v3.25.1
Revenue from Contracts with Customers - Disaggregated Revenues by Reportable Segment (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers $ 2,633 $ 2,411 $ 4,621 $ 4,485
Other revenues 33 56 75 103
Total revenues 2,666 2,467 4,696 4,588
Total Utility        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 716 594 1,176 1,063
Residential        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 434 353 710 635
Commercial & Industrial        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 176 144 281 252
Large delivery service        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 64 54 116 103
Off-system sales and capacity releases        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 34 32 53 53
Other        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 8 11 16 20
Total Non-Utility        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 1,917 1,817 3,445 3,422
Retail        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 1,313 1,267 2,384 2,324
Wholesale        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 78 89 150 160
Energy Marketing        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 370 311 622 638
Pipeline        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 59 65 117 130
Peaking        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 23 8 24 11
Other        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 6 4 10 7
Electricity Generation        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers   6   14
Other        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 68 67 138 138
Eliminations        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers (190) (131) (276) (211)
Other revenues 0 0 0 0
Total revenues (190) (131) (276) (211)
Eliminations | Total Utility        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers (46) (24) (61) (36)
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 (46) (24) (61) (36)
Eliminations | Other        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 0 0 0 0
Eliminations | Total Non-Utility        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers (144) (107) (215) (175)
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 (82) (38) (113) (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 (62) (69) (102) (111)
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
Eliminations | Other        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 0 0 0 0
Eliminations | Utilities        
Disaggregation of Revenue [Line Items]        
Total revenues 46 23 61 36
Eliminations | Midstream & Marketing        
Disaggregation of Revenue [Line Items]        
Total revenues 144 108 215 175
Eliminations | UGI International        
Disaggregation of Revenue [Line Items]        
Total revenues 0 0 0 0
Eliminations | AmeriGas Propane        
Disaggregation of Revenue [Line Items]        
Total revenues 0 0 0 0
Operating Segments | Utilities        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 762 618 1,237 1,099
Other revenues 11 28 21 40
Total revenues 773 646 1,258 1,139
Operating Segments | Utilities | Total Utility        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 762 618 1,237 1,099
Operating Segments | Utilities | Residential        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 434 353 710 635
Operating Segments | Utilities | Commercial & Industrial        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 176 144 281 252
Operating Segments | Utilities | Large delivery service        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 64 54 116 103
Operating Segments | Utilities | Off-system sales and capacity releases        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 80 56 114 89
Operating Segments | Utilities | Other        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 8 11 16 20
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
Operating Segments | Utilities | Other        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 0 0 0 0
Operating Segments | Midstream & Marketing        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 587 484 954 877
Other revenues 0 (1) 0 0
Total revenues 587 483 954 877
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 587 484 954 877
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 437 332 701 604
Operating Segments | Midstream & Marketing | Pipeline        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 59 65 117 130
Operating Segments | Midstream & Marketing | Peaking        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 85 77 126 122
Operating Segments | Midstream & Marketing | Other        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 6 4 10 7
Operating Segments | Midstream & Marketing | Electricity Generation        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers   6   14
Operating Segments | Midstream & Marketing | Other        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 0 0 0 0
Operating Segments | UGI International        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 641 663 1,268 1,378
Other revenues 9 10 20 20
Total revenues 650 673 1,288 1,398
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 641 663 1,268 1,378
Operating Segments | UGI International | Retail        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 564 570 1,102 1,094
Operating Segments | UGI International | Wholesale        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 43 60 93 109
Operating Segments | UGI International | Energy Marketing        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 15 17 34 140
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
Operating Segments | UGI International | Other        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 19 16 39 35
Operating Segments | AmeriGas Propane        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 833 777 1,438 1,384
Other revenues 15 18 37 40
Total revenues 848 795 1,475 1,424
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 833 777 1,438 1,384
Operating Segments | AmeriGas Propane | Retail        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 749 697 1,282 1,230
Operating Segments | AmeriGas Propane | Wholesale        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 35 29 57 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
Operating Segments | AmeriGas Propane | Other        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 49 51 99 103
Corporate & Other        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers 0 0 0 (42)
Other revenues (2) 1 (3) 3
Total revenues (2) 1 (3) (39)
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 (42)
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 (42)
Reduction in revenue       42
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
Corporate & Other | Other        
Disaggregation of Revenue [Line Items]        
Total revenues from contracts with customers $ 0 $ 0 $ 0 $ 0