Commitments and Contingencies (Details Textual) (USD $) In Millions, unless otherwise specified	9 Months Ended					12 Months Ended
	Jun. 30, 2013 Environmental matters [Member]	Jun. 30, 2013 Environmental matters [Member] CPG MGP [Member]	Jun. 30, 2013 Environmental matters [Member] PNG MGP [Member]	Jun. 30, 2013 CPG and PNG COAs [Member] UGI Utilities [Member]	Jun. 30, 2012 CPG and PNG COAs [Member] UGI Utilities [Member]	Sep. 30, 2008 CA cylinder investigation [Member] Partnership [Member] lb	Sep. 30, 2008 FTC Investigation [Member] Partnership [Member] lb	Jun. 30, 2013 BP Matter [Member] Partnership [Member] Customer
Commitments and Contingencies [Line Items]
Environmental expenditures cap during calendar year		$ 1.8	$ 1.1
Accrual for environmental loss contingencies				$ 14.4	$ 15.8
Base year for determination of investigation and remediation cost (in years)	5 years
Amount of propane in cylinders before reduction (in pounds)						17	17
Amount of propane in cylinders after reduction (in pounds)						15	15
Alleged number of residential customers (in customers)								400