Inventories (Details) - UGI Utilities $ in Millions, ft³ in Billions	12 Months Ended
	Sep. 30, 2015 USD ($) storage_agreement ft³	Sep. 30, 2014 USD ($) ft³
Public Utilities, Inventory
Storage agreement term (in years)	3 years
Storage Contract Administrative Agreements
Public Utilities, Inventory
Number of storage agreements	3
Volume of gas storage inventories released under SCAAs with non-affiliates (in cubic feet) | ft³	4.0	3.9
Carrying value of gas storage inventories released under SCAAs with non-affiliates | $	$ 9.8	$ 16.8