Consolidated Statements Of Partners' Capital (USD $)	Ferrellgas Partners Finance Corp. [Member] Common Stock [Member]	Ferrellgas Partners Finance Corp. [Member] Additional Paid In Capital [Member]	Ferrellgas Partners Finance Corp. [Member] Accumulated Deficit [Member]	Ferrellgas Partners Finance Corp. [Member]	Ferrellgas, L.P. [Member] Common Unitholders [Member]	Ferrellgas, L.P. [Member] General Partner [Member]	Ferrellgas, L.P. [Member] Accumulated Other Comprehensive Income	Ferrellgas, L.P. [Member]	Ferrellgas Finance Corp. [Member] Common Stock [Member]	Ferrellgas Finance Corp. [Member] Additional Paid In Capital [Member]	Ferrellgas Finance Corp. [Member] Accumulated Deficit [Member]	Ferrellgas Finance Corp. [Member]	Common Unitholders [Member]	General Partner [Member]	Accumulated Other Comprehensive Income	Total Ferrellgas Partners, L.P. Partners' Capital [Member]	Non-Controlling Interest [Member]	Total
Value at Jul. 31, 2009	$ 1,000	$ 5,594	$ (5,594)	$ 1,000					$ 1,000	$ 6,757	$ (6,657)	$ 1,100
Value at Jul. 31, 2009					418,532,000	4,272,000	(1,194,000)	421,610,000					206,255,000	(57,988,000)	(1,194,000)	147,073,000	4,272,000	151,345,000
Shares at Jul. 31, 2009													68,236,800	689,300
Shares at Jul. 31, 2009	1,000								1,000
Capital contribution		537		537						20,462		20,462
Contributions in connection with non-cash ESOP and stock and unit-based compensation charges					16,980,000	173,000		17,153,000					16,810,000	170,000		16,980,000	173,000	17,153,000
Distributions					(191,822,000)	(1,958,000)		(193,780,000)					(138,365,000)	(1,398,000)		(139,763,000)	(1,958,000)	(141,721,000)
Common units issued in connection with acquisitions - shares													155,100	1,500
Common units issued in connection with acquisitions - value					3,061,000	31,000		3,092,000					3,061,000	31,000		3,092,000	31,000	3,123,000
Common unit options issued - shares													71,500	700
Common unit options issued - value													1,189,000	12,000		1,201,000	8,000	1,209,000
Common units issued in offering, net of issuance costs - shares													1,058,400	10,700
Common units issued in offering, net of issuance costs - value													19,949,000	202,000		20,151,000	204,000	20,355,000
Cash contributed by Ferrellgas Partners and general partner					51,300,000	523,000		51,823,000									311,000	311,000
Comprehensive income (loss):
Net earnings (loss)			(568)	(568)	61,731,000	630,000		62,361,000			(20,462)	(20,462)	32,382,000	327,000		32,709,000	630,000	33,339,000
Other comprehensive income (loss):
Net earnings (loss) on risk management derivatives							12,063,000								11,941,000		122,000	12,063,000
Reclassification of derivatives to earnings							(11,231,000)								(11,118,000)		(113,000)	(11,231,000)
Foreign currency translation adjustment							2,000								2,000		0	2,000
Pension liability adjustment							(46,000)								(46,000)		0	(46,000)
Other comprehensive income (loss)								788,000								779,000		788,000
Comprehensive income (loss)								63,149,000								33,488,000	639,000	34,127,000
Value at Jul. 31, 2010	1,000	6,131	(6,162)	969					1,000	27,219	(27,119)	1,100
Value at Jul. 31, 2010					359,782,000	3,671,000	(406,000)	363,047,000					141,281,000	(58,644,000)	(415,000)	82,222,000	3,680,000	85,902,000
Shares at Jul. 31, 2010													69,521,800	702,200
Shares at Jul. 31, 2010	1,000								1,000
Comprehensive income (loss):
