Segment Information (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Mar. 31, 2013		Mar. 31, 2012		Mar. 31, 2013		Mar. 31, 2012
Reconciliation of partnership EBITDA
Depreciation and amortization	$ (87.3)		$ (82.8)		$ (174.4)		$ (143.1)
Loss on extinguishment of debt	0		13.4		0		13.4
Operating income	486.2		380.8		782.3		569.1
AmeriGas Propane [Member]
Reconciliation of partnership EBITDA
Partnership EBITDA	303.6	[1]	224.5	[1]	491.4	[2]	308.2	[2]
Depreciation and amortization	(48.6)		(44.8)		(98.0)		(69.0)
Loss on extinguishment of debt	0		13.4		0		13.4
Noncontrolling interests	2.4	[3]	1.9	[3]	3.9	[3]	2.5	[3]
Operating income	$ 257.4		$ 195.0		$ 397.3		$ 255.1

[1] The following table provides a reconciliation of Partnership EBITDA to AmeriGas Propane operating income:Three Months Ended March 31, 2013 2012Partnership EBITDA $303.6 224.5Depreciation and amortization (48.6) (44.8)Loss on extinguishments of debt — 13.4Noncontrolling interests (i) 2.4 1.9Operating income $257.4 $195.0(i)Principally represents the General Partner’s 1.01% interest in AmeriGas OLP.

[2] The following table provides a reconciliation of Partnership EBITDA to AmeriGas Propane operating income:Six Months Ended March 31, 2013 2012Partnership EBITDA $491.4 $308.2Depreciation and amortization (98.0) (69.0)Loss on extinguishments of debt — 13.4Noncontrolling interests (i) 3.9 2.5Operating income $397.3 $255.1(i)Principally represents the General Partner’s 1.01% interest in AmeriGas OLP.

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