Revenue from Contracts with Customers - Disaggregation (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | $ 1,474 | $ 1,171 | $ 5,929 | $ 5,349 |
Other revenue | 22 | 28 | 80 | 86 |
Total revenues | 1,496 | 1,199 | 6,009 | 5,435 |
Total Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 168 | 171 | 864 | 861 |
Residential | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 90 | 103 | 498 | 499 |
Commercial & Industrial | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 34 | 30 | 190 | 193 |
Large delivery service | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 33 | 30 | 117 | 113 |
Off-system sales and capacity releases | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 6 | 5 | 43 | 44 |
Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 5 | 3 | 16 | 12 |
Total Non-Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 1,306 | 1,000 | 5,065 | 4,488 |
Retail | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 800 | 622 | 3,250 | 2,911 |
Wholesale | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 77 | 32 | 235 | 172 |
Energy Marketing | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 311 | 223 | 1,205 | 1,005 |
Pipeline | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 45 | 40 | 138 | 128 |
Peaking | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 1 | (1) | 12 | 6 |
Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 2 | 3 | 6 | 6 |
Electricity Generation | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 1 | 6 | 8 | 23 |
Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 69 | 75 | 211 | 237 |
Eliminations | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | (39) | (27) | (233) | (200) |
Other revenue | (1) | (1) | (3) | (2) |
Total revenues | (40) | (28) | (236) | (202) |
Eliminations | Total Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | (10) | (7) | (50) | (38) |
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) | (7) | (49) | (37) |
Eliminations | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | (1) | (1) |
Eliminations | Total Non-Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | (29) | (20) | (183) | (162) |
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 | (24) | (16) | (89) | (64) |
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 | (5) | (4) | (94) | (96) |
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 | 0 | 0 | (2) |
Eliminations | AmeriGas Propane | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues | 0 | 0 | 0 | 0 |
Eliminations | UGI International | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues | 0 | 0 | 0 | 0 |
Eliminations | Midstream & Marketing | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues | 29 | 20 | 183 | 162 |
Eliminations | UGI Utilities | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues | 10 | 7 | 50 | 38 |
Operating Segments | AmeriGas Propane | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 510 | 435 | 2,082 | 1,934 |
Other revenue | 16 | 16 | 50 | 49 |
Total revenues | 526 | 451 | 2,132 | 1,983 |
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 | 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 Non-Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 510 | 435 | 2,082 | 1,934 |
Operating Segments | AmeriGas Propane | Retail | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 424 | 372 | 1,829 | 1,715 |
Operating Segments | AmeriGas Propane | Wholesale | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 35 | 10 | 92 | 51 |
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 | 51 | 53 | 161 | 168 |
Operating Segments | UGI International | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 565 | 366 | 2,084 | 1,709 |
Other revenue | 7 | 5 | 22 | 17 |
Total revenues | 572 | 371 | 2,106 | 1,726 |
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 | 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 Non-Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 565 | 366 | 2,084 | 1,709 |
Operating Segments | UGI International | Retail | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 376 | 250 | 1,421 | 1,196 |
Operating Segments | UGI International | Wholesale | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 42 | 22 | 143 | 121 |
Operating Segments | UGI International | Energy Marketing | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 129 | 81 | 470 | 349 |
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 | 18 | 13 | 50 | 43 |
Operating Segments | Midstream & Marketing | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 260 | 219 | 1,082 | 1,007 |
Other revenue | 1 | 3 | 4 | 10 |
Total revenues | 261 | 222 | 1,086 | 1,017 |
Operating Segments | Midstream & Marketing | Total Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Operating Segments | Midstream & Marketing | Residential | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Operating Segments | Midstream & Marketing | Commercial & Industrial | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Operating Segments | Midstream & Marketing | Large delivery service | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 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 | 0 |
Operating Segments | Midstream & Marketing | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Operating Segments | Midstream & Marketing | Total Non-Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 260 | 219 | 1,082 | 1,007 |
Operating Segments | Midstream & Marketing | Retail | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Operating Segments | Midstream & Marketing | Wholesale | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Operating Segments | Midstream & Marketing | Energy Marketing | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 206 | 158 | 824 | 720 |
Operating Segments | Midstream & Marketing | Pipeline | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 45 | 40 | 138 | 128 |
Operating Segments | Midstream & Marketing | Peaking | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 6 | 3 | 106 | 102 |
Operating Segments | Midstream & Marketing | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 2 | 3 | 6 | 6 |
Operating Segments | Midstream & Marketing | Electricity Generation | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 1 | 6 | 8 | 23 |
Operating Segments | Midstream & Marketing | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 9 | 0 | 28 |
Operating Segments | UGI Utilities | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 178 | 178 | 914 | 899 |
Other revenue | 3 | 1 | 9 | 2 |
Total revenues | 181 | 179 | 923 | 901 |
Operating Segments | UGI Utilities | Total Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 178 | 178 | 914 | 899 |
Operating Segments | UGI Utilities | Residential | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 90 | 103 | 498 | 499 |
Operating Segments | UGI Utilities | Commercial & Industrial | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 34 | 30 | 190 | 193 |
Operating Segments | UGI Utilities | Large delivery service | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 33 | 30 | 117 | 113 |
Operating Segments | UGI Utilities | Off-system sales and capacity releases | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 16 | 12 | 92 | 81 |
Operating Segments | UGI Utilities | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 5 | 3 | 17 | 13 |
Operating Segments | UGI Utilities | Total Non-Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
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 |
Corporate & Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Other revenue | (4) | 4 | (2) | 10 |
Total revenues | (4) | 4 | (2) | 10 |
Corporate & Other | Total Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
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 Non-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 |