Partners' Capital (Distributions Paid) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Limited Partners' Capital Account [Line Items]
Distributions	$ 41,774	$ 39,935
Ferrellgas, L.P. [Member]
Limited Partners' Capital Account [Line Items]
Distributions	42,200	40,343
Public Common Unitholders [Member]
Limited Partners' Capital Account [Line Items]
Distributions	27,788	26,498
Ferrell Companies [Member]
Limited Partners' Capital Account [Line Items]
Distributions	11,265	10,735
FCI Trading Corp. [Member]
Limited Partners' Capital Account [Line Items]
Distributions	98	98
Ferrell Propane, Inc. [Member]
Limited Partners' Capital Account [Line Items]
Distributions	26	26
James E. Ferrell [Member]
Limited Partners' Capital Account [Line Items]
Distributions	2,179	2,179
General Partner [Member]
Limited Partners' Capital Account [Line Items]
Distributions	418	399
General Partner [Member] | Ferrellgas, L.P. [Member]
Limited Partners' Capital Account [Line Items]
Distributions	426	408
Ferrellgas Partners [Member] | Ferrellgas, L.P. [Member]
Limited Partners' Capital Account [Line Items]
Distributions	$ 41,774	$ 39,935