Revenue from Contracts with Customers - Disaggregated Revenues by Reportable Segment (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021 |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | $ 3,442 | $ 2,552 | $ 6,078 | $ 4,455 |
Other revenues | 24 | 29 | 61 | 58 |
Total revenues | 3,466 | 2,581 | 6,139 | 4,513 |
Total Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 665 | 412 | 1,060 | 696 |
Residential | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 400 | 243 | 634 | 408 |
Commercial & Industrial | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 167 | 96 | 261 | 156 |
Large delivery service | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 54 | 44 | 97 | 84 |
Off-system sales and capacity releases | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 37 | 22 | 56 | 37 |
Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 7 | 7 | 12 | 11 |
Total Non-Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 2,777 | 2,140 | 5,018 | 3,759 |
Retail | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 1,554 | 1,395 | 2,804 | 2,450 |
Wholesale | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 154 | 99 | 294 | 158 |
Energy Marketing | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 909 | 514 | 1,623 | 894 |
Pipeline | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 50 | 48 | 96 | 93 |
Peaking | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 23 | 9 | 29 | 11 |
Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 2 | 2 | 4 | 4 |
Electricity Generation | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 14 | 3 | 19 | 7 |
Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 71 | 70 | 149 | 142 |
Eliminations | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | (178) | (117) | (295) | (194) |
Other revenues | (1) | (1) | (2) | (2) |
Total revenues | (179) | (118) | (297) | (196) |
Eliminations | Total Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | (40) | (25) | (63) | (40) |
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 | (40) | (25) | (62) | (39) |
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 | (138) | (92) | (232) | (154) |
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 | (81) | (39) | (136) | (65) |
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 | (57) | (53) | (96) | (89) |
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 | 0 |
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 | 138 | 92 | 232 | 154 |
Eliminations | Utilities | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues | 40 | 25 | 63 | 40 |
Operating Segments | AmeriGas Propane | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 1,030 | 925 | 1,790 | 1,572 |
Other revenues | 18 | 15 | 36 | 34 |
Total revenues | 1,048 | 940 | 1,826 | 1,606 |
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 | 1,030 | 925 | 1,790 | 1,572 |
Operating Segments | AmeriGas Propane | Retail | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 908 | 833 | 1,554 | 1,405 |
Operating Segments | AmeriGas Propane | Wholesale | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 68 | 38 | 124 | 57 |
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 | 54 | 112 | 110 |
Operating Segments | UGI International | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 1,215 | 825 | 2,256 | 1,519 |
Other revenues | 9 | 9 | 17 | 15 |
Total revenues | 1,224 | 834 | 2,273 | 1,534 |
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 | 1,215 | 825 | 2,256 | 1,519 |
Operating Segments | UGI International | Retail | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 646 | 562 | 1,250 | 1,045 |
Operating Segments | UGI International | Wholesale | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 86 | 61 | 170 | 101 |
Operating Segments | UGI International | Energy Marketing | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 466 | 186 | 799 | 341 |
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 | 17 | 16 | 37 | 32 |
Operating Segments | Midstream & Marketing | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 670 | 482 | 1,204 | 822 |
Other revenues | 1 | 2 | 2 | 3 |
Total revenues | 671 | 484 | 1,206 | 825 |
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 | 670 | 482 | 1,204 | 822 |
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 | 524 | 367 | 960 | 618 |
Operating Segments | Midstream & Marketing | Pipeline | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 50 | 48 | 96 | 93 |
Operating Segments | Midstream & Marketing | Peaking | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 80 | 62 | 125 | 100 |
Operating Segments | Midstream & Marketing | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 2 | 2 | 4 | 4 |
Operating Segments | Midstream & Marketing | Electricity Generation | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 14 | 3 | 19 | 7 |
Operating Segments | Midstream & Marketing | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Operating Segments | Utilities | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 705 | 437 | 1,123 | 736 |
Other revenues | 2 | 5 | 3 | 6 |
Total revenues | 707 | 442 | 1,126 | 742 |
Operating Segments | Utilities | Total Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 705 | 437 | 1,123 | 736 |
Operating Segments | Utilities | Residential | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 400 | 243 | 634 | 408 |
Operating Segments | Utilities | Commercial & Industrial | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 167 | 96 | 261 | 156 |
Operating Segments | Utilities | Large delivery service | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 54 | 44 | 97 | 84 |
Operating Segments | Utilities | Off-system sales and capacity releases | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 77 | 47 | 118 | 76 |
Operating Segments | Utilities | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 7 | 7 | 13 | 12 |
Operating Segments | Utilities | Total Non-Utility | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Operating Segments | Utilities | Retail | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Operating Segments | Utilities | Wholesale | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Operating Segments | Utilities | Energy Marketing | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Operating Segments | Utilities | Pipeline | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Operating Segments | Utilities | Peaking | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Operating Segments | Utilities | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Operating Segments | Utilities | Electricity Generation | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenues from contracts with customers | 0 | 0 | 0 | 0 |
Operating Segments | 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 revenues | (5) | (1) | 5 | 2 |
Total revenues | (5) | (1) | 5 | 2 |
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 |