CONDENSED CONSOLIDATED STATEMENT OF EQUITY (DEFICIT) - USD ($)	Ferrellgas, L.P. [Member] Limited Partner Unitholders	Ferrellgas, L.P. [Member] General Partner [Member]	Ferrellgas, L.P. [Member] Accumulated Other Comprehensive Income (Loss)	Ferrellgas, L.P. [Member]	Limited Partner Unitholders Class A Limited Partner Units	Limited Partner Unitholders Class B Limited Partner Units	General Partner [Member]	Accumulated Other Comprehensive Income (Loss)	Parent [Member]	Non-Controlling Interest [Member]	Total
Partners' capital balance (in shares) at Jul. 31, 2020					4,857,600		49,500
Partners' capital balance, beginning at Jul. 31, 2020	$ (821,462,000)	$ (8,216,000)	$ (2,313,000)	$ (831,991,000)	$ (1,126,452,000)		$ (71,287,000)	$ (2,303,000)	$ (1,200,042,000)	$ (8,226,000)	$ (1,208,268,000)
Increase (Decrease) in Partners' Capital [Roll Forward]
Contributions in connection with non-cash ESOP compensation charges	701,000	7,000		708,000	694,000		7,000		701,000	7,000	708,000
Net income (loss)	(38,360,000)	(391,000)		(38,751,000)	(45,601,000)		(461,000)		(46,062,000)	(391,000)	(46,453,000)
Other comprehensive income (loss)			7,917,000	7,917,000				7,837,000	7,837,000	80,000	7,917,000
Partners' capital balance, ending at Oct. 31, 2020	(859,121,000)	(8,600,000)	5,604,000	(862,117,000)	$ (1,171,359,000)		$ (71,741,000)	5,534,000	(1,237,566,000)	(8,530,000)	(1,246,096,000)
Partners' capital balance (in shares) at Oct. 31, 2020					4,857,600		49,500
Partners' capital balance (in shares) at Jul. 31, 2020					4,857,600		49,500
Partners' capital balance, beginning at Jul. 31, 2020	(821,462,000)	(8,216,000)	(2,313,000)	(831,991,000)	$ (1,126,452,000)		$ (71,287,000)	(2,303,000)	(1,200,042,000)	(8,226,000)	(1,208,268,000)
Increase (Decrease) in Partners' Capital [Roll Forward]
Contributions in connection with non-cash ESOP compensation charges		23,000.0
Contributions from partners							46,000.0
Net income (loss)				(22,474,000)							(49,897,000)
Other comprehensive income (loss)				34,496,000							34,496,000
Partners' capital balance, ending at Apr. 30, 2021	(849,381,000)	(8,501,000)	32,183,000	(825,699,000)	$ (1,181,241,000)	$ 388,147,000	$ (71,840,000)	31,845,000	(833,089,000)	(8,163,000)	(841,252,000)
Partners' capital balance (in shares) at Apr. 30, 2021					4,857,600	1,300,000.0	49,500
Partners' capital balance (in shares) at Oct. 31, 2020					4,857,600		49,500
Partners' capital balance, beginning at Oct. 31, 2020	(859,121,000)	(8,600,000)	5,604,000	(862,117,000)	$ (1,171,359,000)		$ (71,741,000)	5,534,000	(1,237,566,000)	(8,530,000)	(1,246,096,000)
Increase (Decrease) in Partners' Capital [Roll Forward]
Contributions in connection with non-cash ESOP compensation charges	754,000	8,000		762,000	746,000		8,000		754,000	8,000	762,000
Net income (loss)	71,026,000	724,000		71,750,000	62,634,000		633,000		63,267,000	724,000	63,991,000
Other comprehensive income (loss)			28,516,000	28,516,000				28,228,000	28,228,000	288,000	28,516,000
Partners' capital balance, ending at Jan. 31, 2021	(787,341,000)	(7,868,000)	34,120,000	(761,089,000)	$ (1,107,979,000)		$ (71,100,000)	33,762,000	(1,145,317,000)	(7,510,000)	(1,152,827,000)
Partners' capital balance (in shares) at Jan. 31, 2021					4,857,600		49,500
Increase (Decrease) in Partners' Capital [Roll Forward]
Contributions in connection with non-cash ESOP compensation charges	803,000	8,000		811,000	$ 795,000		$ 8,000		803,000	8,000	811,000
Issuance of Class B Units, net of offering costs						$ 388,147,000			388,147,000		388,147,000
Issuance of Class B Units (in shares)						1,300,000.0
Net earnings allocated to preferred units	(8,011,000)			(8,011,000)	(8,011,000)				(8,011,000)		(8,011,000)
Net income (loss)	(54,832,000)	(641,000)		(55,473,000)	(66,046,000)		(748,000)		(66,794,000)	(641,000)	(67,435,000)
Other comprehensive income (loss)			(1,937,000)	(1,937,000)				(1,917,000)	(1,917,000)	(20,000)	(1,937,000)
Partners' capital balance, ending at Apr. 30, 2021	(849,381,000)	(8,501,000)	32,183,000	(825,699,000)	$ (1,181,241,000)	$ 388,147,000	$ (71,840,000)	31,845,000	(833,089,000)	(8,163,000)	(841,252,000)
