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Debt - Narrative (Details)
Oct. 25, 2018
EUR (€)
Oct. 25, 2018
USD ($)
Oct. 18, 2018
EUR (€)
Feb. 01, 2019
USD ($)
Nov. 30, 2018
UGI International Credit Agreement          
Debt Instrument [Line Items]          
Debt instrument, covenant, total indebtedness to EBITDA ratio, maximum     3.85    
UGI International LLC | Senior Notes | 3.25% Senior Unsecured Notes Due November 2025          
Debt Instrument [Line Items]          
Stated interest rate 3.25%        
Debt instrument, face amount € 350,000,000        
UGI France          
Debt Instrument [Line Items]          
Repayment of debt 540,000,000        
Flaga          
Debt Instrument [Line Items]          
Repayment of debt 45,800,000        
Flaga | Term Loan | Flaga Term Loan Due September 2020          
Debt Instrument [Line Items]          
Repayment of debt | $   $ 49,900,000      
France SAS          
Debt Instrument [Line Items]          
Long-term debt € 60,000,000        
UGI Utilities | Senior Notes | 4.55% Senior Notes due February 2049 | Subsequent Event          
Debt Instrument [Line Items]          
Stated interest rate       4.55%  
Debt instrument, face amount | $       $ 150,000,000  
Debt instrument, covenant, consolidated debt to consolidated total capital       0.65  
Minimum | UGI International LLC | Line of Credit | UGI International Credit Agreement          
Debt Instrument [Line Items]          
Basis spread on variable rate     1.55%    
Maximum | UGI International LLC | Line of Credit | UGI International Credit Agreement          
Debt Instrument [Line Items]          
Basis spread on variable rate     3.20%    
Term Loan | UGI International LLC | Line of Credit | UGI International Credit Agreement          
Debt Instrument [Line Items]          
Debt instrument, term (in years)     5 years    
Long-term debt     € 300,000,000    
Revolving Credit Facility | UGI International LLC | Line of Credit | UGI International Credit Agreement          
Debt Instrument [Line Items]          
Maximum borrowing capacity     € 300,000,000    
EURIBOR | Revolving Credit Facility | UGI International LLC | Line of Credit | UGI International Credit Agreement          
Debt Instrument [Line Items]          
Basis spread on variable rate     1.70%    
Derivative, fixed interest rate     0.34%   0.34%
EURIBOR | Revolving Credit Facility | Minimum | UGI International LLC | Line of Credit | UGI International Credit Agreement          
Debt Instrument [Line Items]          
Basis spread on variable rate     1.20%    
EURIBOR | Revolving Credit Facility | Maximum | UGI International LLC | Line of Credit | UGI International Credit Agreement          
Debt Instrument [Line Items]          
Basis spread on variable rate     2.85%    
London Interbank Offered Rate (LIBOR) | Revolving Credit Facility | Minimum | UGI International LLC | Line of Credit | UGI International Credit Agreement          
Debt Instrument [Line Items]          
Basis spread on variable rate     1.45%    
London Interbank Offered Rate (LIBOR) | Revolving Credit Facility | Maximum | UGI International LLC | Line of Credit | UGI International Credit Agreement          
Debt Instrument [Line Items]          
Basis spread on variable rate     3.10%