Consolidated Statements Of Earnings - USD ($)	3 Months Ended		9 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Revenues:
Propane and other gas liquids sales	$ 451,302,000	$ 369,437,000	$ 1,346,299,000	$ 1,049,211,000
Midstream operations	22,595,000	126,676,000	260,631,000	331,507,000
Other	41,913,000	41,996,000	118,691,000	116,183,000
Total revenues	515,810,000	538,109,000	1,725,621,000	1,496,901,000
Costs and expenses:
Cost of sales - propane and other gas liquids sales	260,419,000	197,487,000	802,852,000	551,728,000
Cost of sales - midstream operations	14,518,000	118,767,000	229,710,000	300,433,000
Cost of sales - other	19,850,000	20,810,000	54,339,000	53,213,000
Operating expense	116,579,000	104,773,000	350,757,000	322,935,000
Depreciation and amortization expense	25,348,000	25,737,000	76,565,000	77,546,000
General and administrative expense	11,678,000	9,978,000	39,733,000	36,526,000
Equipment lease expense	7,133,000	7,270,000	20,828,000	22,035,000
Non-cash employee stock ownership plan compensation charge	2,738,000	4,697,000	10,731,000	11,396,000
Asset Impairment Charges	0	0	10,005,000	0
Loss on asset sales and disposals	6,270,000	2,393,000	46,414,000	8,861,000
Operating income (loss)	51,277,000	46,197,000	83,687,000	112,228,000
Interest expense	(40,375,000)	(39,860,000)	(123,855,000)	(112,107,000)
Other income, net	227,000	162,000	1,422,000	1,433,000
Earnings (loss) before income taxes	11,129,000	6,499,000	(38,746,000)	1,554,000
Income tax expense (benefit)	67,000	(192,000)	282,000	(194,000)
Net earnings (loss)	11,062,000	6,691,000	(39,028,000)	1,748,000
Net earnings attributable to noncontrolling interest	201,000	155,000	(131,000)	187,000
Net earnings attributable to Ferrellgas Partners, L.P.	10,861,000	6,536,000	(38,897,000)	1,561,000
Less: General partner's interest in net earnings	109,000	66,000	(389,000)	16,000
Common unitholders' interest in net earnings (loss)	$ 10,752,000	$ 6,470,000	$ (38,508,000)	$ 1,545,000
Basic and diluted net earnings per common unitholders' interest	$ 0.11	$ 0.07	$ (0.40)	$ 0.02
Cash distributions declared per common unit	$ 0.10	$ 0.10	$ 0.30	$ 0.30
Ferrellgas Partners Finance Corp. [Member]
Costs and expenses:
General and administrative expense	$ 1,840	$ 3,225	$ 2,115	$ 3,317
Net earnings (loss)	(1,840)	(3,225)	(2,115)	(3,317)
Ferrellgas, L.P. [Member]
Revenues:
Propane and other gas liquids sales	451,302,000	369,437,000	1,346,299,000	1,049,211,000
Midstream operations	22,595,000	126,676,000	260,631,000	331,507,000
Other	41,913,000	41,996,000	118,691,000	116,183,000
Total revenues	515,810,000	538,109,000	1,725,621,000	1,496,901,000
Costs and expenses:
Cost of sales - propane and other gas liquids sales	260,419,000	197,487,000	802,852,000	551,728,000
Cost of sales - midstream operations	14,518,000	118,767,000	229,710,000	300,433,000
Cost of sales - other	19,850,000	20,810,000	54,339,000	53,213,000
Operating expense	116,579,000	104,773,000	350,757,000	322,935,000
Depreciation and amortization expense	25,348,000	25,737,000	76,565,000	77,546,000
General and administrative expense	11,546,000	9,869,000	39,600,000	36,416,000
Equipment lease expense	7,133,000	7,270,000	20,828,000	22,035,000
Non-cash employee stock ownership plan compensation charge	2,738,000	4,697,000	10,731,000	11,396,000
Asset Impairment Charges	0	0	10,005,000	0
Loss on asset sales and disposals	6,270,000	2,393,000	46,414,000	8,861,000
Operating income (loss)	51,409,000	46,306,000	83,820,000	112,338,000
Interest expense	(31,739,000)	(31,270,000)	(97,993,000)	(95,416,000)
Other income, net	227,000	162,000	1,422,000	1,433,000
Earnings (loss) before income taxes	19,897,000	15,198,000	(12,751,000)	18,355,000
Income tax expense (benefit)	57,000	(197,000)	261,000	(200,000)
Net earnings (loss)	19,840,000	15,395,000	(13,012,000)	18,555,000
Net earnings attributable to Ferrellgas Partners, L.P.	19,840,000	15,395,000	(13,012,000)	18,555,000
Ferrellgas Finance Corp. [Member]
Costs and expenses:
General and administrative expense	0	225	5,216	5,175
Net earnings (loss)	$ 0	$ (225)	$ (5,216)	$ (5,175)