Consolidated Statements Of Operations - USD ($)	12 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Revenues:
Revenues	$ 1,684,392,000	$ 2,073,142,000	$ 1,930,277,000
Costs and expenses:
Operating expense	468,868,000	471,748,000	432,412,000
Depreciation and amortization expense	78,846,000	101,795,000	103,351,000
General and administrative expense	59,994,000	54,401,000	49,617,000
Equipment lease expense	33,073,000	28,272,000	29,124,000
Non-cash employee stock ownership plan compensation charge	5,693,000	13,859,000	15,088,000
Asset impairments	0	10,005,000	0
Loss on asset sales and disposals	10,968,000	187,399,000	14,457,000
Operating income (loss)	113,028,000	(91,964,000)	95,367,000
Interest expense	(177,619,000)	(168,467,000)	(152,485,000)
Other income, net	369,000	928,000	1,474,000
Loss before income taxes	(64,222,000)	(259,503,000)	(55,644,000)
Income tax expense	323,000	(2,678,000)	(1,143,000)
Net loss	(64,545,000)	(256,825,000)	(54,501,000)
Net loss attributable to noncontrolling interest	(298,000)	(2,244,000)	(294,000)
Net loss	(64,247,000)	(254,581,000)	(54,207,000)
Less: General partner's interest in net loss	(642,000)	(2,546,000)	(542,000)
Common unitholders' interest in net loss	$ (63,605,000)	$ (252,035,000)	$ (53,665,000)
Basic and diluted net loss per common unit	$ (0.65)	$ (2.59)	$ (0.55)
Common Stock, Dividends, Per Share, Declared		$ 0.40	$ 0.40
Propane [Member]
Revenues:
Revenues	$ 1,608,858,000	$ 1,642,976,000	$ 1,318,412,000
Costs and expenses:
Cost of sales	902,516,000	973,414,000	694,155,000
Midstream Operations [Member]
Revenues:
Revenues		282,319,000	466,703,000
Costs and expenses:
Cost of sales		255,559,000	429,439,000
Other Revenues
Revenues:
Revenues	75,534,000	147,847,000	145,162,000
Costs and expenses:
Cost of sales	11,406,000	68,654,000	67,267,000
Ferrellgas Partners Finance Corp. [Member]
Costs and expenses:
General and administrative expense	3,999	2,115	5,308
Net loss	(3,999)	(2,115)	(5,308)
Ferrellgas, L.P. [Member]
Revenues:
Revenues	1,684,392,000	2,073,142,000	1,930,277,000
Costs and expenses:
Operating expense	468,868,000	471,748,000	432,412,000
Depreciation and amortization expense	78,846,000	101,795,000	103,351,000
General and administrative expense	59,980,000	54,264,000	49,478,000
Equipment lease expense	33,073,000	28,272,000	29,124,000
Non-cash employee stock ownership plan compensation charge	5,693,000	13,859,000	15,088,000
Asset impairments	0	10,005,000	0
Loss on asset sales and disposals	10,968,000	187,399,000	14,457,000
Operating income (loss)	113,042,000	(91,827,000)	95,506,000
Interest expense	(142,635,000)	(133,946,000)	(127,188,000)
Other income, net	369,000	928,000	1,474,000
Loss before income taxes	(29,224,000)	(224,845,000)	(30,208,000)
Income tax expense	293,000	(2,699,000)	(1,149,000)
Equity in earnings (loss) of Ferrellgas, L.P.	0	0	0
Net loss	(29,517,000)	(222,146,000)	(29,059,000)
Net loss	(29,517,000)	(222,146,000)	(29,059,000)
Ferrellgas, L.P. [Member] | Propane [Member]
Revenues:
Revenues	1,608,858,000	1,642,976,000	1,318,412,000
Costs and expenses:
Cost of sales	902,516,000	973,414,000	694,155,000
Ferrellgas, L.P. [Member] | Midstream Operations [Member]
Revenues:
Revenues		282,319,000	466,703,000
Costs and expenses:
Cost of sales		255,559,000	429,439,000
Ferrellgas, L.P. [Member] | Other Revenues
Revenues:
Revenues	75,534,000	147,847,000	145,162,000
Costs and expenses:
Cost of sales	11,406,000	68,654,000	67,267,000
Ferrellgas Finance Corp. [Member]
Costs and expenses:
General and administrative expense	5,625	5,216	5,516
Net loss	$ (5,625)	$ (5,216)	$ (5,516)