Common Stock And Equity Based Compensation (Details 5) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
UGI Performance Units [Member]
Payment to UGI Performance Units and UGI Stock Unit awards in share and cash:
Number of original awards granted	218,683	210,750	197,917
Fiscal year granted	2010	2009	2008
Payment of Awards:
Shares of UGI Common Stock issued	65,081	0	142,494
Cash Paid	$ 1.6	$ 0	$ 7.5
UGI Stock Units [Member]
Payment to UGI Performance Units and UGI Stock Unit awards in share and cash:
Number of original awards granted	36,179	32,898	22,400
Payment of Awards:
Shares of UGI Common Stock issued	23,516	21,757	17,545
Cash Paid	$ 0.5	$ 0.2	$ 0.2