v3.26.1
Debt - Narrative (Details)
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2026
USD ($)
May 31, 2026
USD ($)
May 31, 2026
EUR (€)
Oct. 31, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
May 31, 2026
EUR (€)
Nov. 30, 2025
USD ($)
Sep. 30, 2025
USD ($)
Jul. 31, 2025
USD ($)
Debt Instrument [Line Items]                        
Loss on extinguishments of debt         $ 15,000,000 $ 10,000,000 $ 15,000,000 $ 10,000,000        
Proceeds from short-term debt             1,809,000,000          
Repayments of short-term debt             1,958,000,000          
AmeriGas Partners                        
Debt Instrument [Line Items]                        
Proceeds from contributions from parent   $ 300,000,000                    
Senior Notes Due 2031 | Senior Notes | AmeriGas Partners And AmeriGas Finance Corps                        
Debt Instrument [Line Items]                        
Principal amount   $ 500,000,000                    
Interest rate   6.875%             6.875%      
Senior Notes Due 2031 | Senior Notes | AmeriGas Partners                        
Debt Instrument [Line Items]                        
Interest rate   6.875%             6.875%      
Senior Notes Due 2031 | Senior Notes | UGI International                        
Debt Instrument [Line Items]                        
Principal amount | €                 € 300,000,000      
Interest rate   5.00%             5.00%      
Senior Notes Due 2027 | Senior Notes | AmeriGas Partners                        
Debt Instrument [Line Items]                        
Interest rate   5.75%             5.75%      
Repayments of secured debt   $ 512,000,000                    
Senior Notes Due 2028 | Senior Notes | AmeriGas Partners                        
Debt Instrument [Line Items]                        
Interest rate   9.375%             9.375%      
Repayments of secured debt   $ 175,000,000                    
Senior Notes Due June 2026 | Senior Notes | AmeriGas Partners                        
Debt Instrument [Line Items]                        
Principal amount $ 318,000,000       $ 318,000,000   $ 318,000,000          
Interest rate 9.375%       9.375%   9.375%          
Senior Notes Due June 2026 | Senior Notes | Utilities                        
Debt Instrument [Line Items]                        
Interest rate 2.95%       2.95%   2.95%         1.59%
Repayments of secured debt $ 100,000,000       $ 100,000,000   $ 100,000,000         $ 100,000,000
Intercompany Loan | Senior Notes | AmeriGas Partners                        
Debt Instrument [Line Items]                        
Repayments of secured debt   $ 150,000,000                    
UGI International Senior Notes | Senior Notes | UGI International                        
Debt Instrument [Line Items]                        
Principal amount | €                 € 230,000,000      
UGI International Senior Notes | Credit Agreement | UGI International                        
Debt Instrument [Line Items]                        
Principal balance | €     € 70,000,000                  
Senior Notes Due 2030 | Senior Notes | Utilities                        
Debt Instrument [Line Items]                        
Principal amount                   $ 150,000,000    
Interest rate                   5.10%    
Conversion ratio             0.0362319          
Default conversion settlement ratio             1          
Senior Notes Due 2035 | Senior Notes | Utilities                        
Debt Instrument [Line Items]                        
Principal amount                       $ 125,000,000
Interest rate                       5.68%
Senior Notes Due September 2026 | Senior Notes | Utilities                        
Debt Instrument [Line Items]                        
Interest rate                       1.64%
Repayments of secured debt                       $ 75,000,000
UGI Energy Services Amended Term Loan Credit Agreement | Credit Agreement | SOFR                        
Debt Instrument [Line Items]                        
Basis spread on variable rate 2.00%                      
UGI Energy Services Amended Term Loan Credit Agreement | Credit Agreement | Base Rate                        
Debt Instrument [Line Items]                        
Basis spread on variable rate 1.00%                      
Energy Services Accounts Receivable Securitization Facility | Energy Services | Receivables Facility                        
Debt Instrument [Line Items]                        
Option to increase       $ 50,000,000                
Energy Services Accounts Receivable Securitization Facility | Energy Services | Period October 18, 2024 to April 30, 2025 | Receivables Facility                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity       150,000,000                
Energy Services Accounts Receivable Securitization Facility | Energy Services | Period May 1, 2025 to October 17, 2025 | Receivables Facility                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity       $ 75,000,000                
UGI Corporation Senior Notes | Senior Notes                        
Debt Instrument [Line Items]                        
Principal amount $ 700,000,000       $ 700,000,000   $ 700,000,000          
Interest rate 5.00%       5.00%   5.00%          
Interest expense         $ 10,000,000 $ 10,000,000 $ 30,000,000 $ 30,000,000        
Effective interest rate (as a percentage)         5.68% 5.68% 5.68% 5.68%        
UGI Corporation Senior Notes | Senior Notes | Level 2                        
Debt Instrument [Line Items]                        
Long-term debt $ 944,000,000       $ 944,000,000   $ 944,000,000       $ 894,000,000  
UGI Corporation Senior Notes | Senior Notes | AmeriGas Partners                        
Debt Instrument [Line Items]                        
Loss on extinguishments of debt         $ 15,000,000              
AmeriGas Partners Senior Notes | Senior Notes | AmeriGas Partners                        
Debt Instrument [Line Items]                        
Interest rate           5.875%   5.875%        
Principal balance           $ 664,000,000