Nature of Operations (Details) In Millions, except Share data, unless otherwise specified	6 Months Ended
	Mar. 31, 2012 Country	Oct. 14, 2011 Shell Acquisition [Member] USD ($)	Oct. 14, 2011 Shell Acquisition [Member] EUR (€)
Nature of Operations (Textual) [Abstract]
Business acquired by parent through subsidiaries for cash		$ 179.0	€ 133.6
Nature of Operations (Additional Textual) [Abstract]
General Partner held a general partner interest in AmeriGas Partners	1.00%
Percentage of limited partnership interest in AmeriGas Partners	25.40%
Effective ownership interest in AmeriGas OLP	27.10%
Limited Partnership Common Units held in AmeriGas Partners	23,756,882
General public as limited partner interests in AmeriGas Partners	73.60%
Common Units Owned by Public	39,437,073
Common Units Owned by ETP	29,567,882
Number of countries	11