Partners' capital balance (in shares) at Apr. 30, 2021					4,857,600	1,300,000.0	49,500
Partners' capital balance (in shares) at Jul. 31, 2021					4,857,600	1,300,000.0	49,500
Partners' capital balance, beginning at Jul. 31, 2021	(887,043,000)	(8,886,000)	89,786,000	(806,143,000)	$ (1,214,813,000)	$ 383,012,000	$ (72,178,000)	88,866,000	(815,113,000)	(7,966,000)	(823,079,000)
Increase (Decrease) in Partners' Capital [Roll Forward]
Contributions in connection with non-cash ESOP compensation charges	900,000	9,000		909,000	892,000		8,000		900,000	9,000	909,000
Distributions	(50,000,000)			(50,000,000)		(49,998,000)			(49,998,000)		(49,998,000)
Net earnings allocated to preferred units	(17,005,000)			(17,005,000)	(16,835,000)		(170,000)		(17,005,000)		(17,005,000)
Net income (loss)	(7,913,000)	(254,000)		(8,167,000)	(8,520,000)		(86,000)		(8,606,000)	(254,000)	(8,860,000)
Other comprehensive income (loss)			50,322,000	50,322,000				49,813,000	49,813,000	509,000	50,322,000
Partners' capital balance, ending at Oct. 31, 2021	(961,061,000)	(9,131,000)	140,108,000	(830,084,000)	$ (1,239,276,000)	$ 333,014,000	$ (72,426,000)	138,679,000	(840,009,000)	(7,702,000)	(847,711,000)
Partners' capital balance (in shares) at Oct. 31, 2021					4,857,600	1,300,000.0	49,500
Partners' capital balance (in shares) at Jul. 31, 2021					4,857,600	1,300,000.0	49,500
Partners' capital balance, beginning at Jul. 31, 2021	(887,043,000)	(8,886,000)	89,786,000	(806,143,000)	$ (1,214,813,000)	$ 383,012,000	$ (72,178,000)	88,866,000	(815,113,000)	(7,966,000)	(823,079,000)
Increase (Decrease) in Partners' Capital [Roll Forward]
Contributions in connection with non-cash ESOP compensation charges		25,000.0
Contributions from partners							49,000.0
Net income (loss)				170,790,000							168,615,000
Other comprehensive income (loss)				(12,538,000)							(12,538,000)
Partners' capital balance, ending at Apr. 30, 2022	(814,109,000)	(7,631,000)	77,248,000	(744,492,000)	$ (1,145,259,000)	$ 383,012,000	$ (70,971,000)	76,454,000	(756,764,000)	(6,837,000)	(763,601,000)
Partners' capital balance (in shares) at Apr. 30, 2022					4,857,600	1,300,000.0	49,500
Partners' capital balance (in shares) at Oct. 31, 2021					4,857,600	1,300,000.0	49,500
Partners' capital balance, beginning at Oct. 31, 2021	(961,061,000)	(9,131,000)	140,108,000	(830,084,000)	$ (1,239,276,000)	$ 333,014,000	$ (72,426,000)	138,679,000	(840,009,000)	(7,702,000)	(847,711,000)
Increase (Decrease) in Partners' Capital [Roll Forward]
Contributions in connection with non-cash ESOP compensation charges	743,000	8,000		751,000	736,000		7,000		743,000	8,000	751,000
Net earnings allocated to preferred units	(16,317,000)			(16,317,000)	(16,154,000)		(163,000)		(16,317,000)		(16,317,000)
Net income (loss)	109,138,000	947,000		110,085,000	57,323,000	49,998,000	1,084,000		108,405,000	947,000	109,352,000
Other comprehensive income (loss)			(48,070,000)	(48,070,000)				(47,583,000)	(47,583,000)	(487,000)	(48,070,000)
Partners' capital balance, ending at Jan. 31, 2022	(867,497,000)	(8,176,000)	92,038,000	(783,635,000)	$ (1,197,371,000)	$ 383,012,000	$ (71,498,000)	91,096,000	(794,761,000)	(7,234,000)	(801,995,000)
Partners' capital balance (in shares) at Jan. 31, 2022					4,857,600	1,300,000.0	49,500
Increase (Decrease) in Partners' Capital [Roll Forward]
Contributions in connection with non-cash ESOP compensation charges	768,000	8,000		776,000	$ 759,000		$ 9,000		768,000	8,000	776,000
Net earnings allocated to preferred units	(15,715,000)			(15,715,000)	(15,558,000)		(157,000)		(15,715,000)		(15,715,000)
Net income (loss)	68,335,000	537,000		68,872,000	66,911,000		675,000		67,586,000	537,000	68,123,000
Other comprehensive income (loss)			(14,790,000)	(14,790,000)				(14,642,000)	(14,642,000)	(148,000)	(14,790,000)
Partners' capital balance, ending at Apr. 30, 2022	$ (814,109,000)	$ (7,631,000)	$ 77,248,000	$ (744,492,000)	$ (1,145,259,000)	$ 383,012,000	$ (70,971,000)	$ 76,454,000	$ (756,764,000)	$ (6,837,000)	$ (763,601,000)
Partners' capital balance (in shares) at Apr. 30, 2022					4,857,600	1,300,000.0	49,500