Nature of Operations (Details Textuals)	12 Months Ended
	Sep. 30, 2011 Year Years Employee Customers State lb
General Partners Interest [Line Items]
General Partners Ownership Interest in AmeriGas OLP	1.01%
Nature of Operations (Textuals) [Abstract]
Number of states in which the company has market share	50
Common units held by the general partner and its wholly owned subsidiary Petrolane Incorporated	24,691,209
Common Units held by public	32,433,087
Limited partner interest held by AmeriGas Partners in AmeriGas OLP	99.00%
Subsidiary of Limited Partnership general partner interest	0.10%
Subsidiary of Limited Partnership Limited partner interest	99.90%
Employees of the AmeriGas Partners and the Operating Partnerships	0
AmeriGas Propane Inc Partnership Interest In AmeriGas Partners [Member]
General Partners Interest [Line Items]
General Partners Ownership Interest in AmeriGas OLP	1.00%
AmeriGas Propane Inc Partnership Interest In AmeriGas OLP [Member]
General Partners Interest [Line Items]
General Partners Ownership Interest in AmeriGas OLP	1.01%