Consolidated Statements Of Cash Flows - USD ($)	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Cash flows from operating activities:
Net loss	$ (83,002,000)	$ (64,545,000)	$ (256,825,000)
Reconciliation of net loss to net cash provided by operating activities:
Depreciation and amortization expense	80,481,000	78,846,000	101,795,000
Non-cash employee stock ownership plan compensation charge	2,871,000	5,693,000	13,859,000
Asset impairments	0	0	10,005,000
Loss on asset sales and disposals	7,924,000	10,968,000	187,399,000
Loss on extinguishment of debt, noncash	19,883,000	0	0
Unrealized gain on derivative instruments	0	0	(91,000)
Provision for doubtful accounts	18,604,000	1,525,000	1,778,000
Deferred income tax expense (benefit)	554,000	143,000	(3,818,000)
Exit costs associated with contracts	0	0	11,804,000
Other	12,583,000	12,696,000	9,997,000
Changes in operating assets and liabilities, net of effects from business acquisitions:
Accounts and notes receivable, net of securitization	(121,000)	19,433,000	18,629,000
Inventories	7,790,000	3,211,000	(1,231,000)
Prepaid expenses and other current assets	7,446,000	(26,508,000)	(3,013,000)
Accounts payable	1,223,000	(13,338,000)	(24,189,000)
Accrued interest expense	33,357,000	(1,738,000)	3,551,000
Other current liabilities	(3,430,000)	(12,076,000)	7,248,000
Other assets and liabilities	6,679,000	765,000	(2,750,000)
Net cash provided by operating activities	112,842,000	15,075,000	74,148,000
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(10,195,000)	(13,551,000)	(18,141,000)
Capital expenditures	(70,455,000)	(108,822,000)	(84,919,000)
Proceeds from sale of assets	4,472,000	5,699,000	152,587,000
Cash payments to construct assets in connection with future lease transactions	(37,042,000)	(9,934,000)	0
Cash receipts in connection with leased vehicles	41,924,000	862,000	0
Other	0	1,419,000	0
Net cash provided by (used in) investing activities	(71,296,000)	(124,327,000)	49,527,000
Cash flows from financing activities:
Distributions	0	(9,814,000)	(39,254,000)
Proceeds from issuance of long-term debt	703,750,000	0	323,680,000
Payments on long-term debt	(285,857,000)	(2,428,000)	(212,920,000)
Net additions to (reductions in) short-term borrowings	(43,000,000)	10,200,000	(51,379,000)
Net additions to (reductions in) collateralized short-term borrowings	(62,000,000)	4,000,000	(11,000,000)
Cash paid for financing costs and other	(29,458,000)	(548,000)	(18,535,000)
Noncontrolling interest activity	(158,000)	(415,000)	(716,000)
Cash payments for principal portion of lease liability	(2,116,000)	0	0
Net cash provided by (used in) financing activities	281,161,000	995,000	(10,124,000)
Increase (decrease) in cash and cash equivalents	322,707,000	(108,257,000)	113,551,000
Cash and cash equivalents - beginning of year	11,054,000	119,311,000	5,760,000
Cash, cash equivalents and restricted cash - end of year	333,761,000	11,054,000	119,311,000
Ferrellgas Partners Finance Corp. [Member]
Cash flows from operating activities:
Net loss	(5,827)	(3,999)	(2,115)
Reconciliation of net loss to net cash provided by operating activities:
Deferred income tax expense (benefit)	0	0	0
Changes in operating assets and liabilities, net of effects from business acquisitions:
Prepaid expenses and other current assets	8	(8)	(1,850)
Net cash provided by operating activities	(5,819)	(4,007)	(3,965)
Cash flows from financing activities:
Capital contribution	5,819	4,007	3,965
Net cash provided by (used in) financing activities	5,819	4,007	3,965
Increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents - beginning of year	1,000	1,000	1,000
