Revenue from Contracts with Customers - Disaggregation (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2021 | Mar. 31, 2020 |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | $ 2,552 | $ 2,203 | $ 4,455 | $ 4,178 |
Other revenue | 29 | 26 | 58 | 58 |
Total revenues | 2,581 | 2,229 | 4,513 | 4,236 |
Total Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 412 | 376 | 696 | 690 |
Residential | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 243 | 212 | 408 | 396 |
Commercial & Industrial | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 96 | 95 | 156 | 163 |
Large delivery service | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 44 | 42 | 84 | 83 |
Off-system sales and capacity releases | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 22 | 22 | 37 | 39 |
Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 7 | 5 | 11 | 9 |
Total Non-Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 2,140 | 1,827 | 3,759 | 3,488 |
Retail | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 1,395 | 1,195 | 2,450 | 2,289 |
Wholesale | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 99 | 74 | 158 | 140 |
Energy Marketing | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 514 | 419 | 894 | 782 |
Pipeline | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 48 | 45 | 93 | 88 |
Peaking | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 9 | 3 | 11 | 7 |
Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 2 | 1 | 4 | 3 |
Electricity Generation | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 3 | 8 | 7 | 17 |
Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 70 | 82 | 142 | 162 |
Eliminations | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | (117) | (94) | (194) | (173) |
Other revenue | (1) | 0 | (2) | (1) |
Total revenues | (118) | (94) | (196) | (174) |
Eliminations | Total Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | (25) | (16) | (40) | (31) |
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 | (25) | (16) | (39) | (30) |
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 | (92) | (78) | (154) | (142) |
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 | (39) | (22) | (65) | (48) |
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 | (53) | (54) | (89) | (92) |
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 | (2) | 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 | 92 | 78 | 154 | 142 |
Eliminations | UGI Utilities | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues | 25 | 16 | 40 | 31 |
Operating Segments | AmeriGas Propane | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 925 | 787 | 1,572 | 1,499 |
Other revenue | 15 | 15 | 34 | 33 |
Total revenues | 940 | 802 | 1,606 | 1,532 |
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 | 925 | 787 | 1,572 | 1,499 |
Operating Segments | AmeriGas Propane | Retail | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 833 | 712 | 1,405 | 1,343 |
Operating Segments | AmeriGas Propane | Wholesale | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 38 | 19 | 57 | 41 |
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 | 54 | 56 | 110 | 115 |
Operating Segments | UGI International | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 825 | 700 | 1,519 | 1,343 |
Other revenue | 9 | 4 | 15 | 12 |
Total revenues | 834 | 704 | 1,534 | 1,355 |
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 | 825 | 700 | 1,519 | 1,343 |
Operating Segments | UGI International | Retail | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 562 | 483 | 1,045 | 946 |
Operating Segments | UGI International | Wholesale | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 61 | 55 | 101 | 99 |
Operating Segments | UGI International | Energy Marketing | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 186 | 144 | 341 | 268 |
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 | 16 | 18 | 32 | 30 |
Operating Segments | Midstream & Marketing | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 482 | 418 | 822 | 788 |
Other revenue | 2 | 4 | 3 | 7 |
Total revenues | 484 | 422 | 825 | 795 |
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 | 482 | 418 | 822 | 788 |
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 | 367 | 297 | 618 | 562 |
Operating Segments | Midstream & Marketing | Pipeline | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 48 | 45 | 93 | 88 |
Operating Segments | Midstream & Marketing | Peaking | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 62 | 57 | 100 | 99 |
Operating Segments | Midstream & Marketing | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 2 | 1 | 4 | 3 |
Operating Segments | Midstream & Marketing | Electricity Generation | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 3 | 8 | 7 | 17 |
Operating Segments | Midstream & Marketing | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 10 | 0 | 19 |
Operating Segments | UGI Utilities | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 437 | 392 | 736 | 721 |
Other revenue | 5 | 1 | 6 | 1 |
Total revenues | 442 | 393 | 742 | 722 |
Operating Segments | UGI Utilities | Total Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 437 | 392 | 736 | 721 |
Operating Segments | UGI Utilities | Residential | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 243 | 212 | 408 | 396 |
Operating Segments | UGI Utilities | Commercial & Industrial | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 96 | 95 | 156 | 163 |
Operating Segments | UGI Utilities | Large delivery service | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 44 | 42 | 84 | 83 |
Operating Segments | UGI Utilities | Off-system sales and capacity releases | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 47 | 38 | 76 | 69 |
Operating Segments | UGI Utilities | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 7 | 5 | 12 | 10 |
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 | (1) | 2 | 2 | 6 |
Total revenues | (1) | 2 | 2 | 6 |
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 |