Consolidated Statements Of Cash Flows - USD ($)	6 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Cash flows provided by (used in) operating activities:
Net earnings (loss)	$ (50,090,000)	$ (4,943,000)
Reconciliation of net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization expense	51,217,000	51,809,000
Non-cash employee stock ownership plan compensation charge	7,993,000	6,699,000
Non-cash stock-based compensation charge	0	3,298,000
Asset Impairment Charges	10,005,000	0
Loss on Disposal of Assets and Asset Impairment Charges	40,144,000	6,468,000
Unrealized Gain (Loss) on Derivatives	(91,000)	(1,862,000)
Provision for doubtful accounts	1,688,000	(283,000)
Deferred tax expense	364,000	35,000
Other	4,482,000	2,659,000
Changes in operating assets and liabilities, net of effects from business acquisitions:
Accounts and notes receivable, net of securitization	(102,315,000)	(74,403,000)
Inventories	(17,275,000)	(24,268,000)
Prepaid expenses and other current assets	(4,682,000)	7,060,000
Accounts payable	11,510,000	40,444,000
Accrued interest expense	304,000	1,916,000
Other current liabilities	13,372,000	19,951,000
Other assets and liabilities	(2,920,000)	4,757,000
Net cash provided by (used in) operating activities	(36,294,000)	39,337,000
Cash flows provided by (used in) investing activities:
Business acquisitions, net of cash acquired	(14,862,000)	0
Capital expenditures	(35,693,000)	(19,768,000)
Proceeds from sale of assets	4,207,000	4,591,000
Other	0	(37,000)
Net cash used in investing activities	(46,348,000)	(15,214,000)
Cash flows provided by (used in) financing activities:
Distributions	(19,627,000)	(60,107,000)
Proceeds from issuance of long-term debt	23,580,000	204,444,000
Payments on long-term debt	(1,267,000)	(172,790,000)
Net additions to (reductions in) short-term borrowings	(7,879,000)	(35,692,000)
Net additions to collateralized short-term borrowings	97,000,000	69,000,000
Cash paid for financing costs	(395,000)	(4,382,000)
Proceeds from (Payments to) Noncontrolling Interests	(357,000)	1,000,000
Payments for Repurchase of Common Stock	0	(15,851,000)
Net cash provided by (used in) financing activities	91,055,000	(14,378,000)
Net change in cash and cash equivalents	8,413,000	9,745,000
Cash and cash equivalents - beginning of period	5,760,000	4,965,000
Cash and cash equivalents - end of period	14,173,000	14,710,000
Ferrellgas Partners Finance Corp. [Member]
Cash flows provided by (used in) operating activities:
Net earnings (loss)	(275)	(92)
Changes in operating assets and liabilities, net of effects from business acquisitions:
Net cash provided by (used in) operating activities	(275)	(92)
Cash flows provided by (used in) financing activities:
Capital contribution	275	92
Net cash provided by (used in) financing activities	275	92
Net change in cash	0	0
Cash - beginning of period	1,000	1,000
Cash - end of period	1,000	1,000
Ferrellgas, L.P. [Member]
Cash flows provided by (used in) operating activities:
Net earnings (loss)	(32,852,000)	3,160,000
Reconciliation of net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization expense	51,217,000	51,809,000
Non-cash employee stock ownership plan compensation charge	7,993,000	6,699,000
Non-cash stock-based compensation charge	0	3,298,000
Asset Impairment Charges	10,005,000	0
Loss on Disposal of Assets and Asset Impairment Charges	40,144,000	6,468,000
Unrealized Gain (Loss) on Derivatives	(91,000)	(1,862,000)
Provision for doubtful accounts	1,688,000	(283,000)
Deferred tax expense	364,000	35,000
Other	2,650,000	2,448,000
Changes in operating assets and liabilities, net of effects from business acquisitions:
Accounts and notes receivable, net of securitization	(102,315,000)	(74,403,000)
Inventories	(17,275,000)	(24,268,000)
Prepaid expenses and other current assets	(4,637,000)	6,924,000
Accounts payable	11,510,000	40,444,000
Accrued interest expense	304,000	(12,000)
Other current liabilities	13,662,000	20,087,000
Other assets and liabilities	(3,208,000)	4,757,000
Net cash provided by (used in) operating activities	(20,841,000)	45,301,000
Cash flows provided by (used in) investing activities:
Business acquisitions, net of cash acquired	(14,862,000)	0
Capital expenditures	(35,693,000)	(19,768,000)
Proceeds from sale of assets	4,207,000	4,591,000
Other	0	(37,000)
Net cash used in investing activities	(46,348,000)	(15,214,000)
Cash flows provided by (used in) financing activities:
Distributions	(35,380,000)	(84,500,000)
Contributions from partners	0	167,640,000
Proceeds from issuance of long-term debt	23,580,000	36,444,000
Payments on long-term debt	(1,267,000)	(172,790,000)
Net additions to (reductions in) short-term borrowings	(7,879,000)	(35,692,000)
Net additions to collateralized short-term borrowings	97,000,000	69,000,000
Cash paid for financing costs	(395,000)	(1,422,000)
Net cash provided by (used in) financing activities	75,659,000	(21,320,000)
Net change in cash and cash equivalents	8,470,000	8,767,000
Cash and cash equivalents - beginning of period	5,701,000	4,890,000
Cash and cash equivalents - end of period	14,171,000	13,657,000
Ferrellgas Finance Corp. [Member]
Cash flows provided by (used in) operating activities:
Net earnings (loss)	(5,216)	(4,950)
Changes in operating assets and liabilities, net of effects from business acquisitions:
Prepaid expenses and other current assets	1,500	1,500
Net cash provided by (used in) operating activities	(3,716)	(3,450)
Cash flows provided by (used in) financing activities:
Capital contribution	3,716	3,450
Net cash provided by (used in) financing activities	3,716	3,450
Net change in cash	0	0
Cash - beginning of period	1,100	1,100
Cash - end of period	$ 1,100	$ 1,100