Net earnings (loss)								(28,802,000)										(32,895,000)
Value at Oct. 31, 2010
Value at Jul. 31, 2010	1,000	6,131	(6,162)	969					1,000	27,219	(27,119)	1,100
Value at Jul. 31, 2010					359,782,000	3,671,000	(406,000)	363,047,000					141,281,000	(58,644,000)		82,222,000	3,680,000	85,902,000
Shares at Jul. 31, 2010													69,521,800	702,200
Shares at Jul. 31, 2010	1,000								1,000
Capital contribution		2,789		2,789						8,163		8,163
Contributions in connection with non-cash ESOP and stock and unit-based compensation charges					23,406,000	239,000		23,645,000					23,171,000	235,000		23,406,000	239,000	23,645,000
Distributions					(272,777,000)	(2,783,000)		(275,560,000)					(143,552,000)	(1,450,000)		(145,002,000)	(2,783,000)	(147,785,000)
Common units issued in connection with acquisitions - value					2,940,000	30,000		2,970,000
Common units issued in offering, net of issuance costs - shares																		5,100,000
Cash contributed by Ferrellgas Partners and general partner					157,680,000	1,611,000		159,291,000
Comprehensive income (loss):
Net earnings (loss)			(2,789)	(2,789)	(10,950,000)	(112,000)		(11,062,000)			(8,163)	(8,163)						(43,760,000)
Cumulative effect of change in accounting principle					1,242,000	13,000		1,255,000
Other comprehensive income (loss):
Net earnings (loss) on risk management derivatives							22,676,000											22,676,000
Reclassification of derivatives to earnings							(17,358,000)											(17,358,000)
Foreign currency translation adjustment							2,000											2,000
Pension liability adjustment							(220,000)											(220,000)
Other comprehensive income (loss)								5,100,000
Comprehensive income (loss)								(4,707,000)
Value at Jul. 31, 2011	1,000	8,920	(8,951)	969					1,000	35,382	(35,282)	1,100
Value at Jul. 31, 2011					261,323,000	2,669,000	4,694,000	268,686,000										88,317,000
Shares at Jul. 31, 2011	1,000								1,000
Value at Apr. 30, 2011
Comprehensive income (loss):
Net earnings (loss)								(31,746,000)										(35,850,000)
Value at Jul. 31, 2011	1,000								1,000
Value at Jul. 31, 2011								268,686,000										88,317,000
Shares at Jul. 31, 2011	1,000								1,000
Comprehensive income (loss):
Net earnings (loss)								(28,802,000)										(32,895,000)
Value at Oct. 31, 2011
Value at Jul. 31, 2011	1,000	8,920	(8,951)	969					1,000	35,382	(35,282)	1,100
Value at Jul. 31, 2011								268,686,000										88,317,000
Shares at Jul. 31, 2011	1,000								1,000
Capital contribution		1,999		1,999						3,489		3,489
Comprehensive income (loss):
Net earnings (loss)			(1,999)	(1,999)				5,589,000			(3,489)	(3,489)						(10,896,000)
Other comprehensive income (loss):
Net earnings (loss) on risk management derivatives																		(25,068,000)
Reclassification of derivatives to earnings																		7,108,000
Foreign currency translation adjustment																		(52,000)
Pension liability adjustment																		38,000
Value at Jul. 31, 2012	1,000	10,919	(10,950)	969					1,000	38,871	(38,771)	1,100
Value at Jul. 31, 2012								153,140,000										(27,526,000)
Shares at Jul. 31, 2012	1,000								1,000
Value at Apr. 30, 2012
Comprehensive income (loss):
Net earnings (loss)								(31,746,000)										(35,850,000)
Value at Jul. 31, 2012	1,000								1,000
Value at Jul. 31, 2012								$ 153,140,000										$ (27,526,000)
Shares at Jul. 31, 2012	1,000								1,000