Decrease in earning per diluted share due to loss on extinguishment of debt.

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Decrease in earning per share diluted due to loss from discontinuance of cash flow hedge accounting treatment.

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Decrease in net income attributable to parent due to loss from discontinuance of cash flow hedge accounting treatment.

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Decrease in net income due to loss on extinguishment of debt.

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Decrease in operating income due to loss from discontinuance of cash flow hedge accounting treatment.

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Increase in earning per share diluted due to gain on sale.

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Increase in earning per share diluted due to provision for competition law clause.

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Increase in net income attributable to parent due to gain on sale.

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Increase in operating income due to competition law clause.

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Increase in operating income due to gain on sale.

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Quarterly Data Unaudited.

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Quarterly Data (Unaudited) (Details Textual) (USD $) In Millions, except Per Share data	3 Months Ended		12 Months Ended		3 Months Ended	12 Months Ended	15 Months Ended	3 Months Ended
	Sep. 30, 2011	Mar. 31, 2011	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2010 Atlantic Energy LLC [Member]	Sep. 30, 2010 Atlantic Energy LLC [Member]	Dec. 31, 2011 Antargaz [Member]	Mar. 31, 2010 Partnership IRPAs [Member]
Quarterly Data Unaudited (Textual)
Increase in operating income due to competition law clause							$ 9.4
Increase in earning per share diluted due to provision for competition law clause							$ 0.08
Decrease in net income due to loss on extinguishment of debt	5.2	5.2
Decrease in operating income due to loss from discontinuance of cash flow hedge accounting treatment								12.2
Decrease in net income attributable to parent due to loss from discontinuance of cash flow hedge accounting treatment								3.3
Decrease in earning per share diluted due to loss from discontinuance of cash flow hedge accounting treatment								$ 0.03
Decrease in earning per diluted share due to loss on extinguishment of debt	$ 0.05	$ 0.05
Increase in operating income due gain on sale					36.5	36.5
Increase in net income attributable to UGI Corp due to gain on sale			$ 17.2	$ 10.4	$ 17.2
Increase in earning per share diluted due to gain on sale			$ 0.16	$ 0.10	$ 0.16