Utility Regulatory Assets and Liabilities and Regulatory Matters (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended				12 Months Ended			0 Months Ended
	Mar. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 01, 2010 mi	Sep. 30, 2013 Minimum [Member]	Sep. 30, 2013 Maximum [Member]	Sep. 30, 2013 UGI Central Penn Gas Inc [Member]	Oct. 03, 2012 Allentown, Pennsylvania Natural Gas Explosion [Member] UGI Utilities [Member]	Sep. 30, 2013 Revised Penalty [Member] Allentown Incident [Member] UGI Utilities [Member]
Regulatory Assets and Liabilities [Line Items]
Average remaining depreciable lives of the associated property					1 year	50 years
Unrealized gains (losses) on derivative financial instruments contracts		$ 1.7	$ 5.3
Fair value of electric utility electricity supply contracts		4.8	9.2
Minimum period to recover costs related to other regulatory assets		1 year
Maximum period to recover costs related to other regulatory assets		5 years
Damages paid									0
Accelerated Time Frame Replacing Remainder of Cast-Iron Mains								14 years
Loss Contingency, Agreement Permitted To Retain Current Timeframe for Replacing The Remainder of Their Bare Steel Mains								30 years
Additional base rate revenue using for increased distribution rates per settlement agreement							8.0
Increase in Base Rate Revenue for Energy and Efficiency Conservation Program							0.9
Reversal of Previous Increase in Base Rate Revenue for Energy and Efficiency Conservation Program							0.9
Net Book Value of Asset Transferred		2.6
Net book value of the storage facility assets			10.9
Term Period of Senior Facilities Agreement	1 year
Approval of the transfer length of natural gas pipeline (in miles)				9
Net book value of the Auburn line				$ 1.1