Related Party Transactions (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended																		0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2014 UGI Energy Services, Inc	Sep. 30, 2013 UGI Energy Services, Inc	Sep. 30, 2011 UGI Energy Services, Inc	Sep. 30, 2014 SCAAs UGI Energy Services, Inc storage_agreement	Sep. 30, 2013 SCAAs UGI Energy Services, Inc	Sep. 30, 2011 SCAAs UGI Energy Services, Inc	Sep. 30, 2014 Exclusive of Transactions Pursuant SCAAs UGI Energy Services, Inc	Sep. 30, 2013 Exclusive of Transactions Pursuant SCAAs UGI Energy Services, Inc	Sep. 30, 2011 Exclusive of Transactions Pursuant SCAAs UGI Energy Services, Inc	Sep. 30, 2014 Other Current Liabilities SCAAs UGI Energy Services, Inc	Sep. 30, 2013 Other Current Liabilities SCAAs UGI Energy Services, Inc	Sep. 30, 2014 Inventories UGI Energy Services, Inc ft3	Sep. 30, 2013 Inventories UGI Energy Services, Inc ft3	Sep. 30, 2014 SCAAs storage_agreement	Sep. 30, 2014 UGI Energy Services, Inc SCAAs storage_agreement	Nov. 01, 2014 UGI Energy Services, Inc SCAAs Subsequent Event	Nov. 01, 2014 UGI Energy Services, Inc SCAAs Subsequent Event storage_agreement	Oct. 31, 2014 UGI Energy Services, Inc SCAAs Subsequent Event storage_agreement	Oct. 31, 2015 Forecast UGI Energy Services, Inc SCAAs storage_agreement
Related Party Transaction
Number of storage agreements							3										4	3		1
Number of Storage Agreements Expiring																					1	2
Related party costs incurred	$ 10,671	$ 8,366	$ 9,326				$ 38,299	$ 45,843	$ 24,344	$ 35,810	$ 32,526	$ 30,752
Related party security deposits													10,600	16,500
Storage agreement, term (in years)																			1 year
Volume of gas storage inventory (in bcf of natural gas)															7,700,000,000	10,400,000,000
Natural gas storage inventory, related parties, current															33,057	41,988
Revenue from related parties				109,913	69,087	65,705
Purchases from related party				$ 128,076	$ 77,017	$ 53,435