Consolidated Statements Of Operations - USD ($)	3 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Revenues:
Revenues	$ 293,214,000	$ 352,309,000
Costs and expenses:
Operating expense - personnel, vehicle, plant and other	114,543,000	110,331,000
Operating expense - equipment lease expense	8,388,000
Equipment lease expense, Topic 840		7,863,000
Depreciation and amortization expense	19,219,000	18,992,000
General and administrative expense	9,695,000	14,179,000
Non-cash employee stock ownership plan compensation charge	795,000	2,748,000
Loss on asset sales and disposals	2,235,000	4,504,000
Operating income (loss)	630,000	(13,491,000)
Interest expense	(45,697,000)	(43,878,000)
Other income (expense), net	(132,000)	19,000
Loss before income taxes	(45,199,000)	(57,350,000)
Income tax expense	518,000	158,000
Net loss	(45,717,000)	(57,508,000)
Net loss attributable to noncontrolling interest	(373,000)	(493,000)
Net loss	(45,344,000)	(57,015,000)
Less: General partner's interest in net loss	(453,000)	(570,000)
Common unitholders' interest in net loss	$ (44,891,000)	$ (56,445,000)
Basic and diluted loss per common unit	$ (0.46)	$ (0.58)
Cash distributions declared or paid per unit	$ 0.00	$ 0.00
Propane [Member]
Revenues:
Revenues	$ 273,385,000	$ 334,966,000
Costs and expenses:
Cost of sales	134,028,000	204,136,000
Other Revenues
Revenues:
Revenues	19,829,000	17,343,000
Costs and expenses:
Cost of sales	3,681,000	3,047,000
Ferrellgas Partners Finance Corp. [Member]
Costs and expenses:
General and administrative expense	891	1,941
Net loss	(891)	(1,941)
Ferrellgas, L.P. [Member]
Revenues:
Revenues	293,214,000	352,309,000
Costs and expenses:
Operating expense - personnel, vehicle, plant and other	114,543,000	110,331,000
Operating expense - equipment lease expense	8,388,000
Equipment lease expense, Topic 840		7,863,000
Depreciation and amortization expense	19,219,000	18,992,000
General and administrative expense	9,696,000	14,175,000
Non-cash employee stock ownership plan compensation charge	795,000	2,748,000
Loss on asset sales and disposals	2,235,000	4,504,000
Operating income (loss)	629,000	(13,487,000)
Interest expense	(36,877,000)	(35,195,000)
Other income (expense), net	(132,000)	19,000
Loss before income taxes	(36,380,000)	(48,663,000)
Income tax expense	518,000	151,000
Net loss	(36,898,000)	(48,814,000)
Ferrellgas, L.P. [Member] | Propane [Member]
Revenues:
Revenues	273,385,000	334,966,000
Costs and expenses:
Cost of sales	134,028,000	204,136,000
Ferrellgas, L.P. [Member] | Other Revenues
Revenues:
Revenues	19,829,000	17,343,000
Costs and expenses:
Cost of sales	3,681,000	3,047,000
Ferrellgas Finance Corp. [Member]
Costs and expenses:
General and administrative expense	1,019	1,550
Net loss	$ (1,019)	$ (1,550)