Common Stock And Equity Based Compensation (Details 5) (USD $) In Millions, except Share data	12 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
UGI Performance Units [Member]
Payment to UGI Performance Units and UGI Stock Unit awards in share and cash:
Number of original awards granted	197,917	193,983	163,450
Fiscal year granted	2008	2007	2006
Payment of Awards:
Shares of UGI Common Stock issued	142,494	123,169	117,847
Cash Paid	$ 7.5	$ 2.6	$ 3.1
UGI Stock Units [Member]
Payment to UGI Performance Units and UGI Stock Unit awards in share and cash:
Number of original awards granted	22,400		88,449
Payment of Awards:
Shares of UGI Common Stock issued	17,545		58,376
Cash Paid	$ 0.2		$ 0.8

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Aggregate cash paid by the entity during the period to settle equity instruments granted under equity-based payment arrangements.

+ References

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The number of shares newly issued during the reporting period under the plan.

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