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Revenue from Contracts with Customers - Schedule of Disaggregation of Revenue By Reportable Segment (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | $ 6,452 | $ 7,211 |
Other revenues |  |  |  |  |  |  |  |  | 107 | 109 |
Total revenues | $ 1,124 | $ 1,199 | $ 2,229 | $ 2,007 | $ 1,150 | $ 1,364 | $ 2,606 | $ 2,200 | 6,559 | 7,320 | $ 7,651
Negative surcharge |  |  |  |  |  |  |  |  |  | 6 |
Residential |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 563 | 553 |
Commercial & Industrial |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 215 | 226 |
Large delivery service |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 142 | 138 |
Off-system sales and capacity releases |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 48 | 46 |
Other |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 14 | 15 |
Total Utility |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 982 | 978 |
Retail |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 3,499 | 4,008 |
Wholesale |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 211 | 233 |
Energy Marketing |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 1,233 | 1,521 |
Pipeline |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 168 | 95 |
Peaking |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 6 | 17 |
Other |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 7 | 2 |
Electricity Generation |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 34 | 43 |
Other |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 312 | 314 |
Total Non-Utility |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 5,470 | 6,233 |
Eliminations |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | (229) | (302) |
Other revenues |  |  |  |  |  |  |  |  | (3) | (4) |
Total revenues |  |  |  |  |  |  |  |  | (232) | (306) | (371)
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 |  |  |  |  |  |  |  |  | (45) | (65) |
Eliminations | Other |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | (2) | (3) |
Eliminations | Total Utility |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | (47) | (68) |
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 |  |  |  |  |  |  |  |  | (79) | (134) |
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 |  |  |  |  |  |  |  |  | (100) | (97) |
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 |  |  |  |  |  |  |  |  | (3) | (3) |
Eliminations | Total Non-Utility |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | (182) | (234) |
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 |  |  |  |  |  |  |  |  | 182 | 235 | 273
Eliminations | UGI Utilities |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 47 | 68 | 94
Operating Segments | AmeriGas Propane |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 2,315 | 2,618 |
Other revenues |  |  |  |  |  |  |  |  | 66 | 64 |
Total revenues |  |  |  |  |  |  |  |  | 2,381 | 2,682 | 2,823
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 Utility |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 0 | 0 |
Operating Segments | AmeriGas Propane | Retail |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 2,037 | 2,341 |
Operating Segments | AmeriGas Propane | Wholesale |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 63 | 64 |
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 |  |  |  |  |  |  |  |  | 215 | 213 |
Operating Segments | AmeriGas Propane | Total Non-Utility |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 2,315 | 2,618 |
Operating Segments | UGI International |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 2,104 | 2,339 |
Other revenues |  |  |  |  |  |  |  |  | 23 | 33 |
Total revenues |  |  |  |  |  |  |  |  | 2,127 | 2,372 | $ 2,684
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 Utility |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 0 | 0 |
Operating Segments | UGI International | Retail |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 1,462 | 1,667 |
Operating Segments | UGI International | Wholesale |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 148 | 169 |
Operating Segments | UGI International | Energy Marketing |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 434 | 448 |
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 |  |  |  |  |  |  |  |  | 60 | 55 |
Operating Segments | UGI International | Total Non-Utility |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 2,104 | 2,339 |
Operating Segments | Midstream & Marketing |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 1,233 | 1,510 |
Other revenues |  |  |  |  |  |  |  |  | 14 | 6 |
Total revenues |  |  |  |  |  |  |  |  | 1,247 | 1,516 |
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 Utility |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 0 | 0 |
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 |  |  |  |  |  |  |  |  | 878 | 1,207 |
Operating Segments | Midstream & Marketing | Pipeline |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 168 | 95 |
Operating Segments | Midstream & Marketing | Peaking |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 106 | 114 |
Operating Segments | Midstream & Marketing | Other |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 7 | 2 |
Operating Segments | Midstream & Marketing | Electricity Generation |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 34 | 43 |
Operating Segments | Midstream & Marketing | Other |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 40 | 49 |
Operating Segments | Midstream & Marketing | Total Non-Utility |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 1,233 | 1,510 |
Operating Segments | UGI Utilities |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 1,029 | 1,046 |
Other revenues |  |  |  |  |  |  |  |  | 1 | 3 |
Total revenues |  |  |  |  |  |  |  |  | 1,030 | 1,049 |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 563 | 553 |
Operating Segments | UGI Utilities | Commercial & Industrial |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 215 | 226 |
Operating Segments | UGI Utilities | Large delivery service |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 142 | 138 |
Operating Segments | UGI Utilities | Off-system sales and capacity releases |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 93 | 111 |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 16 | 18 |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 1,029 | 1,046 |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 0 | 0 |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 0 | 0 |
Operating Segments | UGI Utilities | Energy Marketing |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 0 | 0 |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 0 | 0 |
Operating Segments | UGI Utilities | Electricity Generation |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 0 | 0 |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Corporate & Other |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues from contracts with customers |  |  |  |  |  |  |  |  | 0 | 0 |
Other revenues |  |  |  |  |  |  |  |  | 6 | 7 |
Total revenues |  |  |  |  |  |  |  |  | 6 | 7 |
Corporate & Other | Residential |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Corporate & Other | Other |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Corporate & Other | Total Utility |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
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