Segment Information (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended														12 Months Ended
	Sep. 30, 2012		Jun. 30, 2012	Mar. 31, 2012		Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011	Mar. 31, 2011		Dec. 31, 2010		Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2010
Reconciliation of partnership EBITDA
Depreciation and amortization															$ (316.0)		$ (227.9)		$ (210.2)
Loss on extinguishments of debt	0	[1]	(0.1)	13.4	[2]	0	[3]	19.3	[1]	0	18.8	[4]	0	[5]	13.3		38.1
Operating income	(28.6)	[1]	(19.2)	380.8	[2]	188.3	[3]	(10.5)	[1]	17.2	357.0	[4]	252.3	[5]	521.3		616.0		659.2
AmeriGas Propane [Member]
Reconciliation of partnership EBITDA
Partnership EBITDA															324.7	[6]	297.1	[6]	321.0	[6]
Depreciation and amortization															(169.1)		(94.7)		(87.4)
Loss on extinguishments of debt															13.3		38.1
Noncontrolling interests															1.4	[7]	2.4	[7]	2.2	[7]
Operating income															$ 170.3		$ 242.9		$ 235.8

[1] Includes loss on extinguishment of Partnership long-term debt which increased net loss attributable to UGI Corporation by $5.2 or $0.05 per diluted share (see Note 5).

[2] Includes loss on extinguishment of Partnership long-term debt which decreased net income attributable to UGI Corporation by $2.2 or $0.02 per diluted share (see Note 5).

[3] Includes adjustment to foreign tax credit valuation allowance which increased net income by $5.5 or $0.05 per diluted share.

[4] Includes loss on extinguishment of Partnership long-term debt which decreased net income attributable to UGI Corporation by $5.2 or $0.05 per diluted share (see Note 5).

[5] Includes the reversal of previously recorded nontaxable accrual associated with the Antargaz Competition Authority Matter which increased operating income and net income attributable to UGI Corporation by $9.4 or $0.08 per diluted share (see Note 15).

[6] The following table provides a reconciliation of Partnership EBITDA to AmeriGas Propane operating income:Year ended September 30, 2012 2011 2010 Partnership EBITDA $324.7 $297.1 $321.0 Depreciation and amortization (169.1) (94.7) (87.4) Loss on extinguishments of debt 13.3 38.1 — Noncontrolling interests (i) 1.4 2.4 2.2 Operating income $170.3 $242.9 $235.8 (i)Principally represents the General Partner’s 1.01% interest in AmeriGas OLP.

[7] Principally represents the General Partner’s 1.01% interest in AmeriGas OLP.