Common Stock And Equity Based Compensation - UGI Performance Unit Award Activity (Details) (USD $)	12 Months Ended
	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2012
UGI Performance Units and Stock Units
UGI Unit Award Activity
Number of Equity-based Units - beginning balance (in units)	1,380,902
Granted	234,264		381,900	359,768
Number of Equity-based Units - ending balance (in units)	1,306,181		1,380,902
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value - beginning balance (in usd per unit)	$ 18.35
Granted	$ 31.38		$ 24.87	$ 18.45
Weighted Average Grant Date Fair Value - ending balance (in usd per unit)	$ 20.58		$ 18.35
UGI Performance Units
UGI Unit Award Activity
Granted	189,450
Forfeited	(7,200)
Vested	0
Unit awards paid	(267,146)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Granted	$ 32.32
Forfeited	$ 24.95
Vested	$ 0.00
Unit awards paid	$ 22.17
UGI Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Shares Granted under Stock Awards	approximately 70% in shares
UGI Unit Award Activity
Granted	44,814	[1]	51,038	63,668
Vested	0
Unit awards paid	(34,639)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Granted	$ 27.41	[1]
Vested	$ 0
Unit awards paid	$ 14.41
Vested | UGI Performance Units and Stock Units
UGI Unit Award Activity
Number of Equity-based Units - ending balance (in units)	781,231		822,975
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value - ending balance (in usd per unit)	$ 16.60		$ 15.45
Vested | UGI Performance Units
UGI Unit Award Activity
Granted	9,570
Forfeited	0
Vested	205,282
Unit awards paid	(267,146)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Granted	$ 32.02
Forfeited	$ 0.00
Vested	$ 21.15
Unit awards paid	$ 22.17
Vested | UGI Stock Units
UGI Unit Award Activity
Granted	43,689	[1]
Vested	1,500
Unit awards paid	(34,639)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Granted	$ 27.35	[1]
Vested	$ 22.29
Unit awards paid	$ 14.41
Non-Vested | UGI Performance Units and Stock Units
UGI Unit Award Activity
Number of Equity-based Units - ending balance (in units)	524,950		557,927
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value - ending balance (in usd per unit)	$ 26.51		$ 22.62
Non-Vested | UGI Performance Units
UGI Unit Award Activity
Granted	179,880
Forfeited	(7,200)
Vested	(205,282)
Unit awards paid	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Granted	$ 32.33
Forfeited	$ 24.95
Vested	$ 21.15
Unit awards paid	$ 0
Non-Vested | UGI Stock Units
UGI Unit Award Activity
Granted	1,125	[1]
Vested	(1,500)
Unit awards paid	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Granted	$ 29.84	[1]
Vested	$ 22.29
Unit awards paid	$ 0

[1] Generally, shares granted under UGI Stock Unit awards are paid approximately 70% in shares. UGI Stock Unit awards granted in Fiscal 2013 and Fiscal 2012 were 51,038 and 63,668, respectively.