Consolidated Statements Of Cash Flows - USD ($)	6 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Cash flows from operating activities:
Net earnings (loss)	$ (13,633,000)	$ (50,090,000)
Reconciliation of net earnings (loss) to net cash provided by operating activities:
Depreciation and amortization expense	38,597,000	51,217,000
Non-cash employee stock ownership plan compensation charge	4,692,000	7,993,000
Asset impairment charges	0	10,005,000
Loss on asset sales and disposals	6,720,000	40,144,000
Unrealized gain (loss) on derivatives	0	(91,000)
Provision for doubtful accounts	1,576,000	1,688,000
Deferred tax expense (benefit)	141,000	364,000
Other	6,843,000	4,482,000
Changes in operating assets and liabilities, net of effects from business acquisitions:
Accounts and notes receivable, net of securitization	(78,686,000)	(102,315,000)
Inventories	(6,090,000)	(17,275,000)
Prepaid expenses and other current assets	(16,351,000)	(4,682,000)
Accounts payable	16,441,000	11,510,000
Accrued interest expense	(260,000)	304,000
Other current liabilities	(8,944,000)	13,372,000
Other assets and liabilities	(6,164,000)	(2,920,000)
Net cash used in operating activities	(55,118,000)	(36,294,000)
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(5,069,000)	(14,862,000)
Capital expenditures	(58,330,000)	(35,693,000)
Proceeds from sale of assets	1,960,000	4,207,000
Net cash used in investing activities	(61,439,000)	(46,348,000)
Cash flows from financing activities:
Distributions	(9,814,000)	(19,627,000)
Proceeds from increase in long-term debt	0	23,580,000
Payments on long-term debt	(1,014,000)	(1,267,000)
Net additions to (reductions in) short-term borrowings	(32,800,000)	(7,879,000)
Net additions to collateralized short-term borrowings	82,000,000	97,000,000
Cash paid for financing costs	(221,000)	(395,000)
Noncontrolling interest activity	(258,000)	(357,000)
Net cash provided by (used in) financing activities	37,893,000	91,055,000
Increase (decrease) in cash and cash equivalents	(78,664,000)	8,413,000
Cash and cash equivalents - beginning of year	119,311,000	5,760,000
Cash and cash equivalents - end of year	40,647,000	14,173,000
Ferrellgas Partners Finance Corp. [Member]
Cash flows from operating activities:
Net earnings (loss)	(1,941)	(275)
Changes in operating assets and liabilities, net of effects from business acquisitions:
Prepaid expenses and other current assets	1,850	0
Net cash used in operating activities	(91)	(275)
Cash flows from financing activities:
Capital contribution	91	275
Net cash provided by (used in) financing activities	91	275
Increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents - beginning of year	1,000	1,000
Cash and cash equivalents - end of year	1,000	1,000
Ferrellgas, L.P. [Member]
Cash flows from operating activities:
Net earnings (loss)	3,803,000	(32,852,000)
Reconciliation of net earnings (loss) to net cash provided by operating activities:
Depreciation and amortization expense	38,597,000	51,217,000
Non-cash employee stock ownership plan compensation charge	4,692,000	7,993,000
Asset impairment charges	0	10,005,000
Loss on asset sales and disposals	6,720,000	40,144,000
Unrealized gain (loss) on derivatives	0	(91,000)
Provision for doubtful accounts	1,576,000	1,688,000
Deferred tax expense (benefit)	141,000	364,000
Other	4,736,000	2,650,000
Changes in operating assets and liabilities, net of effects from business acquisitions:
Accounts and notes receivable, net of securitization	(78,686,000)	(102,315,000)
Inventories	(6,090,000)	(17,275,000)
Prepaid expenses and other current assets	(16,321,000)	(4,637,000)
Accounts payable	16,441,000	11,510,000
Accrued interest expense	(259,000)	304,000
Other current liabilities	(8,944,000)	13,662,000
Other assets and liabilities	(6,120,000)	(3,208,000)
Net cash used in operating activities	(39,714,000)	(20,841,000)
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(5,069,000)	(14,862,000)
Capital expenditures	(58,330,000)	(35,693,000)
Proceeds from sale of assets	1,960,000	4,207,000
Net cash used in investing activities	(61,439,000)	(46,348,000)
Cash flows from financing activities:
Distributions	(25,568,000)	(35,380,000)
Proceeds from increase in long-term debt	0	23,580,000
Payments on long-term debt	(1,014,000)	(1,267,000)
Net additions to (reductions in) short-term borrowings	(32,800,000)	(7,879,000)
Net additions to collateralized short-term borrowings	82,000,000	97,000,000
Cash paid for financing costs	(221,000)	(395,000)
Net cash provided by (used in) financing activities	22,397,000	75,659,000
Increase (decrease) in cash and cash equivalents	(78,756,000)	8,470,000
Cash and cash equivalents - beginning of year	119,308,000	5,701,000
Cash and cash equivalents - end of year	40,552,000	14,171,000
Ferrellgas Finance Corp. [Member]
Cash flows from operating activities:
Net earnings (loss)	(5,400)	(5,216)
Changes in operating assets and liabilities, net of effects from business acquisitions:
Prepaid expenses and other current assets	1,500	1,500
Net cash used in operating activities	(3,900)	(3,716)
Cash flows from financing activities:
Capital contribution	3,900	3,716
Net cash provided by (used in) financing activities	3,900	3,716
Increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents - beginning of year	1,100	1,100
Cash and cash equivalents - end of year	$ 1,100	$ 1,100