Condensed Consolidated Statements of Partner's Capital (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Beginning Balance			$ 351,479	$ 392,886
Net income	(89,903)	(9,101)	89,069	186,229
Net (losses) gains on derivative instruments	(65,853)	1,248	(100,616)	26,525
Reclassification of net losses (gains) on derivative instruments	(14,625)	9,508	(33,791)	28,838
Distributions			(195,601)	(129,360)
Unit-based compensation expense			5,089	1,310
Common Units issued in connection with the Heritage Acquisitions			1,132,628
General Partners contribution to AmeriGas OLP in connection with the Heritage Acquisition
General Partners contribution to AmeriGas Partners, L.P in connection with the Heritage Acquisition
Common Units issued in connection with public offering			279,362
General Partner contribution to AmeriGas OLP			319	97
Common Units issued in connection with incentive compensation plans, net of tax withheld			(156)	(554)
Ending Balance	1,595,364	448,295	1,595,364	448,295
Common
Beginning Balance			340,180	372,220
Beginning Balance (in units)			57,124,296	57,088,509
Net income			77,400	178,410
Distributions			(181,877)	(122,794)
Unit-based compensation expense			5,089	1,310
Common Units issued in connection with the Heritage Acquisitions			1,132,628
Common Units issued in connection with the Heritage Acquisition (in units)			29,567,362
General Partners contribution to AmeriGas OLP in connection with the Heritage Acquisition			(28,357)
General Partners contribution to AmeriGas OLP in connection with the Heritage Acquisition (in units)			635,667
General Partners contribution to AmeriGas Partners, L.P in connection with the Heritage Acquisition			(13,323)
General Partners contribution to AmeriGas Partners, L.P in connection with the Heritage Acquisition (in units)			298,660
Common Units issued in connection with public offering			276,562
Common units sold in underwritten public offering (in units)			7,000,000
Common Units issued in connection with incentive compensation plans, net of tax withheld			(157)	(572)
Common Units issued in connection with incentive compensation plans, net of tax withheld (in units)			27,193	35,787
Ending Balance	1,608,145	428,574	1,608,145	428,574
Ending Balance (in units)	92,784,524	57,124,296	92,784,524	57,124,296
Noncontrolling interest
Beginning Balance			12,823	12,038
Net income			2,041	2,511
Net (losses) gains on derivative instruments			(1,009)	267
Reclassification of net losses (gains) on derivative instruments			(341)	295
Distributions			(3,040)	(1,820)
General Partners contribution to AmeriGas OLP in connection with the Heritage Acquisition			28,357
General Partner contribution to AmeriGas OLP			319	97
Ending Balance	39,832	12,798	39,832	12,798
Total AmeriGas Partners, L.P. partners' capital
Beginning Balance			338,656	380,848
Net income			87,028	183,718
Net (losses) gains on derivative instruments			(99,607)	26,258
Reclassification of net losses (gains) on derivative instruments			(33,450)	28,543
Distributions			(192,561)	(127,540)
Unit-based compensation expense			5,089	1,310
Common Units issued in connection with the Heritage Acquisitions			1,132,628
General Partners contribution to AmeriGas OLP in connection with the Heritage Acquisition			(28,357)
General Partners contribution to AmeriGas Partners, L.P in connection with the Heritage Acquisition
Common Units issued in connection with public offering			279,362
General Partner contribution to AmeriGas OLP
Common Units issued in connection with incentive compensation plans, net of tax withheld			(156)	(554)
Ending Balance	1,555,532	435,497	1,555,532	435,497
General partner
Beginning Balance			3,436	3,751
Net income			9,628	5,308
Distributions			(10,684)	(4,746)
General Partners contribution to AmeriGas Partners, L.P in connection with the Heritage Acquisition			13,323
Common Units issued in connection with public offering			2,800
Common Units issued in connection with incentive compensation plans, net of tax withheld			1	18
Ending Balance	18,504	4,331	18,504	4,331
Accumulated other comprehensive income (loss)
Beginning Balance			(4,960)	4,877
Net (losses) gains on derivative instruments			(99,607)	26,258
Reclassification of net losses (gains) on derivative instruments			(33,450)	(28,543)
Ending Balance	$ (71,117)	$ 2,592	$ (71,117)	$ 2,592