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Series Preferred Stock (Details) - shares
Sep. 30, 2017
Sep. 30, 2016
Class of Stock [Line Items]    
Preferred Stock, shares authorized 10,000,000  
Preferred Stock, shares outstanding 0 0
UGI Utilities    
Class of Stock [Line Items]    
Preferred Stock, shares authorized 2,000,000  
Preferred Stock, shares outstanding 0 0