Consolidated Statements Of Operations - USD ($)	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Revenues:
Revenues	$ 412,130,000	$ 479,625,000	$ 1,216,177,000	$ 1,405,311,000
Costs and expenses:
Operating expense - personnel, vehicle, plant and other	121,558,000	119,991,000	364,334,000	351,541,000
Operating expense - equipment lease expense	8,075,000		24,724,000
Equipment lease expense, preadoption		8,319,000		24,597,000
Depreciation and amortization expense	20,366,000	20,617,000	59,380,000	59,214,000
General and administrative expense	12,560,000	11,516,000	36,447,000	42,037,000
Non-cash employee stock ownership plan compensation charge	757,000	(4,000)	2,182,000	4,688,000
Loss on asset sales and disposals	1,859,000	1,683,000	6,242,000	8,403,000
Operating income	67,950,000	64,794,000	164,958,000	139,986,000
Interest expense	(45,703,000)	(44,162,000)	(138,948,000)	(132,931,000)
Loss on extinguishment of debt	(37,399,000)		(37,399,000)
Other income (expense), net	(158,000)	251,000	(214,000)	356,000
Earnings (loss) before income taxes	(15,310,000)	20,883,000	(11,603,000)	7,411,000
Income tax expense	161,000	123,000	794,000	284,000
Net earnings (loss)	(15,471,000)	20,760,000	(12,397,000)	7,127,000
Net earnings (loss) attributable to noncontrolling interest	(78,000)	299,000	133,000	337,000
Net earnings (loss)	(15,393,000)	20,461,000	(12,530,000)	6,790,000
Less: General partner's interest in net earnings (loss)	(154,000)	205,000	(125,000)	68,000
Common unitholders' interest in net earnings ( loss)	$ (15,239,000)	$ 20,256,000	$ (12,405,000)	$ 6,722,000
Basic and diluted net earnings (loss) per common unit	$ (0.16)	$ 0.21	$ (0.13)	$ 0.07
Cash distributions declared or paid per unit	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Propane [Member]
Revenues:
Revenues	$ 391,745,000	$ 459,556,000	$ 1,150,377,000	$ 1,344,634,000
Costs and expenses:
Cost of sales	176,265,000	250,389,000	548,136,000	766,056,000
Other Revenues
Revenues:
Revenues	20,385,000	20,069,000	65,800,000	60,677,000
Costs and expenses:
Cost of sales	2,740,000	2,320,000	9,774,000	8,789,000
Ferrellgas Partners Finance Corp. [Member]
Costs and expenses:
General and administrative expense	3,087	1,725	3,977	3,666
Net earnings (loss)	(3,087)	(1,725)	(3,977)	(3,666)
Ferrellgas, L.P. [Member]
Revenues:
Revenues	412,130,000	479,625,000	1,216,177,000	1,405,311,000
Costs and expenses:
Operating expense - personnel, vehicle, plant and other	121,558,000	119,991,000	364,334,000	351,541,000
Operating expense - equipment lease expense	8,075,000		24,724,000
Equipment lease expense, preadoption		8,319,000		24,597,000
Depreciation and amortization expense	20,366,000	20,617,000	59,380,000	59,214,000
General and administrative expense	12,555,000	11,512,000	36,336,000	42,028,000
Non-cash employee stock ownership plan compensation charge	757,000	(4,000)	2,182,000	4,688,000
Loss on asset sales and disposals	1,859,000	1,683,000	6,242,000	8,403,000
Operating income	67,955,000	64,798,000	165,069,000	139,995,000
Interest expense	(38,006,000)	(35,395,000)	(113,573,000)	(106,740,000)
Loss on extinguishment of debt	(37,399,000)		(37,399,000)
Other income (expense), net	(158,000)	251,000	(214,000)	356,000
Earnings (loss) before income taxes	(7,608,000)	29,654,000	13,883,000	33,611,000
Income tax expense	112,000	100,000	745,000	254,000
Net earnings (loss)	(7,720,000)	29,554,000	13,138,000	33,357,000
Ferrellgas, L.P. [Member] | Propane [Member]
Revenues:
Revenues	391,745,000	459,556,000	1,150,377,000	1,344,634,000
Costs and expenses:
Cost of sales	176,265,000	250,389,000	548,136,000	766,056,000
Ferrellgas, L.P. [Member] | Other Revenues
Revenues:
Revenues	20,385,000	20,069,000	65,800,000	60,677,000
Costs and expenses:
Cost of sales	2,740,000	2,320,000	9,774,000	8,789,000
Ferrellgas Finance Corp. [Member]
Costs and expenses:
General and administrative expense	2,104,000	225,000	6,010	5,625
Net earnings (loss)	$ (2,104,000)	$ (225,000)	$ (6,010)	$ (5,625)