Consolidated Statements Of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Revenues:
Revenues	$ 553,560,000	$ 510,833,000	$ 854,454,000	$ 804,047,000
Costs and expenses:
Operating expense - personnel, vehicle, plant and other	115,247,000	128,233,000	224,274,000	242,776,000
Operating expense - equipment lease expense	6,862,000	8,261,000	13,692,000	16,649,000
Depreciation and amortization expense	21,249,000	19,795,000	42,639,000	39,014,000
General and administrative expense	20,475,000	14,192,000	33,555,000	23,887,000
Non-cash employee stock ownership plan compensation charge	762,000	630,000	1,470,000	1,425,000
Loss on asset sales and disposals	80,000	2,148,000	893,000	4,383,000
Reorganization expense - professional fees	(1,200,000)		(1,200,000)
Operating income	114,604,000	96,378,000	122,356,000	97,008,000
Interest expense	(52,595,000)	(47,548,000)	(106,821,000)	(93,245,000)
Other income (expense), net	3,508,000	76,000	3,616,000	(56,000)
Earnings (loss) before income taxes	64,317,000	48,906,000	17,951,000	3,707,000
Income tax expense (benefit)	326,000	115,000	413,000	633,000
Net earnings (loss)	63,991,000	48,791,000	17,538,000	3,074,000
Net earnings (loss) attributable to noncontrolling interest	724,000	584,000	333,000	211,000
Net earnings (loss)	63,267,000	48,207,000	17,205,000	2,863,000
Less: General partner's interest in net earnings (loss)	633,000	482,000	172,000	29,000
Common unitholders' interest in net earnings (loss)	$ 62,634,000	$ 47,725,000	$ 17,033,000	$ 2,834,000
Basic and diluted net earnings (loss) per common unit	$ 0.64	$ 0.49	$ 0.18	$ 0.03
Propane [Member]
Revenues:
Revenues	$ 528,434,000	$ 485,247,000	$ 809,483,000	$ 758,632,000
Costs and expenses:
Cost of sales	270,777,000	237,843,000	408,404,000	371,871,000
Other Revenues
Revenues:
Revenues	25,126,000	25,586,000	44,971,000	45,415,000
Costs and expenses:
Cost of sales	3,504,000	3,353,000	7,171,000	7,034,000
Ferrellgas Partners Finance Corp. [Member]
Costs and expenses:
General and administrative expense	225		2,149	891
Net earnings (loss)	(225)		(2,149)	(891)
Ferrellgas, L.P. [Member]
Revenues:
Revenues	553,560,000	510,833,000	854,454,000	804,047,000
Costs and expenses:
Operating expense - personnel, vehicle, plant and other	115,247,000	128,233,000	224,274,000	242,776,000
Operating expense - equipment lease expense	6,862,000	8,261,000	13,692,000	16,649,000
Depreciation and amortization expense	21,249,000	19,795,000	42,639,000	39,014,000
General and administrative expense	20,254,000	14,085,000	33,330,000	23,781,000
Non-cash employee stock ownership plan compensation charge	762,000	630,000	1,470,000	1,425,000
Loss on asset sales and disposals	80,000	2,148,000	893,000	4,383,000
Operating income	114,825,000	96,485,000	122,581,000	97,114,000
Interest expense	(46,522,000)	(38,690,000)	(93,050,000)	(75,567,000)
Other income (expense), net	3,759,000	76,000	3,867,000	(56,000)
Earnings (loss) before income taxes	72,062,000	57,871,000	33,398,000	21,491,000
Income tax expense (benefit)	312,000	115,000	399,000	633,000
Net earnings (loss)	71,750,000	57,756,000	32,999,000	20,858,000
Ferrellgas, L.P. [Member] | Propane [Member]
Revenues:
Revenues	528,434,000	485,247,000	809,483,000	758,632,000
Costs and expenses:
Cost of sales	270,777,000	237,843,000	408,404,000	371,871,000
Ferrellgas, L.P. [Member] | Other Revenues
Revenues:
Revenues	25,126,000	25,586,000	44,971,000	45,415,000
Costs and expenses:
Cost of sales	3,504,000	3,353,000	7,171,000	7,034,000
Ferrellgas Finance Corp. [Member]
Costs and expenses:
General and administrative expense	250	2,888	1,803	3,906
Net earnings (loss)	$ (250)	$ (2,888)	$ (1,803)	$ (3,906)