Condensed Consolidated Statements Of Partners' Capital (USD $)	Ferrellgas, L.P. And Subsidiaries [Member] Common Unitholders [Member]	Ferrellgas, L.P. And Subsidiaries [Member] General Partner Unitholder [Member]	Ferrellgas, L.P. And Subsidiaries [Member] Risk Management [Member]	Ferrellgas, L.P. And Subsidiaries [Member] Currency Translation Adjustments [Member]	Ferrellgas, L.P. And Subsidiaries [Member] Pension Liability [Member]	Ferrellgas, L.P. And Subsidiaries [Member]	Common Unitholders [Member]	General Partner Unitholder [Member]	Risk Management [Member]	Currency Translation Adjustments [Member]	Pension Liability [Member]	Total Ferrellgas Partners, L.P. Partners' Capital [Member]	Non-controlling Interest [Member]	Total
Value at Jul. 31, 2010							$ 141,281,000	$ (58,644,000)	$ (166,000)	$ 24,000	$ (273,000)	$ 82,222,000	$ 3,680,000	$ 85,902,000
Shares at Jul. 31, 2010							69,521,800	702,200
Contributions in connection with non-cash ESOP and stock and unit-based compensation charges							3,388,000	34,000	0	0	0	3,422,000	35,000	3,457,000
Distributions						(35,484,000)	(34,774,000)	(351,000)	0	0	0	(35,125,000)	(359,000)	(35,484,000)
Common units issued in connection with acquisitions - shares							63,500	600
Common units issued in connection with acquisitions - value							1,625,000	16,000	0	0	0	1,641,000	17,000	1,658,000
Common unit options issued - shares							26,500	300
Common unit options issued - value							308,000	3,000	0	0	0	311,000	3,000	314,000
Comprehensive income (loss):
Net loss						(21,999,000)	(27,763,000)	(280,000)	0	0	0	(28,043,000)	(222,000)	(28,265,000)
Cumulative effect of change in accounting principle							1,230,000	12,000	0	0	0	1,242,000	13,000	1,255,000
Other comprehensive income (loss):
Net earnings on risk management derivatives							0	0	4,951,000	0	0		51,000
Reclassification of derivatives to earnings							0	0	(577,000)	0	0		(6,000)
Foreign currency translation adjustment							0	0	0	2,000	0
Other comprehensive income (loss)												4,376,000		4,421,000
Comprehensive loss												(22,425,000)	(164,000)	(22,589,000)
Value at Oct. 31, 2010							85,295,000	(59,210,000)	4,208,000	26,000	(273,000)	30,046,000	3,212,000	33,258,000
Shares at Oct. 31, 2010							69,611,800	703,100
Value at Jul. 31, 2011	261,323,000	2,669,000	5,161,000	26,000	(493,000)	268,686,000	139,614,000	(58,660,000)	5,098,000	26,000	(491,000)	85,587,000	2,730,000	88,317,000
Shares at Jul. 31, 2011							75,966,400	767,300
Contributions in connection with non-cash ESOP and stock and unit-based compensation charges	5,441,000	55,000	0	0	0	5,496,000	5,386,000	55,000	0	0	0	5,441,000	55,000	5,496,000
Distributions	(38,367,000)	(391,000)	0	0	0	(38,758,000)	(37,983,000)	(384,000)	0	0	0	(38,367,000)	(391,000)	(38,758,000)
Comprehensive income (loss):
Net loss	(28,511,000)	(291,000)	0	0	0	(28,802,000)	(32,278,000)	(326,000)	0	0	0	(32,604,000)	(291,000)	(32,895,000)
Other comprehensive income (loss):
Net earnings on risk management derivatives	0	0	(2,528,000)	0	0		0	0	(2,502,000)	0	0		(26,000)
Reclassification of derivatives to earnings	0	0	(1,879,000)	0	0		0	0	(1,860,000)	0	0		(19,000)
Foreign currency translation adjustment	0	0	0	2,000	0		0	0	0	2,000	0
Pension liability adjustment	0	0	0	0	0
Other comprehensive income (loss)						(4,405,000)						(4,360,000)		(4,405,000)
Comprehensive loss						(33,207,000)						(36,964,000)	(336,000)	(37,300,000)
Value at Oct. 31, 2011	$ 199,886,000	$ 2,042,000	$ 754,000	$ 28,000	$ (493,000)	$ 202,217,000	$ 74,739,000	$ (59,315,000)	$ 736,000	$ 28,000	$ (491,000)	$ 15,697,000	$ 2,058,000	$ 17,755,000
Shares at Oct. 31, 2011							75,966,400	767,300