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Revenue from Contracts with Customers Revenue From Contracts with Customers - Disaggregation (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | $ 2,577.5 |  | $ 4,752.7 |
Other revenue | 28.6 |  | 53.6 |
Total revenues | 2,606.1 | $ 2,812.0 | 4,806.3 | $ 4,937.2
Negative surcharge | (10.5) |  | (14.6) |
Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 240.3 |  | 416.0 |
Commercial & Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 100.7 |  | 168.3 |
Large delivery service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 44.1 |  | 83.6 |
Off-system sales and capacity releases |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 21.9 |  | 37.1 |
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (3.3) |  | (2.8) |
Total Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 403.7 |  | 702.2 |
Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 1,405.6 |  | 2,635.3 |
Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 93.8 |  | 153.8 |
Energy Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 552.1 |  | 1,021.0 |
Pipeline |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 22.4 |  | 41.8 |
Peaking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 8.1 |  | 10.1 |
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.7 |  | 1.7 |
Electricity Generation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 11.6 |  | 23.3 |
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 79.5 |  | 163.5 |
Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 2,173.8 |  | 4,050.5 |
Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (124.1) |  | (234.6) |
Other revenue | (0.7) |  | (1.8) |
Total revenues | (124.8) | (188.9) | (236.4) | (286.0)
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 | (24.5) |  | (47.4) |
Eliminations | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (0.8) |  | (1.5) |
Eliminations | Total Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (25.3) |  | (48.9) |
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 | (46.4) |  | (93.9) |
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 | (51.7) |  | (90.4) |
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 | (0.7) |  | (1.4) |
Eliminations | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (98.8) |  | (185.7) |
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 | 98.8 | 129.0 | 185.7 | 207.2
Eliminations | UGI Utilities |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 25.3 | 58.7 | 48.9 | 76.4
Operating Segments | AmeriGas Propane |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 956.9 |  | 1,760.4 |
Other revenue | 14.7 |  | 31.4 |
Total revenues | 971.6 | 1,040.3 | 1,791.8 | 1,827.6
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 | 874.6 |  | 1,596.5 |
Operating Segments | AmeriGas Propane | Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 25.2 |  | 46.2 |
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 | 57.1 |  | 117.7 |
Operating Segments | AmeriGas Propane | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 956.9 |  | 1,760.4 |
Operating Segments | UGI International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 775.0 |  | 1,477.3 |
Other revenue | 8.2 |  | 16.6 |
Total revenues | 783.2 | $ 909.6 | 1,493.9 | $ 1,693.8
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 | 531.0 |  | 1,038.8 |
Operating Segments | UGI International | Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 68.6 |  | 107.6 |
Operating Segments | UGI International | Energy Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 162.7 |  | 305.8 |
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 | 12.7 |  | 25.1 |
Operating Segments | UGI International | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 775.0 |  | 1,477.3 |
Operating Segments | Midstream and Marketing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 540.7 |  | 998.5 |
Other revenue | 1.7 |  | 3.3 |
Total revenues | 542.4 |  | 1,001.8 |
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 | 435.8 |  | 809.1 |
Operating Segments | Midstream and Marketing | Pipeline |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 22.4 |  | 41.8 |
Operating Segments | Midstream and Marketing | Peaking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 59.8 |  | 100.5 |
Operating Segments | Midstream and Marketing | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 0.7 |  | 1.7 |
Operating Segments | Midstream and Marketing | Electricity Generation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 11.6 |  | 23.3 |
Operating Segments | Midstream and Marketing | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 10.4 |  | 22.1 |
Operating Segments | Midstream and Marketing | Total Non-Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 540.7 |  | 998.5 |
Operating Segments | UGI Utilities |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 429.0 |  | 751.1 |
Other revenue | 0.6 |  | 1.2 |
Total revenues | 429.6 |  | 752.3 |
Operating Segments | UGI Utilities | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 240.3 |  | 416.0 |
Operating Segments | UGI Utilities | Commercial & Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 100.7 |  | 168.3 |
Operating Segments | UGI Utilities | Large delivery service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 44.1 |  | 83.6 |
Operating Segments | UGI Utilities | Off-system sales and capacity releases |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 46.4 |  | 84.5 |
Operating Segments | UGI Utilities | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | (2.5) |  | (1.3) |
Operating Segments | UGI Utilities | Total Utility |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues from contracts with customers | 429.0 |  | 751.1 |
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 | 4.1 |  | 2.9 |
Total revenues | 4.1 |  | 2.9 |
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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