Partners' Capital (Distributions Paid) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Limited Partners' Capital Account [Line Items]
Distributions	$ 41,777	$ 39,994	$ 125,328	$ 119,901
Ferrellgas, L.P. [Member]
Limited Partners' Capital Account [Line Items]
Distributions	42,203	40,402	134,535	129,054
Public Common Unitholders [Member]
Limited Partners' Capital Account [Line Items]
Distributions	27,791	26,556	83,370	79,588
Ferrell Companies [Member]
Limited Partners' Capital Account [Line Items]
Distributions	11,265	10,735	33,795	32,205
FCI Trading Corp. [Member]
Limited Partners' Capital Account [Line Items]
Distributions	98	98	294	294
Ferrell Propane, Inc. [Member]
Limited Partners' Capital Account [Line Items]
Distributions	26	26	78	78
James E. Ferrell [Member]
Limited Partners' Capital Account [Line Items]
Distributions	2,179	2,179	6,537	6,537
General Partner [Member]
Limited Partners' Capital Account [Line Items]
Distributions	418	400	1,254	1,199
General Partner [Member] | Ferrellgas, L.P. [Member]
Limited Partners' Capital Account [Line Items]
Distributions	426	408	1,358	1,304
Ferrellgas Partners [Member] | Ferrellgas, L.P. [Member]
Limited Partners' Capital Account [Line Items]
Distributions	$ 41,777	$ 39,994	$ 133,177	$ 127,750