Consolidated Statements Of Partners' Capital (Deficit) (USD $)	Total	Accumulated Other Comprehensive Income (Loss)	Total Ferrellgas Partners, L.P. Partners' Capital (Deficit) [Member]	Noncontrolling Interest [Member]	Common Unitholders [Member]	General Partner Unitholder [Member]	Ferrellgas, L.P. [Member]	Ferrellgas, L.P. [Member] Accumulated Other Comprehensive Income (Loss)	Ferrellgas, L.P. [Member] Common Unitholders [Member]	Ferrellgas, L.P. [Member] General Partner Unitholder [Member]
Partners' capital balance at Jul. 31, 2014	$ (111,646,000)	$ 6,181,000	$ (112,366,000)	$ 720,000	$ (57,893,000)	$ (60,654,000)	$ 69,925,000	$ 6,258,000	$ 63,024,000	$ 643,000
Partners' capital balance (in units) at Jul. 31, 2014					81,228,200	820,500
Increase (Decrease) in Partners' Capital [Roll Forward]
Contributions in connection with non-cash ESOP and stock and unit-based compensation charges	36,429,000		36,061,000	368,000	35,700,000	361,000	36,429,000		36,061,000	368,000
Distributions	(126,686,000)		(125,328,000)	(1,358,000)	(124,074,000)	(1,254,000)	(134,535,000)		(133,177,000)	(1,358,000)
Issuance of common units in connection with acquisitions - units					1,489,400	15,100
Issuance of common units in connection with acquisitions - value	42,895,000		42,464,000	431,000	42,039,000	425,000
Contributions from partners							42,655,000		42,224,000	431,000
Net earnings	89,422,000		88,395,000	1,027,000	87,511,000	884,000	101,676,000		100,649,000	1,027,000
Other comprehensive income (loss)	(33,769,000)	(33,428,000)	(33,428,000)	(341,000)			(33,769,000)	(33,769,000)
Partners' capital balance at Apr. 30, 2015	(103,355,000)	(27,247,000)	(104,202,000)	847,000	(16,717,000)	(60,238,000)	82,381,000	(27,511,000)	108,781,000	1,111,000
Partners' capital balance (in units) at Apr. 30, 2015					82,717,600	835,600
Partners' capital balance at Jan. 31, 2015
Increase (Decrease) in Partners' Capital [Roll Forward]
Net earnings	36,220,000						40,404,000
Other comprehensive income (loss)	18,826,000						18,826,000
Partners' capital balance at Apr. 30, 2015	$ (103,355,000)						$ 82,381,000