Common Stock and Equity Based Compensation (Tables)

12 Months Ended

Sep. 30, 2011

Common Stock and Equity-Based Compensation [Abstract]

Common stock share activity

	Issued		Treasury			Outstanding
Balance, September 30, 2008		115,247,694		(7,386,732	)		107,860,962
Issued:
Employee and director plans		13,600		776,074			789,674
Dividend reinvestment plan		—		96,071			96,071
Balance, September 30, 2009		115,261,294		(6,514,587	)		108,746,707
Issued:
Employee and director plans		139,000		1,390,207			1,529,207
Dividend reinvestment plan		—		97,673			97,673
Balance, September 30, 2010		115,400,294		(5,026,707	)		110,373,587
Issued:
Employee and director plans		106,800		1,263,065			1,369,865
Dividend reinvestment plan		—		92,570			92,570
Balance, September 30, 2011		115,507,094		(3,671,072	)		111,836,022

Stock Option Awards

								Weighted
				Weighted		Total		Average
				Average		Intrinsic		Contract Term
	Shares			Option Price		Value		(Years)
Shares under option — September 30, 2008		6,652,245		$	21.71	$	30.9		6.6
Granted		1,411,200		$	24.65
Cancelled		(87,334	)	$	25.81
Exercised		(474,618	)	$	13.30	$	6.0
Shares under option — September 30, 2009		7,501,493		$	22.74	$	23.2		6.4
Granted		1,394,300		$	24.37
Cancelled		(62,501	)	$	25.12
Exercised		(1,276,247	)	$	18.09	$	11.7
Shares under option — September 30, 2010		7,557,045		$	23.81	$	36.2		6.5
Granted		1,443,558		$	31.55
Cancelled		(235,437	)	$	27.79
Exercised		(1,091,987	)	$	20.95	$	11.4
Shares under option — September 30, 2011		7,673,179		$	25.55	$	15.1		6.2
Options exercisable — September 30, 2009		4,744,054		$	21.00
Options exercisable — September 30, 2010		4,706,376		$	22.99
Options exercisable — September 30, 2011		4,879,784		$	24.15	$	12.7		5.2
Non-vested options — September 30, 2011		2,793,395		$	27.99	$	2.4		8.0

Additional information relating to stock options outstanding and exercisable

	Range of exercise prices
	Under		$20.00 -		$25.01 -		Over
	$20.00		$25.00		$30.00		$30.00
Options outstanding at September 30, 2011:
Number of options		336,300		3,539,727		2,456,694		1,340,458
Weighted average remaining contractual life (in years)		1.9		6.0		5.7		8.7
Weighted average exercise price	$	15.42	$	23.05	$	27.24	$	31.59
Options exercisable at September 30, 2011:
Number of options		336,300		2,351,093		2,124,391		68,000
Weighted average exercise price	$	15.42	$	22.44	$	27.19	$	31.74

Assumption used for valuing option grants

	2011			2010			2009
Expected life of option	5.75 years			5.75 years			5.75 years
Weighted average volatility		24.3	%		24.0	%		23.7	%
Weighted average dividend yield		3.4	%		3.3	%		3.0	%
Expected volatility		23.8% - 24.3	%		24.0	%		20.3% - 23.7	%
Expected dividend yield		3.1% - 3.4	%		3.3% - 3.4	%		2.9% - 3.2	%
Risk free rate		1.2% - 2.4	%		1.7% - 3.1	%		1.7% - 3.0	%

Weighted average assumptions used to determine the fair value of UGI Performance Unit awards and related compensation costs

	Grants Awarded in Fiscal
	2011			2010			2009
Risk free rate		1.0	%		1.7	%		1.0	%
Expected life	3 years			3 years			3 years
Expected volatility		27.6	%		28.0	%		27.1	%
Dividend yield		3.2	%		3.3	%		3.2	%

UGI unit award activity

	Total					Vested					Non-Vested
				Weighted					Weighted					Weighted
				Average					Average					Average
	Number of			Grant Date		Number of			Grant Date		Number of			Grant Date
	UGI			Fair Value		UGI			Fair Value		UGI			Fair Value
	Units			(per Unit)		Units			(per Unit)		Units			(per Unit)
September 30, 2010		930,493		$	22.99		570,835		$	21.27		359,658		$	25.71
UGI Performance Units:
Granted		223,525		$	35.19		—		$	—		223,525		$	35.19
Forfeited		(77,906	)	$	30.18		—		$	—		(77,906	)	$	30.18
Vested		—		$	—		198,749		$	28.84		(198,749	)	$	28.84
Unit awards paid		(185,374	)	$	30.17		(185,374	)	$	30.17		—		$	—
Performance criteria not met		—		$	—		—		$	—		—		$	—
UGI Stock Units:
Granted(a)		61,945		$	33.31		—		$	—		61,945		$	33.31
Forfeited		(30,600	)	$	34.88		—		$	—		(30,600	)	$	34.88
Vested		—		$	—		36,545		$	30.54		(36,545	)	$	30.54
Unit awards paid		(21,800	)	$	26.37		(21,800	)	$	26.37		—		$	—
September 30, 2011		900,283		$	24.13		598,955		$	21.41		301,328		$	29.56

(a) Generally, shares granted under UGI Stock Unit awards are paid approximately 70% in shares. UGI Stock Unit awards granted in Fiscal 2010 and Fiscal 2009 were 27,060 and 52,767, respectively.

Schedule of Payment for UGI Performance Unit and UGI Stock Unit awards in shares and cash

	2011		2010		2009
UGI Performance Unit awards:
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 Unit awards:
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

Weighted Average Assumption used to determine the fair value of AmeriGas Performance unit Awards and related compensation costs

	Grants Awarded in Fiscal
	2011			2010			2009
Risk-free rate		1.0	%		1.7	%		1.0	%
Expected life	3 years			3 years			3 years
Expected volatility		34.6	%		35.0	%		32.0	%
Dividend yield		5.8	%		6.8	%		9.1	%

AmeriGas Common Unit based award activity

	Total					Vested					Non-Vested
	Number of					Number of					Number of
	AmeriGas					AmeriGas					AmeriGas
	Partners			Weighted		Partners			Weighted		Partners			Weighted
	Common			Average		Common			Average		Common			Average
	Units			Grant Date		Units			Grant Date		Units			Grant Date
	Subject			Fair Value		Subject			Fair Value		Subject			Fair Value
	to Award			(per Unit)		to Award			(per Unit)		to Award			(per Unit)
September 30, 2010		146,600		$	37.05		53,851		$	37.14		92,749		$	37.00
Granted		49,287		$	53.19		—		$	—		49,287		$	53.19
Forfeited		(2,967	)	$	35.41		—		$	—		(2,967	)	$	35.41
Vested		—		$	—		46,351		$	39.88		(46,351	)	$	39.88
Awards paid		(37,564	)	$	38.75		(37,564	)	$	38.75		—		$	—
September 30, 2011		155,356		$	41.79		62,638		$	38.20		92,718		$	44.22

AmeriGas Common Unit Based Awards In Common Units And Cash

	2011		2010		2009
Number of Common Units subject to original Awards granted		41,064		49,650		38,350
Fiscal year granted		2008		2007		2006
Payment of Awards:
AmeriGas Partners Common Units issued		35,787		42,121		36,437
Cash paid	$	1.2	$	1.2	$	0.9