Segment Information (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Reconciliation of partnership EBITDA
Depreciation and amortization	$ (87.1)		$ (60.3)
Operating income (loss)	296.1		188.3
AmeriGas Propane [Member]
Reconciliation of partnership EBITDA
Partnership EBITDA	187.8	[1]	83.7	[1]
Depreciation and amortization	(49.4)		(24.2)
Noncontrolling interests	1.5	[2]	0.6	[2]
Operating income (loss)	$ 139.9		$ 60.1

[1] The following table provides a reconciliation of Partnership EBITDA to AmeriGas Propane operating income:Three Months Ended December 31, 2012 2011Partnership EBITDA $187.8 $83.7Depreciation and amortization (49.4) (24.2)Noncontrolling interests (i) 1.5 0.6Operating income $139.9 $60.1

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