Partnership Acquisition of Heritage Propane (Details 1) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Partnership unaudited consolidated results of operations
Net income attributable to UGI Corporation	$ 171.9	$ 133.4	$ 274.5	$ 220.4
Earnings Per Share, Basic	$ 1.51	$ 1.19	$ 2.42	$ 1.96
Earnings per common share attributable to UGI Corporation stockholders:
Earnings Per Share, Diluted	$ 1.49	$ 1.18	$ 2.39	$ 1.95
Heritage Propane [Member]
Heritage Acquisition [Line Items]
Revenues	2,537.1		4,560.3
Partnership unaudited consolidated results of operations
Revenues		2,496.8		4,608.0
Net income attributable to UGI Corporation	171.9		274.5
Net income attributable to UGI Corporation		$ 133.4		$ 218.8
Earnings Per Share, Basic	$ 1.51		$ 2.42
Earnings per common share attributable to UGI Corporation stockholders:
Basic (in dollars per share)		$ 1.19		$ 1.95
Earnings Per Share, Diluted	$ 1.49		$ 2.39
Diluted (in dollars per share)		$ 1.18		$ 1.93