Partnership Acquisition of Heritage Propane (Details 1) (Heritage Propane [Member], USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Heritage Propane [Member]
Partnership unaudited consolidated results of operations
Revenues	$ 1,277.2	$ 1,335.6	$ 5,885.2	$ 6,257.8
Net income attributable to UGI Corporation	$ (6.3)	$ (14.0)	$ 211.4	$ 253.9
Earnings per common share attributable to UGI Corporation stockholders:
Basic (in dollars per share)	$ (0.06)	$ (0.12)	$ 1.88	$ 2.28
Diluted (in dollars per share)	$ (0.06)	$ (0.12)	$ 1.87	$ 2.25