Consolidated Statements Of Operations - USD ($)	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Revenues:
Revenues	$ 300,894,000	$ 293,214,000
Costs and expenses:
Operating expense - personnel, vehicle, plant and other	109,027,000	114,543,000
Operating expense - equipment lease expense	6,830,000	8,388,000
Depreciation and amortization expense	21,390,000	19,219,000
General and administrative expense	13,080,000	9,695,000
Non-cash employee stock ownership plan compensation charge	708,000	795,000
Loss on asset sales and disposals	813,000	2,235,000
Operating income	7,752,000	630,000
Interest expense	(54,226,000)	(45,697,000)
Other income (expense), net	108,000	(132,000)
Loss before income taxes	(46,366,000)	(45,199,000)
Income tax expense (benefit)	87,000	518,000
Net loss	(46,453,000)	(45,717,000)
Net loss attributable to noncontrolling interest	(391,000)	(373,000)
Net loss	(46,062,000)	(45,344,000)
Less: General partner's interest in net loss	(461,000)	(453,000)
Common unitholders' interest in net loss	$ (45,601,000)	$ (44,891,000)
Basic and diluted net loss per common unit	$ (0.47)	$ (0.46)
Propane [Member]
Revenues:
Revenues	$ 281,049,000	$ 273,385,000
Costs and expenses:
Cost of sales	137,627,000	134,028,000
Other Revenues
Revenues:
Revenues	19,845,000	19,829,000
Costs and expenses:
Cost of sales	3,667,000	3,681,000
Ferrellgas Partners Finance Corp. [Member]
Costs and expenses:
General and administrative expense	1,924	891
Net loss	(1,924)	(891)
Ferrellgas, L.P. [Member]
Revenues:
Revenues	300,894,000	293,214,000
Costs and expenses:
Operating expense - personnel, vehicle, plant and other	109,027,000	114,543,000
Operating expense - equipment lease expense	6,830,000	8,388,000
Depreciation and amortization expense	21,390,000	19,219,000
General and administrative expense	13,076,000	9,696,000
Non-cash employee stock ownership plan compensation charge	708,000	795,000
Loss on asset sales and disposals	813,000	2,235,000
Operating income	7,756,000	629,000
Interest expense	(46,528,000)	(36,877,000)
Other income (expense), net	108,000	(132,000)
Loss before income taxes	(38,664,000)	(36,380,000)
Income tax expense (benefit)	87,000	518,000
Net loss	(38,751,000)	(36,898,000)
Ferrellgas, L.P. [Member] | Propane [Member]
Revenues:
Revenues	281,049,000	273,385,000
Costs and expenses:
Cost of sales	137,627,000	134,028,000
Ferrellgas, L.P. [Member] | Other Revenues
Revenues:
Revenues	19,845,000	19,829,000
Costs and expenses:
Cost of sales	3,667,000	3,681,000
Ferrellgas Finance Corp. [Member]
Costs and expenses:
General and administrative expense	1,553	1,019
Net loss	$ (1,553)	$ (1,019)