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Revenue from Contracts with Customers - Disaggregation (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | $ 1,331.8 |  | $ 6,084.5 |
Other revenue | 31.9 |  | 85.5 |
Total revenues | 1,363.7 | $ 1,440.9 | 6,170.0 | $ 6,378.1
Negative surcharge | (3.3) |  | 11.3 |
Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 78.1 |  | 494.1 |
Commercial & Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 34.2 |  | 202.5 |
Large delivery service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 27.8 |  | 111.4 |
Off-system sales and capacity releases |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 4.0 |  | 41.1 |
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 8.3 |  | 5.5 |
Total Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 152.4 |  | 854.6 |
Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 754.1 |  | 3,389.4 |
Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 44.5 |  | 198.3 |
Energy Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 274.8 |  | 1,295.8 |
Pipeline |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 17.6 |  | 59.4 |
Peaking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 3.2 |  | 13.3 |
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.1 |  | 1.8 |
Electricity Generation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 8.9 |  | 32.2 |
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 76.2 |  | 239.7 |
Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 1,179.4 |  | 5,229.9 |
Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (38.9) |  | (273.5) |
Other revenue | (0.7) |  | (2.5) |
Total revenues | (39.6) | (44.4) | (276.0) | (330.4)
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 | (10.1) |  | (57.5) |
Eliminations | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (0.8) |  | (2.3) |
Eliminations | Total Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (10.9) |  | (59.8) |
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 | (23.7) |  | (117.6) |
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 | (3.2) |  | (93.6) |
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 | (1.1) |  | (2.5) |
Eliminations | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (28.0) |  | (213.7) |
Eliminations | AmeriGas Propane |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0.0 | 0.0 | 0.0 | 0.0
Eliminations | UGI International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 0.0 | 0.0 | 0.0 | 0.0
Eliminations | Midstream and Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 28.0 | 34.2 | 213.7 | 241.4
Eliminations | UGI Utilities |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 10.9 | 9.6 | 59.8 | 86.0
Operating Segments | AmeriGas Propane |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 462.9 |  | 2,223.3 |
Other revenue | 15.8 |  | 47.2 |
Total revenues | 478.7 | 528.4 | 2,270.5 | 2,356.0
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 Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | AmeriGas Propane | Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 405.9 |  | 2,002.4 |
Operating Segments | AmeriGas Propane | Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 8.8 |  | 55.0 |
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 | 48.2 |  | 165.9 |
Operating Segments | AmeriGas Propane | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 462.9 |  | 2,223.3 |
Operating Segments | UGI International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 478.9 |  | 1,956.2 |
Other revenue | 7.7 |  | 24.3 |
Total revenues | 486.6 | $ 533.6 | 1,980.5 | $ 2,227.4
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 Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | UGI International | Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 348.2 |  | 1,387.0 |
Operating Segments | UGI International | Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 35.7 |  | 143.3 |
Operating Segments | UGI International | Energy Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 80.4 |  | 386.2 |
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 | 14.6 |  | 39.7 |
Operating Segments | UGI International | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 478.9 |  | 1,956.2 |
Operating Segments | Midstream and Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 265.6 |  | 1,264.1 |
Other revenue | 1.7 |  | 5.0 |
Total revenues | 267.3 |  | 1,269.1 |
Operating Segments | Midstream and Marketing | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | Midstream and Marketing | Commercial & Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | Midstream and Marketing | Large delivery service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | Midstream and 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 and Marketing | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | Midstream and Marketing | Total Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | Midstream and Marketing | Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | Midstream and Marketing | Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | Midstream and Marketing | Energy Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 218.1 |  | 1,027.2 |
Operating Segments | Midstream and Marketing | Pipeline |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 17.6 |  | 59.4 |
Operating Segments | Midstream and Marketing | Peaking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 6.4 |  | 106.9 |
Operating Segments | Midstream and Marketing | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.1 |  | 1.8 |
Operating Segments | Midstream and Marketing | Electricity Generation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 8.9 |  | 32.2 |
Operating Segments | Midstream and Marketing | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 14.5 |  | 36.6 |
Operating Segments | Midstream and Marketing | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 265.6 |  | 1,264.1 |
Operating Segments | UGI Utilities |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 163.3 |  | 914.4 |
Other revenue | 0.6 |  | 1.8 |
Total revenues | 163.9 |  | 916.2 |
Operating Segments | UGI Utilities | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 78.1 |  | 494.1 |
Operating Segments | UGI Utilities | Commercial & Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 34.2 |  | 202.5 |
Operating Segments | UGI Utilities | Large delivery service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 27.8 |  | 111.4 |
Operating Segments | UGI Utilities | Off-system sales and capacity releases |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 14.1 |  | 98.6 |
Operating Segments | UGI Utilities | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 9.1 |  | 7.8 |
Operating Segments | UGI Utilities | Total Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 163.3 |  | 914.4 |
Operating Segments | UGI Utilities | Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | UGI Utilities | Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | UGI Utilities | Energy Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | UGI Utilities | Pipeline |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | UGI Utilities | Peaking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | UGI Utilities | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | UGI Utilities | Electricity Generation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | UGI Utilities | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Operating Segments | UGI Utilities | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Corporate & Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
Other revenue | 6.8 |  | 9.7 |
Total revenues | 6.8 |  | 9.7 |
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 Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.0 |  | 0.0 |
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 |  | 0.0 |
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 |
Corporate & Other | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | $ 0.0 |  | $ 0.0 |

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