Consolidated Statements Of Partners' Capital (Deficit) - 3 months ended Oct. 31, 2016 - USD ($) $ in Thousands	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 (in units) at Jul. 31, 2016					98,002,700	989,900
Partners' capital balance at Jul. 31, 2016	$ (651,780)	$ (10,468)	$ (647,057)	$ (4,723)	$ (570,754)	$ (65,835)	$ (469,413)	$ (10,560)	$ (454,222)	$ (4,631)
Increase (Decrease) in Partners' Capital [Roll Forward]
Contributions in connection with non-cash ESOP and stock and unit-based compensation charges	5,635		5,578	57	5,522	56	5,635	0	5,578	57
Distributions	(50,807)		(50,294)	(513)	(49,791)	(503)	(66,658)	0	(66,145)	(513)
Partners' Capital Account, Treasury Units, Purchased	(15,851)		(15,851)	0	$ (15,851)	$ 0
Partners' Capital Account, Units, Treasury Units Purchased					(850,000)	0
Net loss	(43,471)		(43,073)	(398)	$ (42,642)	$ (431)	(39,440)	0	(39,042)	(398)
Other comprehensive income (loss)	9,376	9,282	9,282	94			9,376	9,376	0	0
Partners' capital balance (in units) at Oct. 31, 2016					97,152,700	989,900
Partners' capital balance at Oct. 31, 2016	$ (746,898)	$ (1,186)	$ (741,415)	$ (5,483)	$ (673,516)	$ (66,713)	$ (560,500)	$ (1,184)	$ (553,831)	$ (5,485)