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Revenue from Contracts with Customers - Disaggregated Revenues by Reportable Segment (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | $ 2,721 | $ 2,636
Other revenues | 38 | 37
Total revenues | 2,759 | 2,673
Total Utility |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 557 | 395
Residential |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 336 | 234
Commercial & Industrial |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 132 | 94
Large delivery service |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 47 | 43
Off-system sales and capacity releases |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 32 | 19
Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 10 | 5
Total Non-Utility |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 2,164 | 2,241
Retail |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 1,116 | 1,250
Wholesale |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 102 | 140
Energy Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 778 | 714
Pipeline |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 65 | 46
Peaking |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 17 | 6
Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 3 | 2
Electricity Generation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 8 | 5
Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 75 | 78
Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | (149) | (117)
Other revenues | 0 | (1)
Total revenues | (149) | (118)
Eliminations | Total Utility |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | (33) | (23)
Eliminations | Residential |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Eliminations | Commercial & Industrial |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Eliminations | Large delivery service |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Eliminations | Off-system sales and capacity releases |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | (33) | (22)
Eliminations | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | (1)
Eliminations | Total Non-Utility |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | (116) | (94)
Eliminations | Retail |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Eliminations | Wholesale |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Eliminations | Energy Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | (77) | (55)
Eliminations | Pipeline |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Eliminations | Peaking |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | (39) | (39)
Eliminations | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Eliminations | Electricity Generation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Eliminations | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Eliminations | AmeriGas Propane |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Eliminations | UGI International |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Eliminations | Midstream & Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 115 | 94
Eliminations | Utilities |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 33 | 23
Operating Segments | AmeriGas Propane |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 742 | 760
Other revenues | 24 | 18
Total revenues | 766 | 778
Operating Segments | AmeriGas Propane | Total Utility |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | AmeriGas Propane | Residential |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | AmeriGas Propane | Commercial & Industrial |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | AmeriGas Propane | Large delivery service |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 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
Operating Segments | AmeriGas Propane | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | AmeriGas Propane | Total Non-Utility |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 742 | 760
Operating Segments | AmeriGas Propane | Retail |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 634 | 646
Operating Segments | AmeriGas Propane | Wholesale |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 51 | 56
Operating Segments | AmeriGas Propane | Energy Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | AmeriGas Propane | Pipeline |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | AmeriGas Propane | Peaking |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | AmeriGas Propane | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | AmeriGas Propane | Electricity Generation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | AmeriGas Propane | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 57 | 58
Operating Segments | UGI International |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 869 | 1,041
Other revenues | 8 | 8
Total revenues | 877 | 1,049
Operating Segments | UGI International | Total Utility |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | UGI International | Residential |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | UGI International | Commercial & Industrial |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | UGI International | Large delivery service |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 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
Operating Segments | UGI International | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | UGI International | Total Non-Utility |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 869 | 1,041
Operating Segments | UGI International | Retail |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 482 | 604
Operating Segments | UGI International | Wholesale |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 51 | 84
Operating Segments | UGI International | Energy Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 318 | 333
Operating Segments | UGI International | Pipeline |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | UGI International | Peaking |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | UGI International | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | UGI International | Electricity Generation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | UGI International | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 18 | 20
Operating Segments | Midstream & Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 669 | 534
Other revenues | 0 | 1
Total revenues | 669 | 535
Operating Segments | Midstream & Marketing | Total Utility |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | Midstream & Marketing | Residential |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | Midstream & Marketing | Commercial & Industrial |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | Midstream & Marketing | Large delivery service |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 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
Operating Segments | Midstream & Marketing | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | Midstream & Marketing | Total Non-Utility |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 669 | 534
Operating Segments | Midstream & Marketing | Retail |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | Midstream & Marketing | Wholesale |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | Midstream & Marketing | Energy Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 537 | 436
Operating Segments | Midstream & Marketing | Pipeline |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 65 | 46
Operating Segments | Midstream & Marketing | Peaking |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 56 | 45
Operating Segments | Midstream & Marketing | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 3 | 2
Operating Segments | Midstream & Marketing | Electricity Generation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 8 | 5
Operating Segments | Midstream & Marketing | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | Utilities |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 590 | 418
Other revenues | 2 | 1
Total revenues | 592 | 419
Operating Segments | Utilities | Total Utility |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 590 | 418
Operating Segments | Utilities | Residential |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 336 | 234
Operating Segments | Utilities | Commercial & Industrial |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 132 | 94
Operating Segments | Utilities | Large delivery service |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 47 | 43
Operating Segments | Utilities | Off-system sales and capacity releases |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 65 | 41
Operating Segments | Utilities | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 10 | 6
Operating Segments | Utilities | Total Non-Utility |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | Utilities | Retail |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | Utilities | Wholesale |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | Utilities | Energy Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | Utilities | Pipeline |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | Utilities | Peaking |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | Utilities | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | Utilities | Electricity Generation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Operating Segments | Utilities | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Corporate & Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Other revenues | 4 | 10
Total revenues | 4 | 10
Corporate & Other | Total Utility |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Corporate & Other | Residential |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Corporate & Other | Commercial & Industrial |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Corporate & Other | Large delivery service |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Corporate & Other | Off-system sales and capacity releases |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Corporate & Other | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Corporate & Other | Total Non-Utility |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Corporate & Other | Retail |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Corporate & Other | Wholesale |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Corporate & Other | Energy Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Corporate & Other | Pipeline |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Corporate & Other | Peaking |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Corporate & Other | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Corporate & Other | Electricity Generation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | 0 | 0
Corporate & Other | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues from contracts with customers | $ 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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