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Operating Segments | Utilities | Total Non-Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate & Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Other revenues | 8 | (12) | 6
Total revenues | 8 | (12) | 6
Corporate & Other | Residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate & Other | Commercial & Industrial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate & Other | Large delivery service |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 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
Corporate & Other | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate & Other | Total Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate & Other | Retail |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate & Other | Wholesale |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate & Other | Energy Marketing |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate & Other | Pipeline |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate & Other | Peaking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate & Other | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate & Other | Electricity Generation |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate & Other | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate & Other | Total Non-Utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues from contracts with customers | $ 0 | $ 0 | $ 0

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. 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