Consolidated Statements Of Earnings - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017
Revenues:
Propane and other gas liquids sales	$ 592,239,000	$ 437,375,000	$ 894,997,000	$ 679,774,000
Midstream operations	117,276,000	96,787,000	238,036,000	204,831,000
Other	45,641,000	45,088,000	76,778,000	74,187,000
Total revenues	755,156,000	579,250,000	1,209,811,000	958,792,000
Costs and expenses:
Cost of sales - propane and other gas liquids sales	362,918,000	235,029,000	542,433,000	354,241,000
Cost of sales - midstream operations	107,067,000	87,024,000	215,192,000	181,666,000
Cost of sales - other	20,787,000	20,657,000	34,489,000	32,403,000
Operating expense	123,716,000	113,076,000	234,178,000	218,162,000
Depreciation and amortization expense	25,485,000	25,607,000	51,217,000	51,809,000
General and administrative expense	14,891,000	12,279,000	28,055,000	26,548,000
Equipment lease expense	6,954,000	7,416,000	13,695,000	14,765,000
Non-cash employee stock ownership plan compensation charge	4,031,000	2,945,000	7,993,000	6,699,000
Asset Impairment Charges	10,005,000	0	10,005,000	0
Loss on asset sales and disposals	39,249,000	45,000	40,144,000	6,468,000
Operating income	40,053,000	75,172,000	32,410,000	66,031,000
Interest expense	(42,673,000)	(36,819,000)	(83,480,000)	(72,247,000)
Other income, net	684,000	763,000	1,195,000	1,271,000
Earnings (loss) before income taxes	(1,936,000)	39,116,000	(49,875,000)	(4,945,000)
Income tax expense (benefit)	(162,000)	588,000	215,000	(2,000)
Net Earnings (Loss)	(1,774,000)	38,528,000	(50,090,000)	(4,943,000)
Net earnings attributable to noncontrolling interest	69,000	430,000	(332,000)	32,000
Net earnings attributable to Ferrellgas Partners, L.P.	(1,843,000)	38,098,000	(49,758,000)	(4,975,000)
Less: General partner's interest in net earnings	(19,000)	381,000	(498,000)	(50,000)
Common unitholders' interest in net earnings (loss)	$ (1,824,000)	$ 37,717,000	$ (49,260,000)	$ (4,925,000)
Basic and diluted net earnings per common unitholders' interest	$ (0.02)	$ 0.39	$ (0.51)	$ (0.05)
Cash distributions declared per common unit	$ 0.10	$ 0.10	$ 0.20	$ 0.20
Ferrellgas Partners Finance Corp. [Member]
Costs and expenses:
General and administrative expense	$ 225	$ 0	$ 275	$ 92
Net Earnings (Loss)	(225)	0	(275)	(92)
Ferrellgas, L.P. [Member]
Revenues:
Propane and other gas liquids sales	592,239,000	437,375,000	894,997,000	679,774,000
Midstream operations	117,276,000	96,787,000	238,036,000	204,831,000
Other	45,641,000	45,088,000	76,778,000	74,187,000
Total revenues	755,156,000	579,250,000	1,209,811,000	958,792,000
Costs and expenses:
Cost of sales - propane and other gas liquids sales	362,918,000	235,029,000	542,433,000	354,241,000
Cost of sales - midstream operations	107,067,000	87,024,000	215,192,000	181,666,000
Cost of sales - other	20,787,000	20,657,000	34,489,000	32,403,000
Operating expense	123,716,000	113,076,000	234,178,000	218,162,000
Depreciation and amortization expense	25,485,000	25,607,000	51,217,000	51,809,000
General and administrative expense	14,890,000	12,278,000	28,054,000	26,547,000
Equipment lease expense	6,954,000	7,416,000	13,695,000	14,765,000
Non-cash employee stock ownership plan compensation charge	4,031,000	2,945,000	7,993,000	6,699,000
Asset Impairment Charges	10,005,000	0	10,005,000	0
Loss on asset sales and disposals	39,249,000	45,000	40,144,000	6,468,000
Operating income	40,054,000	75,173,000	32,411,000	66,032,000
Interest expense	(34,058,000)	(32,748,000)	(66,254,000)	(64,146,000)
Other income, net	684,000	763,000	1,195,000	1,271,000
Earnings (loss) before income taxes	6,680,000	43,188,000	(32,648,000)	3,157,000
Income tax expense (benefit)	(167,000)	588,000	204,000	(3,000)
Net Earnings (Loss)	6,847,000	42,600,000	(32,852,000)	3,160,000
Net earnings attributable to Ferrellgas Partners, L.P.	6,847,000	42,600,000	(32,852,000)	3,160,000
Ferrellgas Finance Corp. [Member]
Costs and expenses:
General and administrative expense	3,666	3,400	5,216	4,950
Net Earnings (Loss)	$ (3,666)	$ (3,400)	$ (5,216)	$ (4,950)