Inventories (Details) - UGI Utilities $ in Millions	6 Months Ended
	Mar. 31, 2016 USD ($) storage_agreement Bcf	Sep. 30, 2015 USD ($) Bcf	Mar. 31, 2015 USD ($) Bcf
Inventory
SCAA contract term (in years)	3 years
Storage Contract Administrative Agreements
Inventory
Number of storage agreements | storage_agreement	2
Volume of gas storage inventories released under SCAAs with non-affiliates (in cubic feet) | Bcf	0.2	4.0	0.2
Carrying value of gas storage inventories released under SCAAs with non-affiliates | $	$ 0.5	$ 9.8	$ 0.7