Cash, cash equivalents and restricted cash - end of year	1,000	1,000	1,000
Ferrellgas, L.P. [Member]
Cash flows from operating activities:
Net loss	(49,764,000)	(29,517,000)	(222,146,000)
Reconciliation of net loss to net cash provided by operating activities:
Depreciation and amortization expense	80,481,000	78,846,000	101,795,000
Non-cash employee stock ownership plan compensation charge	2,871,000	5,693,000	13,859,000
Asset impairments			10,005,000
Loss on asset sales and disposals	7,924,000	10,968,000	187,399,000
Loss on extinguishment of debt, noncash	19,883,000
Unrealized gain on derivative instruments	0	0	(91,000)
Provision for doubtful accounts	18,604,000	1,525,000	1,778,000
Deferred income tax expense (benefit)	554,000	143,000	(3,818,000)
Exit costs associated with contracts			11,804,000
Other	11,301,000	8,505,000	6,266,000
Changes in operating assets and liabilities, net of effects from business acquisitions:
Accounts and notes receivable, net of securitization	(121,000)	19,433,000	18,629,000
Inventories	7,790,000	3,211,000	(1,231,000)
Prepaid expenses and other current assets	7,375,000	(26,458,000)	(2,942,000)
Accounts payable	1,223,000	(13,338,000)	(24,189,000)
Accrued interest expense	17,961,000	(1,738,000)	3,551,000
Other current liabilities	(3,430,000)	(12,076,000)	7,235,000
Other assets and liabilities	5,679,000	765,000	(2,750,000)
Net cash provided by operating activities	128,331,000	45,962,000	105,154,000
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(10,195,000)	(13,551,000)	(18,141,000)
Capital expenditures	(70,455,000)	(108,822,000)	(84,919,000)
Proceeds from sale of assets	4,472,000	5,699,000	152,587,000
Cash payments to construct assets in connection with future lease transactions	(37,042,000)	(9,934,000)
Cash receipts in connection with leased vehicles	41,924,000	862,000
Other		1,419,000
Net cash provided by (used in) investing activities	(71,296,000)	(124,327,000)	49,527,000
Cash flows from financing activities:
Distributions	(15,654,000)	(41,121,000)	(70,962,000)
Proceeds from issuance of long-term debt	703,750,000		323,680,000
Payments on long-term debt	(285,857,000)	(2,428,000)	(212,920,000)
Net additions to (reductions in) short-term borrowings	(43,000,000)	10,200,000	(51,379,000)
Net additions to (reductions in) collateralized short-term borrowings	(62,000,000)	4,000,000	(11,000,000)
Cash paid for financing costs and other	(29,449,000)	(548,000)	(18,493,000)
Net changes in advances with consolidated entities	0	0	0
Cash payments for principal portion of lease liability	(2,116,000)
Net cash provided by (used in) financing activities	265,674,000	(29,897,000)	(41,074,000)
Increase (decrease) in cash and cash equivalents	322,709,000	(108,262,000)	113,607,000
Cash and cash equivalents - beginning of year	11,046,000	119,308,000	5,701,000
Cash, cash equivalents and restricted cash - end of year	333,755,000	11,046,000	119,308,000
Ferrellgas Finance Corp. [Member]
Cash flows from operating activities:
Net loss	(6,010)	(5,625)	(5,216)
Reconciliation of net loss to net cash provided by operating activities:
Deferred income tax expense (benefit)	0	0	0
Changes in operating assets and liabilities, net of effects from business acquisitions:
Prepaid expenses and other current assets	341	(341)	0
Net cash provided by operating activities	(5,669)	(5,966)	(5,216)
Cash flows from financing activities:
Capital contribution	5,669	5,966	5,216
Net cash provided by (used in) financing activities	5,669	5,966	5,216
Increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents - beginning of year	1,100	1,100	1,100
Cash, cash equivalents and restricted cash - end of year	$ 1,100	$ 1,100	$ 1,100