Segment Information (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Reportable_Segments	Jun. 30, 2011
Segment Reporting Information [Line Items]
Number of reportable segments (in reportable segments)			6
Loss on extinguishment of debt	$ 0.1	$ 0	$ (13.3)	$ (18.8)
Segment Information (Textual) [Abstract]
General Partner's interest in AmeriGas OLP (as a percent)	1.01%		1.01%
AmeriGas Propane [Member]
Segment Reporting Information [Line Items]
Loss on extinguishment of debt	$ 0.1	$ 0	$ (13.3)	$ (18.8)