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Partnership Acquisition of Heritage Propane (Details 1) (Heritage Propane [Member], USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Heritage Propane [Member]
Partnership unaudited consolidated results of operations
Revenues	$ 2,023.2	$ 2,111.2
Net income attributable to UGI Corporation	$ 102.6	$ 85.4
Earnings per common share attributable to UGI Corporation stockholders:
Basic (in dollars per share)	$ 0.91	$ 0.76
Diluted (in dollars per share)	$ 0.90	$ 0.75

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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